Ra 120 Manual Usuario Ingles Ba126501

No. 99MBB203A1SERIES No. 211

Roundness/Cylindricity Measuring System

Read this Users Manual thoroughly before operating the instrument. After reading,

retain it close at hand for future reference.

RA-120

Users Manual

CONVENTIONS USED IN THIS MANUAL

Safety Precautions To ensure that instruments are operated correctly and safely, Mitutoyo manuals use various safety symbols (Signal Words and Safety Alert Symbols) to identify and warn against hazards and potential accidents.

The following signs indicate general warnings:

DANGER

Indicates an imminently hazardous situation which, if not avoided, will result in serious injury or death.

WARNING

Indicates a potentially hazardous situation which, if not avoided, could result in serious injury or death.

CAUTION

Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury or property damage.

The following signs indicate specific warnings or prohibited actions, or indicate a mandatory action:

Alerts the user to a specific hazardous situation. The given example means Caution, risk of electric shock.

Prohibits a specific action. The given example means Do not disassemble.

Specifies a required action. The given example means Ground.

No. 99MBB203A i

CONVENTIONS USED IN THIS MANUAL

Types of Notes The following types of notes are used in this manual to help the operator obtain reliable measurement data through correct instrument operation.

IMPORTANT An important note provides information essential to the completion of a task. You cannot disregard this note to complete the task.

An important note is a type of precaution, which if neglected could result in a loss of data, decreased accuracy or instrument malfunction/failure.

NOTE A note emphasizes or supplements important points of the main text. It also supplies information about specific situations (e.g., memory limitations, equipment configurations, or details that apply to specific versions of a program).

TIP A tip is a type of note that helps the user apply the techniques and procedures described in the text to his or her specific needs.

It also provides reference information associated with the topic being discussed.

Mitutoyo assumes no liability to any party for any loss or damage, direct or

indirect, caused by use of this instrument not conforming to this manual. However,

except as expressly specified in the Mitutoyo Software License Agreement, in no

event shall Mitutoyo be liable to any party for any loss of damage caused by use

of this instrument conforming or not conforming to this manual.

Information in this document is subject to change without notice.

2007 Mitutoyo Corporation. All rights reserved.

No. 99MBB203A ii

Safety Precautions (Essential Reading) Observe the precautions/instructions given on the following pages in order to obtain the highest performance from the machine and to ensure safety.

WARNING

Do not modify the machine, as this may cause fire or electric shock Do not rework, bend by force, twist and yank the power code, as this may cause fire or

electric shock.

Do not remove the front panel, the rear panel, the side panel and the covers of the machine, as this may cause electric shock.

Use under the specified power supply voltage. Do not use under the unspecified power supply voltage, as this may cause fire or electric shock.

Do not install the machine on an unstable table, as this may cause injury due to dropping or falling.

Do not place a case with water and a vase, etc., around the machine. When the water get inside the machine, it may cause fire or electric shock. In case the water, etc., get inside the machine, first unplug the power cord from the outlet then contact your dealer or the nearest Mitutoyo sales office.

CAUTION

When performing the maintenance, be sure to unplug the power cord for safety. If the maintenance is performed while connecting the power cord, it may cause electric shock.

Do not pull the power cord when unplugging it, as this may damage the cord and cause fire or electric shock.

Do not insert or pull out the plug with wet hands, as this may cause fire or electric shock. Do not bring the power cord close to the heated equipment, as this may melt the

sheathing of the cord and cause fire or electric shock.

The cable of the detector unit should be arranged so that it will not be caught by the workpiece fixture or operation knobs when the turntable rotates.

No. 99MBB203A iii

CAUTION

For the battery used equipment only Use only specified battery. If the unspecified battery is used, it may cause fire or injury due to the explosion or leaking, etc., of the battery. When installing the battery in the equipment, set the battery poles correctly by following the instruction of the equipment. If the battery is installed incorrectly, it may cause fire or injury due to explosion or leaking, etc., of the battery.

Place the unit where the power plug of the machine can be recognized and reached easily when unplugging.

Do not exert external forces to the machine, as this may cause failure, damage or deterioration in accuracy.

Do not hold unspecified position when carrying, as this may cause failure, damage ordeterioration in accuracy.

When installing/replacing the lamp and accessories, do not pinch or hit the finger, as this may cause injury.

Be sure to use the specified accessories in the users manual for the machine. If the unspecified accessories are used, it may cause fire, electric shock or failure.

Warranty In the event that the Mitutoyo product, except software product, should prove defective in workmanship or material, within one year from the date of original purchase for use, it will be repaired or replaced, at out option, free of charge upon its prepaid return to us.

If the product fails or is damaged for any of the following reasons, it will be subject to a repair charge, even if it is still under warranty.

1 Failure or damage owing to inappropriate handling or unauthorized modification.

2 Failure or damage owing to transport, dropping, or relocation of the instrument after purchase.

3 Failure or damage due to improper maintenance or storage.

4 Failure or damage due to abnormal voltage or use of undesignated power supply (voltage, frequency).

5 Accident or damage due to fire, earthquake, flood, thunderbolt or other natural catastrophe, pollution, smoke or gas (SOx, etc.).

6 If the warranty card (certificate) is not shown.

7 Failure or damage which Mitutoyo Corporation can not take responsibility.

This warranty is effective only where the instrument is properly installed and operated in conformance with the instructions in this manual.

No. 99MBB203A iv

Export Control Compliance This Product falls into the Catch-All-Controlled Goods or Program under the Category 16 of the Separate Table 1 of the Export Trade Control Order or the Category 16 of the Separate Table of the Foreign Exchange Control Order, based on the Foreign Exchange and Foreign Trade Law of Japan.

Further, this Users Manual also falls into the Catch-All-Controlled Technology for use of the Catch-All-Controlled Goods or Program, under the Category 16 of the Separate Table of the Foreign Exchange Control Order.

If you intend re-exporting or re-providing the product or technology to any party other than yourself, please consult with Mitutoyo prior to such re-exporting or re-providing.

Disposal of Old Electrical & Electronic Equipment (Applicable in the European Union and other European countries with separate collection systems)

This symbol on the product or on its packaging indicates that this product shall not be treated as household waste. To reduce the environmental impact of WEEE (Waste Electrical and Electronic Equipment) and minimize the volume of WEEE entering landfills, please reuse and recycle. For further information, please contact your local dealer or distributors.

No. 99MBB203A v

Contents

CONVENTIONS USED IN THIS MANUAL........................................................................................................ i

Safety Precautions (Essential Reading)....................................................................................................... iii

Warranty........................................................................................................................................................... iv

Export Control Compliance ............................................................................................................................ v

Disposal of Old Electrical & Electronic Equipment (Applicable in the European Union and other European countries with separate collection systems) .............................................................................. v

1 INTRODUCTION .................................................................................................................................... 1-1

1.1 Outline of RA-120........................................................................................................................... 1-1 1.2 System Configuration ................................................................................................................... 1-1 1.3 Name and Function of Each Part ................................................................................................. 1-2

1.3.1 Main unit ................................................................................................................................. 1-2 1.3.2 Air filter unit.......................................................................................................................... 1-10

2 INSTALLATION...................................................................................................................................... 2-1

2.1 Installation Environment............................................................................................................... 2-1 2.2 Installation...................................................................................................................................... 2-2

2.2.1 Installing the main unit and air filter .................................................................................... 2-2 2.2.2 Attaching the detector unit ................................................................................................... 2-2 2.2.3 Cable connection ................................................................................................................... 2-3 2.2.4 Unlocking the air bearing clamp .......................................................................................... 2-4 2.2.5 Leveling the main unit ........................................................................................................... 2-5 2.2.6 Setting up the alignment table.............................................................................................. 2-6 2.2.7 Setting Up the SD Scale ........................................................................................................ 2-7

