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Lesson 3: Prismatic Milling
Objectives
Through completing the exercises in this lesson, you will be able to:
Section Topic Exercise
3.1 Create Stock Exercise 1 - Creating Stock
3.2 Manufacturing Environment Exercise 2 - Starting a New
Machining Sequence
3.3 Select and Create Tools Exercise 3 - Creating a New Tool
3.4 Face Milling Operation Exercise 4 - Face Milling
Operation
3.5 Viewing the Toolpath
3.6 Editing a CAM Instruction Exercise 5 - Editing a CAM
Instruction
3.7 Profiling Operation Exercise 6 - Profiling Operation
3.8 Roughing Operation Exercise 7 - Roughing Operation
3.9 Machining Holes Using the Drill
Cycle
Exercise 8 - Drill Cycle
3.10 Moving/Copying/ Inserting a
Machining Instruction
Exercise 9 - Moving and Inserting
CAM Instructions
3.11 Flat Land Finishing Exercise 10 - Flat Land Finishing
Operation
Use the right-hand column to tick off those lessons or exercises you have completed.
Before You Start
Before you begin work on the following exercises, make sure that you display the
following toolbars on the screen:
Standard toolbar, Main toolbar.
Tooling toolbar, Edit Toolbar.
Input Options Toolbar, Browser window.
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Overview of the Lesson In this lesson, you will learn the milling techniques required to machine the following
component:
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Lesson 3.1 - Creating Stock Page 3 of 29
Lesson 3.1 - Creating Stock Before you can machine a component, you would typically create the stock to represent
the material (or billet). The stock envelops the component outline and is used in
EdgeCAMs Simulator to display the removal of material as the machining instructions
are simulated.
Exercise 1 - Creating Stock
1. Open the component „Packing Adapter_Metric.ppf''. The image should look like
this:
2. Select the Stock/Fixture option from the Geometry menu. You see the Stock
dialogue.
3. Enter the following stock specifications:
automatic Stock checked Shape Box
X & Y Offsets 5mm Z Max offset 5mm
Z Min offset 15mm Layer Stock
Color White
4. Save the Part as „Packing Adapter_Metric.ppf‟ to your X:\ drive.
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Lesson 3.2 - Manufacturing Environment EdgeCAM manufacture mode allows you to specify tooling and machining commands to
manufacture components.
The first time you enter manufacture mode, you must enter details on the type of
machining you want to perform, for example milling or turning. The first dialogue is the
Machining Sequence dialogue:
Exercise 2 - Starting a New Machining Sequence
1. Ensure the part file „Packing Adapter_metric.ppf‟ is opened.
2. Select the Manufacturing Icon.
3. If this is the first time you have used the Manufacturing Environment - you will see
the Machining Sequence dialogue box.
4. Fill in the following parameters:
Sequence Name „First Operation‟
Discipline „Mill‟
Initial CPL „Top‟
Machine Tool „pf-3x-mc.mcp‟
All remaining modifiers can be ignored.
5. Dismiss the Dialogue box by selecting „OK‟.
6. You may edit any of the above information by clicking the right-hand mouse button
over the Sequence Name in the Instructions Browser and select „Edit‟.
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The ‘Sequence Window’ displays a list of manufacturing commands. You can copy, move, edit and delete commands within this ‘Window’.
7. You will observe the following dialogue box:
8. The above information can be altered at any time during the Manufacturing
procedure.
Lesson 3.3 - Creating CAM Instructions Essentially, you have two methods of creating machining instructions in EdgeCAM.
Firstly you may adopt a „Manual‟ method which relies entirely on the users‟ knowledge
and skill of the software. Each individual CAM instruction will be created by the user.
Alternatively, you can choose to work in a more „Automated‟ manner which allows the
software to make more machining decisions for you and the physical creation of each
CAM instructions are faster.
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Machining Process for Packing Adapter Component
Exercise 3 - Creating a New Tool
In this exercise, you will create a new tool, which will be used during the machining
process, on the current component. Specifically, the tool is a 40mm dia. Face Mill. The
tool will be used to remove surplus stock material from the component.
1. Before proceeding ask Mr. Carron to setup your ‘TOOLSTORE DATABASE’.
2. We wish to create a permanent record of