2.3 Adjusting the Detector Position................................................................................................... 2-8 2.3.1 Adjustment in vertical detector orientation......................................................................... 2-8 2.3.2 Adjustment in horizontal detector orientation .................................................................... 2-9

2.4 Starting Up or Shutting Down the Main Unit............................................................................. 2-10

3 BASIC OPERATION .............................................................................................................................. 3-1

3.1 Booting the RA-120 ....................................................................................................................... 3-1 3.2 Workpiece Setup............................................................................................................................ 3-2 3.3 Performing Measurement/Analysis Using the Keys to Call Conditions .................................. 3-7

3.3.1 What are the keys to call conditions for?............................................................................ 3-7 3.4 Printing the Results..................................................................................................................... 3-11

3.4.1 Printing.................................................................................................................................. 3-11 3.4.2 Paper feeding ....................................................................................................................... 3-11

3.5 Saving the Measurement Results .............................................................................................. 3-12 3.6 Turning off the RA-120 ................................................................................................................ 3-12

4 CALIBRATION MEASUREMENT.......................................................................................................... 4-1

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4.1 Calibrating the Detector................................................................................................................ 4-1 4.1.1 Performing static calibration ................................................................................................ 4-1 4.1.2 Performing dynamic calibration........................................................................................... 4-4

4.2 Modifying the Calibration Screen Conditions ............................................................................ 4-6 4.2.1 Switching between Static and Dynamic Calibrations ........................................................ 4-6 4.2.2 Modifying the static calibration conditions ........................................................................ 4-7 4.2.3 Modifying the dynamic calibration conditions ................................................................... 4-9

5 CENTERING/LEVELING MEASUREMENT.......................................................................................... 5-1

5.1 Centering/Leveling ........................................................................................................................ 5-1 5.1.1 Setting a workpiece ............................................................................................................... 5-2 5.1.2 Measuring the centering/leveling amounts......................................................................... 5-5 5.1.3 Adjusting the centering/leveling amounts ........................................................................ 5-16

5.2 Modifying the Centering Screen Conditions ............................................................................ 5-19 5.2.1 Modifying the measuring conditions for centering/leveling ........................................... 5-19 5.2.2 Modifying the centering/leveling adjustment conditions ................................................ 5-24

6 MEASUREMENT/ ANALYSIS ............................................................................................................... 6-1

6.1 Measuring Procedure of Each Analysis Element....................................................................... 6-2 6.1.1 Roundness (single cross section) ....................................................................................... 6-2 6.1.2 Coaxiality [3 cross sections] ................................................................................................ 6-5 6.1.3 Concentricity (dual cross section)....................................................................................... 6-8 6.1.4 Circular runout (radial direction) ........................................................................................6-11 6.1.5 Circular runout (axial direction) ......................................................................................... 6-14 6.1.6 Squareness (axis reference)............................................................................................... 6-18 6.1.7 Squareness (plane reference) ............................................................................................ 6-22 6.1.8 Thickness deviation ............................................................................................................ 6-25 6.1.9 Flatness (single cross section) .......................................................................................... 6-28 6.1.10 Parallelism............................................................................................................................ 6-31

6.2 Element Measurement Procedure ............................................................................................. 6-34 6.3 Listing or Deleting Measured Elements (Cross Sections) ...................................................... 6-38

6.3.1 Listing the measured elements (cross sections) ............................................................. 6-38 6.3.2 Deleting measured elements (cross sections) ................................................................. 6-38

6.4 Switching to Other Analysis Result Displays........................................................................... 6-39 6.5 Modifying the Measurement Screen Conditions...................................................................... 6-40

6.5.1 Procedures for changing items.......................................................................................... 6-41 6.6 Modifying the Result Screen Conditions .................................................................................. 6-47

6.6.1 Procedures for changing items.......................................................................................... 6-48

7 CONDITIONS REGISTRATION............................................................................................................. 7-1

7.1 Conditions Registration Function ............................................................................................... 7-1 7.2 Condition Registration Procedures............................................................................................. 7-2

7.2.1 Booting the registration screen ........................................................................................... 7-2 7.2.2 Calibration ratio setup........................................................................................................... 7-3 7.2.3 Centering condition setup .................................................................................................... 7-4

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7.2.4 Measurement conditions setup............................................................................................ 7-6 7.2.5 Registration name setup ....................................................................................................... 7-7 7.2.6 Completion of registration .................................................................................................... 7-9

7.3 Conditions Input/Output ............................................................................................................. 7-10 7.3.1 Condition call ....................................................................................................................... 7-10 7.3.2 Condition output .................................................................................................................. 7-12 7.3.3 Condition deletion................................................................................................................ 7-13

7.4 Initializing the Registered Conditions ....................................................................................... 7-14

8 DATA INPUT/OUTPUT........................................................................................................................... 8-1

8.1 Registering a File........................................................................................................................... 8-1 8.1.1 Registering a measurement file............................................................................................ 8-1 8.1.2 Registering a result file ......................................................................................................... 8-4

8.2 Recalling a Registered File........................................................................................................... 8-6 8.2.1 Recalling a measurement file ............................................................................................... 8-6 8.2.2 Recalling a result file ............................................................................................................. 8-7

8.3 Deleting a File ................................................................................................................................ 8-9 8.3.1 Deleting a measurement file ................................................................................................. 8-9 8.3.2 Deleting a result file............................................................................................................. 8-10

8.4 Outputting Data............................................................................................................................ 8-12 8.4.1 RS-232C output .................................................................................................................... 8-12 8.4.2 SPC output............................................................................................................................ 8-13 8.4.3 USB output (Saving in a USB memory) ............................................................................. 8-14

9 SETTING THE OPERATING ENVIRONMENT...................................................................................... 9-1

9.1 Setting Auto-execution ................................................................................................................. 9-1 9.2 Setting Parameters........................................................................................................................ 9-3 9.3 Setting the Devices (RA-120 Hardware) ...................................................................................... 9-5 9.4 System Setup................................................................................................................................. 9-8 9.5 Key Setup ..................................................................................................................................... 9-10 9.6 Auxiliary Functions ..................................................................................................................... 9-12

10 MAINTENANCE AND INSPECTION ................................................................................................... 10-1

10.1 Daily Inspection and Maintenance............................................................................................. 10-1 10.1.1 Inspection before measurement......................................................................................... 10-1 10.1.2 Maintenance after measurement ........................................................................................ 10-2

10.2 Replacing Consumables............................................................................................................. 10-3 10.2.1 Replacing the elements in the air filter unit ...................................................................... 10-3 10.2.2 Loading the printer paper.................................................................................................... 10-4 10.2.3 Replacing the battery in Centripetal aligning table Unit .................................................. 10-5

11 APPENDIX ........................................................................................................................................... 11-1

11.1 Evaluation Methods of Individual Analysis Parameter............................................................ 11-1 11.1.1 Roundness Evaluation Methods ........................................................................................ 11-1 11.1.2 Flatness Evaluation Methods ............................................................................................. 11-2

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11.2 Filters.............................................................................................................................................11-3 11.2.1 About cutoff values ..............................................................................................................11-3 11.2.2 Filter types.............................................................................................................................11-4 11.2.3 Phase corrected filters .........................................................................................................11-7 11.2.4 Difference of filter characteristics ......................................................................................11-8

11.3 Analysis Item ................................................................................................................................11-9 11.3.1 Descriptions of the Analysis Item.......................................................................................11-9 11.3.2 Evaluation Methods Selectable for Each Analysis item .................................................11-14

11.4 Datum ..........................................................................................................................................11-15 11.4.1 Kind of datum......................................................................................................................11-15 11.4.2 Table of Datum Types Required by Analysis Items.........................................................11-16 11.4.3 Table of Datum and Its Necessary Number of Elements ................................................11-16

11.5 Unit System and Number of Display Digits .............................................................................11-17 11.6 Printer ..........................................................................................................................................11-18

11.6.1 Parallel output.....................................................................................................................11-18 11.6.2 Record magnification and record range ..........................................................................11-20

11.7 Data Output .................................................................................................................................11-21 11.7.1 RS-232C output ................................................................................................................11-21 11.7.2 SPC Output..........................................................................................................................11-23 11.7.3 USB output ..........................................................................................................................11-26

11.8 Notch Processing.......................................................................................................................11-27 11.8.1 How to set Notch Processing............................................................................................11-27

12 SPECIFICATIONS ............................................................................................................................... 12-1

12.1 System Specifications ................................................................................................................ 12-1 12.2 Standard Accessories................................................................................................................. 12-3 12.3 Optional Accessories.................................................................................................................. 12-4

13 TROUBLESHOOTING......................................................................................................................... 13-1

Service Network

No. 99MBB203A ix

MEMO

No. 99MBB203A x

1 INTRODUCTION

1

1.1 Outline of RA-120 The Roundtest RA-120 series is a roundness measuring system that can measure roundness and cylindrical properties with high accuracy. The RA-120 series is multi-purpose, has enhanced operability, and includes the following features.

The RA-120 employs a high precision air-bearing type turntable, offering enhanced measurement accuracy, reliability, and durability. There is no accuracy deterioration due to abrasion.

Workpiece centering and leveling can be performed simply and speedily with the HELP function.

The built-in thermal line printer outputs measured data, setup parameters, and graphs (circular cross section and development).

The integrated construction of the measuring unit and display/control unit minimizes the installation space required.

Capable of performing detector positioning operation efficiently thanks to the X/Z-axis drive wheels centered on the slider unit.

1.2 System Configuration The RA-120 system is mainly comprised of two units: the main unit and the air filter unit.

Main unit Air filter unit

No. 99MBB203A 1-1

1.3 Name and Function of Each Part This section gives the name and function of each part.

Main unit rear panel

Control panel

Column unit

Detector holder

X-axis arm

Alignment table

1.3.1 Main unit

SD scale

Detector

CAUTION

To use the measuring unit safely, read "Safety Precautions" in this manual prior to use and observe all the precautions.

No. 99MBB203A 1-2

1. INTRODUCTION

1.3.1.1 Alignment table

The alignment table is used for centering and leveling a workpiece.

The RA-120 employs Digimatic heads as centering knobs and leveling knobs for the D.A.T. (Digital Adjustable Table) function.

Table top view

CAUTION

The alignment table rotates at a speed of 6rpm during measurement. Be careful so as not to bump your hand against either the centering knobs or the leveling knobs.

Turn only one of the alignment table knobs for one axis at a time. Correct adjustment may not be realized if two centering or leveling knobs for two axes are simultaneously turned.

Turntable diameter158 (circumference C3) 3-M5 Depth 8 (P.C.D143)

3-M5 Depth 10 (P.C.D91)

Center M5 Depth 10

Concentric grooves at four positions (1301047852)

CY centering Knob

CX centering Knob

LX leveling Knob

LY leveling Knob

Center point of inclination

No. 99MBB203A 1-3

1.3.1.2 Detector

This detector can detect stylus displacement within 1000m

Switching can be performed between IN/OUT by turning the thimble.

+displacementadjusting screw

Thimble (for switching between IN/OUT)Adapter

Protractor -displacementadjusting screw

CAUTION

Two screws are mounted on the detector side to limit the detecting range and are used to adjust the stylus displacement. The screws are locked in place with paint before shipping. They are adjusted for a detecting range of 1000m. Do not adjust these screws unless specifically required.

1.3.1.3 Detector holder

This is an auxiliary arm to support the detector.

Detector holder

Holder clamp knob (Loosen the knob and switch the detector holder orientation from vertical to horizontal and vice versa.)

Detector clamp knob (Loosen the knob and rotate the detector to change the direction of displacement detection.)

X axis arm

Detector

Adapter

Reference line

Detector positioning mark

IMPORTANT The detector is positioned in place by the adapter.

When using this instrument with the adaptor removed, ensure that the detector reference line is aligned with the detector position mark on the detector holder. If a measuring direction is to be changed by turning the detector, exercise great care.

There are two detector base lines. Align the base line that corresponds to the measuring direction with the detector positioning mark.

No. 99MBB203A 1-4

1. INTRODUCTION

Measurements are possible in the setups illustrated below by changing the direction of the detector holder and detector.

Setting to OUT Setting to IN

OD measurement ID measurement

Measurement in vertical orientation

Setting to OUT

Measuring the top surface of a workpiece* In this case, loosen the detector clamp knob and rotate the detector to change the detection direction to vertical.

OD measurement

Measurement in horizontal orientation

1.3.1.4 Column unit

To move the detector up and down (Z-axis) and to right and left (X-axis).

Z-axis drive wheel (vertical driving)

X-axis drive wheel (traverse driving)

The SD scale allows the detector height to be displayed on the control panel.

SD scale

CAUTION

Do not rotate the X and Z-drive wheels at both ends of the travel limited by stoppers for fear of damage to the mechanism.

No. 99MBB203A 1-5

1.3.1.5 Control panel

The control keys are arranged according to function, and include "ANALYSIS ITEMS", "CONDITION", SCREEN, "PRINTER", "RANGE", "SELECT/ENT", "MEASURE", ROTATE/STOP and "ZERO SET".

Analysis items Keys These keys are for setting analysis items.

No. 99MBB203A 1-6

1. INTRODUCTION

Keys to call conditions

Registered contents of operation (calibration ratio, centering measurement conditions, and measurement conditions) can be called with a single key operation. (Up to four items of operation contents can be registered.)

By registering the contents of operation such as measurement conditions, time consuming preliminary setup before measurement can be omitted.

Screen select keys

Performs switching between the LCD screen displays.

CENTERING: Switches to the centering screen

MEAS: Switches to the measurement screen

CAL: Switches to the calibration screen

RESULT: Switches to the results screen

NOTE If there is no measured data in memory, the Result screen will not be selected.

Printer keys

[PRINT] key: Press this key to start output to the printer. The output contents differ depending on the setting of print contents for condition setup/equipment setup.

[Result print]: Analysis results displayed in the Result screen are output.

[Hard copy]: The contents currently displayed in the screen are output without modification.

[FEED] key: Hold down this key to feed the printer paper.

CAUTION

Do not manually pull the paper out of the printer and do not feed the paper in the reverse direction. These actions may damage the printer.

The last meter of printer paper has red markings on both sides. Replace the print paper with a new roll according to this marking guide. Do not print without paper. This may cause the printer to fail.

No. 99MBB203A 1-7

Range switch keys

When in the measurement screen: Changes the measurement range.

When in the results screen: Changes the display magnification of the recorded profiles

MENU

Displays the menu screen for various operations such as file input/output, conditions registration, and environment setup.

CHANGE

Releases various settings from being locked (to start modification) and executes locking of the modified settings (to end modification).

CANCEL Cancels the selection of an item/content.

SELECT/ENT keys

ENT Loads the selected item/content.

Jog dial

This dial can be used to move the cursor, select an item, switch between options, and shift the electric zero-point of signals from the detector (zero-shift).

Measure key

Press START key to start measurement. Pressing STOP key during measurement stops the ongoing measurement.

ROTATE/STOP Key

Press this key to start/stop rotation of the alignment table (Rotating direction/Speed: Clockwise/6rpm).

Quick feed (outside dial)

Standard feed(inside dial)

No. 99MBB203A 1-8

1. INTRODUCTION

ZERO SET key

Pressing the key when the detector displacement is within the range of resetting sets the displacement to an approximate zero (0m).

CAUTION

The range of resetting is within the range indicated by parallel thick lines on the level meter.

Adjust the detector position by manipulating the X/Z drive wheels to bring the meter indicator into the range of resetting.

1.3.1.6 Rear panel

Power switch: [ | ] for power ON, [] for power OFF. Power inlet socket: Connects the power cord.

Detector cable connector: Connects the cable of the detector.

SD scale cable connector: Connects the cable of the SD scale.

AIR SIG: Connects the cable of the air filter unit.

Air inlet: Connects the air tube of the air filter unit.

CAUTION

After the power switch has been turned on, information will not be displayed on the LCD for approximately 10 seconds. Do not turn off the power switch within this time because the system executes initialization and a power-on check in this period.

+1000m

Range of resetting

-1000m

+1000m-1000m

Air inlet

Detector cable connector

AIR SIG.

Power switch

SD scale cable connector Power inlet socket

No. 99MBB203A 1-9

1.3.1.7 Connector panel

The connector panel is located on the right of the main unit for data output.

USB I/F: Outputs data to an USB memory (option).

Digimatic output: Outputs data to a Digimatic instrument (option).

Digimatic output USB I/F

1.3.2 Air filter unit

This unit removes dust and oil mist from the compressed air and supplies clean compressed air to the air bearing.

For information about how to replace elements in the air filter unit, refer to section 10.2.1, "Replacing the elements in the air filter unit".

Filter regurator

Pressure switch

Connect main unit

Compressed air

Air filter

CAUTION

Compressed air must always pass through the air filter unit.

Ensure that the pressure of air to be supplied to the main unit is 0.39MPa (4.0kgf/cm2).

If compressed air is supplied directly to the main unit, the air bearing will be contaminated with dust and oil mist, and unit failure will result.

No. 99MBB203A 1-10

2 INSTALLATION

2 2.1 Installation Environment

To maintain the high accuracy measuring performance of the RA-120 over an extended period, select an operating environment with the following characteristics.

Select a stable installation site with minimum vibration, dust, splashing oil, and temperature fluctuation.

Maintain the environmental temperature at 20C 10% during operation and avoid a sudden change in temperature.

Avoid using the system at a site with high humidity. (Humidity should be less than 85%RH, with no condensation.)

Use the power supply in a range between 90% and 110% of the rated voltage. Measurement made at a high sensitivity may be subject to even slight vibrations and

gentle air flows. Great care should be exercised when performing such high-sensitivity measurements.

Store this instrument in a place with an ambient temperature between -10C and 60C.

No. 99MBB203A 2-1

2.2 Installation 2.2.1 Installing the main unit and air filter

Install the system main according to the following figure.

2.2.2 Attaching the detector unit

Attach the detector unit and the detector unit holder on the X-axis arm.

IMPORTANT The detector is positioned in place by the adapter.

When using this instrument with the adaptor removed, ensure that the detector reference line is aligned with the detector position mark on the detector holder. If a measuring direction is to be changed by turning the detector, exercise great care.

There are two detector base lines. Align the base line that corresponds to the measuring direction with the detector positioning mark.

Power cord connecting position.

Air hose connecting position. *Install the air filter unit as

appropriate under such as the supporting table.

Detector holder

Holder clamp knob (Loosen the knob and switch the detector holder orientation from vertical to horizontal and vice versa.)

Detector clamp knob (Loosen the knob and rotate the detector to change the direction of displacement detection.

Reference line

)

X axis arm

Detector

Adapter

Detector positioning mark

Stylus (Insert into the detector unit)

No. 99MBB203A 2-2

2. INSTALLATION

2.2.3 Cable connection

Connect the system according to the following figure.

6 tube

Power cord

Coupling joint Hose band 1/4 air hose

SPC output cable

CAUTION

If abnormalities such as heat radiation, smoke, and a burning smell are detected after turning on the power switch, immediately turn off the power switch, then unplug the power cord from the outlet. If this instrument continues to be used under these conditions, a fire or an electric shock may result. Contact your dealer or the nearest Mitutoyo service network. To locate the nearest Mitutoyo sales office, refer to the service network list on the back cover of this manual.

No. 99MBB203A 2-3

2.2.4 Unlocking the air bearing clamp

Supply air to the main unit through the connected air filter unit.

IMPORTANT Be sure to perform the following operations while supplying the rated air pressure 0.39MPa (4.0kgf/cm2) to the main unit. If operation is not performed at the rated air pressure, the air bearing may be damaged.

Remove the fixture from the table base.

Unscrew the three screws to remove the fixture mounted across the upper face of the alignment table.

NOTE Do not discard the fixture. It is required for transporting the main unit.

No. 99MBB203A 2-4

2. INSTALLATION

2.2.5 Leveling the main unit

Turn the two auxiliary legs (marked with B) on the bottom of the main unit to pull them in. Place a level on the table in the direction shown below.

Adjust the height of three support legs (marked with A) on the bottom so that the main unit is leveled with the level on the table oriented in two directions (90 to each other).

After leveling has been completed, gently bring the two auxiliary legs (marked with B) into contact with the installation surface.

auxiliary leg B

Level

support leg A

support leg A

auxiliary leg B

support leg A

No. 99MBB203A 2-5

2.2.6 Setting up the alignment table

Supply air to the main unit through the air filter unit connected, and then attach the alignment table.

Turn the centering knobs (CX and CY) on the alignment table counterclockwise so that the center piece on the table base can be easily inserted into the center hole on the table.

Place the alignment table on the center-piece from above so that the centering knob CX comes on the screen side (right side in the figure below) when is 0 degree on the LCD screen.

Screen display: the position of the CX when is 0 degree.

CX

No. 99MBB203A 2-6

2. INSTALLATION

2.2.7 Setting Up the SD Scale

Installing a battery

Install a battery (SR44, one piece) in the display unit of the SD scale.

Refer to the leaflet about replacing the battery of the SD scale for details.

SR44 No.938882

TIP The battery lasts approximately 3.5 years. If a new battery is required, B will be displayed on the LCD. If this occurs, immediately replace the battery.

Setting the origin

At the factory, the alignment table top has been designated as the origin of the SD scale. If the [ORIGIN] or [ZERO/ABS] button has been accidentally pressed, restore the original condition according to the following procedure.

If the [ORIGIN] button has been pressed: Lower the detector until the stylus comes to the same height as that of the alignment table top. Hold the [ORIGIN] button down for more than one second at this stylus position. Zero will be displayed on the LCD of the SD scale, and the origin will be restored.

If the [ZERO/ABS] button has been pressed: Hold down the [ZERO/ABS] button again for more than two seconds. The character string INC disappears from the LCD of the SD scale, and the original condition is restored.

TIP If the SD scale surface is stained, "ErrC" will be displayed on the LCD or the displayed value will fluctuate. It is advisable to clean the scale surface and apply a small amount of low-viscosity oil to repel water.

If the Up/Down Feed knob is turned too quickly, the least significant digit on the LCD may display E, but measurement will not be affected. Continue the measurement operation. If the SD scale surface is stained, E may be displayed on the LCD in the position of the least significant digit. Clean the scale surface.

The SD scale is turned on or off independently of the power switch on the RA-120 main unit. Be sure to check the SD scale power before and after measurement.

No. 99MBB203A 2-7

2.3 Adjusting the Detector Position If the detector stylus tip deviates from the central line of the X axis on a work piece, an measurement error will occur. To eliminate the deviation, adjust the detector position according to the following procedure.

Adjustment of the detector position is divided into two parts: adjustment in vertical detector orientation and adjustment in horizontal detector orientation.

2.3.1 Adjustment in vertical detector orientation

(1) Perform centering of a work piece with the detector unit set in vertical orientation as shown in the figure at the right. (Refer to section 5 "CENTERING/LEVELING MEASUREMENT".)

(2) Stop the alignment table.

(3) While monitoring the stylus displacement display on the LCD screen, adjust the set screw so that stylus displacement is maximized. If the set screw is turned clockwise from the right side in the figure (or turned counterclockwise from the left side in the figure), the stylus moves toward the front.

(4) Increase the meter sensitivity, then repeat the procedure in step (1) to step (3).

Detector stylus tip

Detector holder

Counterclockwise Clockwise

Fulcrum

Setscrew Setscrew

* Loosen the two setscrews prior to adjustment. (Take care not to loosen the screws too much to avoid excessive play.)

* Fix the detector holder by tightening the setscrews after the adjustment is complete.

NOTE Particularly if measuring a small radius work piece at high accuracy, perform measurement with the detector holder set in the vertical orientation.

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2. INSTALLATION

2.3.2 Adjustment in horizontal detector orientation

(1) Set the detector unit in the horizontal orientation.

(2) Align the stylus tip with the central position of the X axis on a work piece.

a) If the stylus is used without being tilted, no adjustment is required.

b) If the stylus is used with a tilt, lower the detector by the difference in stylus tip position, as shown in the following figure.

(3) Without changing the vertical positional relationship of the detector, tilt the detector unit in the horizontal orientation. Confirm that the stylus tip does not deviate from the X-axis central position on the work piece.

Adaptor

No. 99MBB203A 2-9

2.4 Starting Up or Shutting Down the Main Unit The power switch is located on the rear side of the main unit.

Press the power switch on the [ | ] side to start up the RA-120. Press the power switch on the [] side to shut down the RA-120.

Power Switch

CAUTION

After the power switch has been turned on, information is not displayed on the LCD for approximately 10 seconds. Do not turn off the power switch within this time because the system executes initialization and a power-on check during this period.

The SD scale is turned on or off independently of the power switch on the RA-120 main unit. Be sure to check the SD scale power before and after measurement.

No. 99MBB203A 2-10

3 BASIC OPERATION This chapter describes a series of operations starting from booting the RA-120 through workpiece setup, measurement/analysis, data printing, data saving, and turning off the power.

3 3.1 Booting the RA-120

(1) Ensure that air of specified pressure 0.39MPa (4.0kgf/cm2) is supplied to the main unit via the air filter unit.

(2) Turn the power switch on the rear panel of the main unit to the [I] side to start the RA-120.

IMPORTANT Be sure to perform the following work with the main unit being supplied with the air of specified pressure 0.39MPa (4.0kgf/cm2).

The air bearing might be damaged when working with the air of the specified pressure not supplied.

CAUTION

After the power switch has been turned on, information is not displayed on the LCD for approximately 10 seconds. Do not turn off the power switch within this time because the system executes initialization and a power-on check during this period.

The SD scale (option) is turned on or off independently of the power switch on the RA-120 main unit. Be sure to check the SD scale power before and after measurement.

NOTE The level meter reading may electrically drift for about 10 minutes after the power-up of the instrument. To ensure accurate measurements, it is recommended that the instrument be turned on 10 minutes before starting measurement.

No. 99MBB203A

3-1

alignment table

Approximate center of the table

workpiece

3.2 Workpiece Setup To measure a workpiece with high accuracy, it must be set up on the alignment table with a minimum of eccentricity and inclination.

This section describes the procedure for setting up and roughly centering a workpiece on the alignment table.

For the procedure for exactly centering a workpiece, refer to 5. Centering/Leveling Measurement.

(1) Place a workpiece on the approximate center of the alignment table.

(2) Set the indicating range of the level meter to 1000m by pressing the range key.

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3. BASIC OPERATION

Move the detector stylus so much away from the workpiece that it will not come into contact with the workpiece when the table rotates.

X-axis drive wheel

(3) Turn the X-axis drive wheel and move the detector stylus away from the workpiece.

(4) Turn manually the alignment table.

(5) If the workpiece has been set up off-centered on the alignment table, the distance between the stylus tip and workpiece varies during table rotation. Stop the rotation of the table at the position where the distance between the stylus tip and the workpiece is at the maximum.

Minimum distance Maximum distance

Stop the table rotation at this position.

No. 99MBB203A 3-3

aMaximum distance

bMinimum distance

X-axis drive wheel

c. Difference between the maximum and minimum distances

d. Shift the workpiece by half of c.

(6) Manually shift the workpiece by half of the difference (c in the figure below) between the maximum distance (a in the figure below) and the minimum distance (b in the figure below) to position d in the figure below.

(7) Turn the X-axis drive wheel and bring the stylus tip into contact with the workpiece until the level meter reads an approximate zero (the center of the meter).

+1,000m

level meter Approximately at the center

-1,000m

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3. BASIC OPERATION

(8) Manually rotate the alignment table. The level meter fluctuates from side to side during the table rotation if the workpiece has been set up off-centered on the alignment table.

(9) Stop the table rotation when the level meter has deflected to the maximum on the plus side.

The level meter fluctuates from side to side

+1,000m -1,000m

The maximum position on the plus side Stop the table rotation at this position.

-1,000m +1,000m

No. 99MBB203A 3-5

(10) Manually shift the workpiece so that the level meter reading becomes half of the total deflection. (The figure blow shows a case in which the workpiece is shifted until the level meter reads close to +200m.)

+200m

TIP Tapping the workpiece slightly by such as the grip of a screwdriver will make it easy to shift the workpiece.

(11) Manually rotate the alignment table. The level meter deflection must have been reduced

(12) Repeat steps (8) through (10) if centering with a higher degree of accuracy is required. After the level meter deflection has been reduced sufficiently at the displayed magnification (1000m in the above case), increase the magnification for further adjustment. This step by step adjustment facilitates centering.

The procedure shown above is a rough-and-ready method for the manual centering of a workpiece.

To make centering with higher accuracy, use the centering/leveling function. (Refer to 5. Centering/Leveling Measurement for details.)

Screwdriver

Tapping slightly the workpiece by the grip of a screwdriver enables fine shift of the workpiece.

-1,000m

Shift the workpiece to reduce the meter deflection to half.

+1,000m

-200m +600m

Workpiece

-1,000m

The deflection has been reduced

+1,000m

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3. BASIC OPERATION

3.3 Performing Measurement/Analysis Using the Keys

to Call Conditions 3.3.1 What are the keys to call conditions for?

The keys to call conditions are keys used to register and call calibration ratio, centering/leveling conditions and measurement conditions.

Registered conditions can be called all together at once by pressing the key to call conditions. This saves the procedure of setting conditions otherwise needed for each time. Four keys 1 through 4 are available allowing four sets of conditions to be registered according to the workpieces to be measured.

Conditions that can be registered on the keys to call conditions are the following three kinds. Any combination of the following condition items can be registered:

(1) Calibration ratios

(2) Centering/leveling conditions

(3) Measurement conditions

*Refer to 7. Condition Registration for the procedures of registration of conditions on the keys to call conditions.

This chapter describes the procedures of performing measurement by automatically calling the conditions with the use of the keys to call conditions. Refer to 5. Centering/Leveling Measurement and 6. Measurement/Analysis for the procedures of manual setup of each condition.

the keys to call conditions

No. 99MBB203A 3-7

Measurement examples with the use of the keys to call conditions

NOTE To perform measurement with higher accuracy in the range of 100m or lower, take the following into consideration:

Slight fluctuation takes place in detector displacement immediately after the detector has been changed in orientation from the vertical to horizontal or vise versa or shifted along the X or Z-axis. So, allow dozens of seconds for the detector to stabilize before commencing measuring. When shifting the detector in the Z-axis direction, reciprocate the detector a few times in the vertical direction for running-in around a target position and finally stop the detector in position while shifting it upward. This reduces fluctuations that may take place immediately after the detector shifting

The effect of table speed fluctuation upon the start of table rotation can be reduced by commencing measurement well after the table has started rotation.

Consider as necessary the installation of a windbreak screen and/or vibration dumping stand.

3.3.1.1 When performing both the centering/leveling and measurement

Whether to register conditions on the keys to call conditions:

(1) Calibration ratio Register as necessary

(2) Centering/leveling condition Register

(3) Measurement condition Register

(1) After setting up the workpiece to be measured, press the key with which the conditions to be called have been registered.

(2) The calibration ratio registered with the key will be called. (If no calibration ratio has been registered, the current one will apply.)

(3) The registered centering/leveling conditions will be called with automatic switching to the display of the centering screen.

(4) Press the [START] key and perform the centering measurement . For details of centering procedures, refer to 5. Centering/Leveling Measurement.

(5) After the centering/leveling is over, press the [MEASURE] key to switch to the measurement screen.

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3. BASIC OPERATION

(6) Following the registered measurement conditions called on the screen, press the [START] key to perform measurement. For details of measurement/analysis procedures, refer to 6 Measurement/Analysis.

(7) Press the [RESULT] key to switch to the result screen for the display of the measurement results. Refer to 6. Measurement/Analysis for details of the result screen.

TIP Automatic switching to the result screen after measurement is enabled if [2: Automatic calculation [] has been selected in the Environment setup/ Automatic execution setup. Refer to 9.1 Automatic Execution Setup.

(8) Return to step (1) for measurement of the next workpiece. Return to step (6) for re-measurement of the same workpiece.

3.3.1.2 When performing measurement only

Whether to register conditions on the keys to call conditions:

(1) Calibration ratio Register as necessary

(2) Centering/leveling condition Register

(3) Measurement condition Register

(1) After setting up a workpiece, press the key with which the conditions to be called have been registered.

(2) The calibration ratio registered will be called. (If no calibration ratio has been registered, the current one will apply.)

(3) The registered measurement conditions will be called with automatic switching to the measurement screen.

No. 99MBB203A 3-9

(4) Press the [START] key and perform measurement. Refer to 6. Measurement/Analysis for details of measurement/analysis procedures.

(5) Press the [RESULT] key to switch to the result screen for the display of the measurement results. Refer to 6. Measurement/Analysis for details of result screen.

TIP Automatic switching to the result screen after measurement is enabled if [2: Automatic calculation []] has been selected in the Environment setup/Automatic execution setup. Refer to 9.1 Automatic execution setup.

(6) For measurement of the next workpiece, set up the next workpiece and return to step (4). Return to step (4) for re-measurement of the same workpiece.

3.3.1.3 Registering a single function

If only the calibration ratio or centering/leveling measurement condition has been registered with a key to call conditions, the key can be used to call a single function.

(1) When registered with only the calibration ratio

Pressing the key to call conditions will call a desired calibration ratio. If frequently used calibration ratio is registered with a key to call conditions, the key can be used to call the calibration ratio with one-key operation.

(2) When registered with only the centering/leveling conditions

Pressing the key to call conditions will call a desired centering/leveling condition with automatic switching to the centering screen. Switching to the centering screen, otherwise made from the menu screen, can be made with one-key" operation. Thus, the key registered with the centering/leveling conditions can be used as a key for switching to the centering screen.

No. 99MBB203A 3-10

3. BASIC OPERATION

3.4 Printing the Results Printing of measurement data and drawing is performed with the printer key.

3.4.1 Printing

Analysis results will be printed by pressing the [PRINT] key under the result screen.

Result printing is possible with the built-in printer or with an external printer (option) using the parallel output from the RA-120. Refer to 9.3 Instrument (RA-120 Hardware Setup) for procedures of switching the destination printers.

TIP If the [4: AUTO PRINT] has been enabled in the Environment setup/Automatic execution setup, the analysis results will be printed automatically upon switching to the result screen after measurement is over. (Refer to 9.1 Automatic Execution Setup.)

Print items can be set up with [4: Print items] in the Environment setup/Parameter setup. (Refer to 9.2 Parameter Setup.)

3.4.2 Paper feeding

Press the [Paper Feed] key and the built-in printer will feed the paper. Paper feeding continues as long as the key is kept depressed and will stop when the key is released.

TIP Refer to 10.2.2. Replacing the printer paper for how to replace the printer paper.

No. 99MBB203A 3-11

3.5 Saving the Measurement Results Measurement results can be output to files or to external equipment.

Refer to 8.1.2 Registering the result files or 8.4 Outputting Data for the procedures of measurement results output.

TIP Automatic execution setup has been enabled, automatic output is available for the analysis results upon switching to the result screen after measurement is over. (Refer to 9.1 Automatic Execution Setup.)

3.6 Turning off the RA-120 Press the power switch on the [] side to shut down the RA-120.

ON/OFF of the SD scale (option) does not interrelate with the power switch of the

RA-120 main unit. To save the battery of the SD scale, ensure that SD scale has been switched OFF before and after measurement. CAUTION

Do not turn off the power switch of the RA-120 during the operation of the turntable. This may cause instrument failure.

No. 99MBB203A 3-12

3. BASIC OPERATION

MEMO

No. 99MBB203A 3-13

4 CALIBRATION MEASUREMENT

4

4.1 Calibrating the Detector The RA-120 detects stylus displacement using a lever-type detector. If the stylus is replaced with one of a different length, the detector will detect a different displacement even though the stylus tip is displaced the same amount. Each time the stylus or detector is replaced, calibration (sensitivity adjustment) must be performed. The RA-120 has two calibration methods: static calibration and dynamic calibration.

TIP If [1: Startup calibration [O]] has been selected in Preferences Set/Auto-Execute setup, the calibration screen automatically appears after the power is turned on. (Refer to section9.1 "Setting auto-execution".)

4.1.1 Performing static calibration

Use the calibration film (standard accessory) for static calibration.

(1) Press the [CAL] key to display the Calibration screen.

(2) The most recent calibration conditions are displayed on the screen. Confirm the setup conditions of the following three items.

Meter sensitivity: 50m Calibration method: Static calibration Measuring orientation: Top face ( )

If the calibration conditions are not appropriate, press the [CHANGE] key to modify the setup conditions. (Refer to section 4.2 "Modifying the Calibration Screen Conditions".)

No. 99MBB203A 4-1

(3) Bring the stylus into contact with the top face of the alignment table (reference plane), then lower the detector until the s value on the LCD screen becomes approximately zero. Turn the jog dial for fine adjustment.

(4) Press the [ENT] key to enter the position (s value) on the reference plane.

(5) Insert the calibration film between the stylus and the reference plane, then press the [ENT] key.

The s value on the reference plane, entered in step 5, is

the calibration film

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4. CALIBRATION MEASUREMENT

(6) Check the calibration film thickness (C value) displayed on the screen. If the displayed value is different from the value given on the calibration film, adjust the displayed value to the correct value by turning the jog dial.

(7) Press the [ENT] key to enter the calibration film thickness (C value).

(8) The screen for confirming the calibration ratio to be registered is displayed. To register the calibration ratio, press the [ENT] key. To cancel registering it, press the [CANCEL] key.

(9) This completes the calibration procedure and returns the LCD screen to step (1).

This display example shows that the calibration ratio is registered as value CAL_A.

Turn the jog dial to change the C value.

No. 99MBB203A 4-3

4.1.2 Performing dynamic calibration

Measure the roundness of the Dynamic calibration master (optional accessory) for dynamic calibration.

(1) Position the Dynamic calibration master at the center of the alignment table.

(2) Bring the stylus into contact with the measuring face on the Dynamic calibration master. Adjust the alignment table so that the displayed stylus displacement is within the meter sensitivity range while turning the table. For detailed information about the centering procedure, refer to section 5 "CENTERING/LEVELING MEASUREMENT".

(3) Press the [CAL] key to display the Calibration screen.

Dynamic calibration master

No. 99MBB203A 4-4


(4) The most recent calibration conditions are displayed on the screen. Confirm the setup conditions of the following two items.

(5) Press the [START] key to start measurement. When measurement has been completed, the roundness of the Dynamic calibration master is automatically calculated and displayed.

(6) Check the Dynamic calibration master roundness (C value) displayed on the screen. If the displayed value is same as the roundness of the Dynamic calibration master, press the [ENT] key. If the displayed value is different from the roundness of the Dynamic calibration master, adjust the displayed value to the correct value by turning the jog dial, then press the [ENT] key.

(7) The screen for confirming the calibration ratio to be registered is displayed. To register the calibration ratio, press the [ENT] key. To cancel registering it, press the [CANCEL] key.

(8) This completes the calibration procedure and returns the LCD screen to step (1).

Calibration method: Dynamic calibration Measuring orientation: External side face. ( ) The calibration conditions differ depending on the Dynamic calibration master to be used. To modify the setup conditions, press the [CHANGE] key. (Refer to section 4.2 "Modifying the Calibration Screen Conditions".)

Turn the jog dial to change the C value.

This display example shows that the calibration ratio is registered as the CAL_A value.

No. 99MBB203A 4-5

4.2 Modifying the Calibration Screen Conditions This section explains the procedure for modifying the various conditions of static calibration and dynamic calibration that are displayed on the Calibration screen.

TIP This modification can only be made if the Calibration screen is displayed. The conditions that can be set up differ depending on the calibration method.

4.2.1 Switching between Static and Dynamic Calibrations

(1) Press the [CHANGE] key to unlock the setup conditions.

(2) Turn the jog dial to move the cursor to the calibration method, then press the [ENT] key.

(3) Turn the jog dial to select one of the calibration methods, then press the [ENT] key. Either of the following two calibration methods can be selected:

Static calibration Dynamic calibration

(4) Press the [CHANGE] key to lock the setup conditions.

No. 99MBB203A 4-6


4.2.2 Modifying the static calibration conditions

The following two setup conditions for static calibration can be modified.

Measuring orientation Calibration ratio

Calibration ratio

Measuring orientation

TIP The cursor moves in the following directions when the jog dial is turned. Measuring orientation Calibration ratio Calibration method

: Clockwise rotation of the jog dial : Counterclockwise rotation of the jog dial

4.2.2.1 Modifying the measuring orientation


(2) Check the measuring orientation of the detector stylus. (Refer to section 2.2.2 "Mounting the detector".)

(3) Confirm that the cursor is positioned at the current measuring orientation setting, then press the [ENT] key. If the cursor is not positioned correctly, turn the jog dial to move to the measuring orientation setting.

(4) The option screen is displayed. Turn the jog dial to select a measuring orientation that is identical to the stylus orientation, then press the [ENT] key.

No. 99MBB203A 4-7

(5) The setup conditions of other items can be successively modified. To terminate the modification operation, press the [CHANGE] key to lock the setup conditions.

NOTE Be sure that the measuring orientation corresponds to the actual stylus orientation. If the set measuring orientation differs from the stylus orientation, a correct stylus displacement cannot be detected.

4.2.2.2 Modifying the calibration ratio

TIP A calibration ratio is a gain adjustment ratio by which a stylus displacement is multiplied. Four kinds of calibration ratios have been registered. Those ratios can be used if, for example, the current stylus is replaced with a different stylus.


(2) Turn the jog dial to move the cursor to the calibration ratio setting, then press the [ENT] key.

(3) The option screen is displayed. Turn the jog dial to select a desired calibration ratio, then press the [ENT] key.


No. 99MBB203A 4-8


4.2.3 Modifying the dynamic calibration conditions

The following five dynamic calibration setup conditions can be modified.

Measuring orientation Calibration ratio Filter type Cutoff value Calculation method

Measuring orientation

Filter type Cutoff value

Calculation method

Calibration ratio

TIP The cursor moves in the following directions when the jog dial is turned. Measuring orientation Filter type Cutoff value Calculation method Calibration ratio Calibration method

: Clockwise rotation of the jog dial : Counterclockwise rotation of the jog dial

4.2.3.1 Modifying the measuring orientation

Use the same procedure given in "4.2.2.1 Modifying the measuring orientation".

4.2.3.2 Modifying the calibration ratio

Use the same procedure given in "4.2.2.2 Modifying the calibration ratio ".

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4.2.3.3 Modifying the filter type


(2) Turn the jog dial to move the cursor to the filter type setting, then press the [ENT] key.

(3) The option screen is displayed. Turn the jog dial to select a desired filter type, then press the [ENT] key. For detailed information, refer to section 11.2.2, "Filter types".


4.2.3.4 Modifying the cutoff value

TIP If the filter type has been set to [NON], no cutoff value can be selected.


(2) Turn the jog dial to move the cursor to the cutoff value setting, then press the [ENT] key.

(3) The option screen is displayed. Turn the jog dial to select a desired cutoff value, then press the [ENT] key. For detailed information, refer to section 11.2.1, "About cutoff values".


No. 99MBB203A 4-10


4.2.3.5 Modifying the calculation method


(2) Turn the jog dial to move the cursor to the calculation method setting, then press the [ENT] key.

(3) The option screen is displayed. Turn the jog dial to select a desired calculation method, then press the [ENT] key. For detailed information, refer to section 11.1.1, "Roundness Evaluation Methods".


No. 99MBB203A 4-11

MEMO

No. 99MBB203A 4-12

5 CENTERING/LEVELING MEASUREMENT

5

5.1 Centering/Leveling To perform measurement with high accuracy, it is necessary to accurately carry out centering and leveling and correctly set up a workpiece to be measured in place. This is an important work especially when performing measurement with a higher magnification.

Centering

"Centering" is an alignment procedure for bringing the center of a measured cross-section contour close to the axis of rotation of the alignment table so that stylus deflection does not exceed the detecting range of the detector.

Leveling

"Leveling" is an alignment procedure for adjusting the tilt of the alignment table so that a measured cross-section contour may approach a circle. If the axis of a cylindrical workpiece is tilted with respect to the rotational axis of the alignment table, the measured profile will form an ellipse. This is critically detrimental to obtaining a correct measurement.

Centering Leveling

No. 99MBB203A 5-1

To perform centering/leveling measurement efficiently, the following four kinds of measurement procedures are provided.

Single cross-section measurement for centering: Determines a centering amount from one-cross-section data.

Dual cross-section measurement for centering/leveling: Determines both centering and leveling amounts from two-cross-section data.

Single plane measurement for leveling: Determines a leveling amount from one-plane data.

Dual cross-section measurement for leveling: Determines a leveling amount from two-cross-section data.

Also, two methods of measurement data input are available: full-circumference input and multi-point input. This manual explains measurement based on the full-circumference input.

5.1.1 Setting a workpiece

The measuring range of the RA-120 detector is 1mm (.04"). Therefore, it is necessary to set the workpiece on the alignment table so that the stylus deflection is within the 1mm (.04") range.

NOTE Before setting a workpiece on the alignment table be sure to confirm that the rated air pressure has been supplied to the system.

(1) The adjustable range of the centering (CX and CY) knobs is 3mm (.12"). Confirm that the rotary position of each knob is not off-center (it should be centered at the adjustable range).

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5. CENTERING/LEVELING MEASUREMENT

(2) Use the concentric circles scribed on the table to position a workpiece on the alignment table so that the cross section to be measured comes as close as possible to the table center.

Concentric circle

(3) Bring the stylus close to a measurement cross-section contour and then turn the alignment table to check the deflection of the cross-section contour. If the deflection exceeds 1mm(.04"), adjust the alignment table position according to the following procedure.

1mm or less

No. 99MBB203A 5-3

(4) Place the centering CX knob in the position shown in the figure at the left, then check the clearance between the stylus and the measurement cross-section contour. Turn the alignment table 180 to place the CX knob in the position shown in the figure at the right, and then again check the clearance between the stylus and the measurement cross-section contour. Turn the CX knob to adjust the alignment table position so that the difference between the clearances in the original position and the post-180 rotation position of the table is halved.

Centering CX knob

(Gap check)

(Adjustment)

(Turn 180 degrees)

Halve the gap

No. 99MBB203A 5-4


(5) Place the centering CY knob in the same position the CX knob was placed, as in the above left figure, and then adjust the alignment table position using the same procedure in step (4).

(6) This completes the workpiece setting procedure. Advance to section 5.1.2 "Measuring the centering/leveling amounts".

5.1.2 Measuring the centering/leveling amounts

5.1.2.1 Single cross-section contour measurement for centering

Measure a given cross-section contour of a workpiece to determine the centering amounts (CX, CY) (difference between the center of the cross section and the rotation axis of the alignment table).

(1) Press the [CENTERING] key to display the Centering screen.

No. 99MBB203A 5-5

(2) The most recent centering conditions are displayed. Confirm the setup conditions.

(3) Bring the stylus into contact with a measurement position.

(4) While turning the alignment table, adjust the detector position with the arm feed knob so that the stylus displacement display is within the meter sensitivity range. Turn the jog dial for fine adjustment and perform zero shifting.

(5) Press the [START] key to start measurement. When the measurement has been completed, the centering amounts are automatically calculated and displayed.

(6) Advance to section 5.1.3 "Adjusting the centering/leveling amounts".

To modify the setup conditions, press the [CHANGE] key. (Refer to section 5.2 "Modifying the Centering Screen Conditions".)

The centering conditions differ depending on the workpiece to be measured.

Centering method: Centering (1 Side)

No. 99MBB203A 5-6


5.1.2.2 Single plane measurement for leveling

Measure a given plane of a workpiece to determine the leveling amounts (LX, LY) (tilt of the measurement plane with respect to the top face on the alignment table).



(3) Bring the stylus into contact with a plane on a workpiece.

(4) While turning the alignment table, adjust the detector position with the up/down feed knob so that the stylus displacement display is within the meter sensitivity range. Turn the jog dial for fine adjustment and perform zero shifting.

(5) Press the [START] key to start measurement.

To modify the setup conditions, press the [CHANGE] key. (Refer to section 5.2 "Modifying the Centering Screen Conditions ".)


Centering method: Horiz. Cent. (1 Plane)

No. 99MBB203A 5-7

(6) After completing measurement, turn the jog dial to enter the distance from the alignment table center (radius X), then press the [ENT] key.

(7) When the measurement has been completed, the leveling amounts are automatically calculated and displayed.


No. 99MBB203A 5-8


5.1.2.3 Dual cross-section contour measurement for leveling

Measure two given cross-section contours of a workpiece to determine the leveling amounts (LX, LY) (tilt of the axis passing through the two cross sections with respect to the rotation axis of the alignment table).



(3) Bring the stylus into contact with the first measurement position (cross-section contour) on a workpiece.



Centering method: Horiz.Cent. (2 Side)

To modify the setup conditions, press the [CHANGE] key. (Refer to section 5.2 "Modifying the Centering Screen Conditions ".)


No. 99MBB203A 5-9

(6) Enter the height (Z value) of the first cross-section contour. The height (Z value) of the measured position is automatically input.

NOTE To measure the height of a cross-section contour, use a caliper, etc.

(7) Bring the stylus into contact with the second measurement position (cross-section contour).

(8) To measure the second cross-section contour, repeat the procedures in step (4) to step (6).

(9) When the two cross-section contours have been measured, the leveling amounts are automatically calculated and displayed.


No. 99MBB203A 5-10


5.1.2.4 Dual cross-section contour measurement for centering/leveling

Measure two given cross-section contours of a workpiece to determine the leveling amounts (LX, LY) (tilt of the axis passing through the two cross sectioncenters with respect to the rotation axis of the alignment table) and the centering amounts (CX, CY) (difference between the axis passing through centers of the two cross sections and the rotation axis of the alignment table) at the same time.



To modify the setup conditions, press the [CHANGE] key. (Refer to section 5.2 "Modifying the Centering Screen Conditions".)


Centering method: HorizCent + Cent (2 Side)

No. 99MBB203A 5-11

NOTE Before starting measurement, lower the detector one time until the stylus tip is at the same height as that of the table top face. Check that the SD scale display indicates 0.00mm/.0000". If other than zero is indicated, reestablish the origin point referring to the section of origin setting of 2.2.7 Setting up SD scale.

(3) Bring the stylus into contact with the first measurement position (cross-section contour) on a workpiece.



(6) Enter the height (Z value) of the first cross-section contour. The height (Z value) of the measured position is automatically input.

NOTE Be sure to enter a height from the top face on the alignment table.

To measure the height of a cross-section contour, use a caliper, etc.

(7) Bring the stylus into contact with the second measurement position (cross-section contour).

(8) To measure the second cross-section contour, repeat the procedures in step (4) to step (6).

No. 99MBB203A 5-12


(9) When the two cross-section contours have been measured, the leveling amounts and centering amounts are automatically calculated and displayed.


No. 99MBB203A 5-13

5.1.2.5 Multi-point measurement for centering/leveling

Measure given multiple points on a cross-section contour instead of measuring the entire contour of the cross section to determine the centering amounts and leveling amounts. This method is effective especially for centering and leveling notched workpieces.



(3) Bring the stylus into contact with a workpiece.


(5) Press the [START] key to start multi-point measurement.

The centering conditions differ depending on the workpiece to be measured. To modify the setup conditions, press the [CHANGE] key. (Refer to section 5.2 "Modifying the Centering Screen Conditions".)

Number of input points: 10 Point

Centering method: M-Point

No. 99MBB203A 5-14


(6) Turn the alignment table to set the stylus in the first measurement position, then press the [ENT] key.

(7) Repeat the procedure in step (6) for the required number of points (at least 3 points).

(8) To determine the value for leveling, enter the value of height (Z value) or radius (X value) of the first cross section.

(9) To perform dual cross-section contour measurement for centering/leveling, move the stylus to the second cross-section contour, and then repeat the procedure in step (4) to step (8).

(10) When all the measurement points have been entered, the centering amounts and leveling amounts are automatically calculated and displayed.


In this example, 6 measurement point positions are to be entered.

This angle shows that of the alignment table of the current measurement position. "" indicates the measurement position that has just been entered.

No. 99MBB203A 5-15

5.1.3 Adjusting the centering/leveling amounts

This machine is supporting two methods, [Detector method] and [D.A.T. (Digital Adjustable Table) method], to perform the centering and leveling of a workpiece simply and speedily.

Detector method

Adjusting method by turning the centering knobs (CX, CY) and the leveling knobs (LX, LY) while monitoring the adjustment value and the displacement of the detector displayed on the LCD screen.

D.A.T. method

Adjusting method by turning th

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Ra 120 Manual Usuario Ingles Ba126501

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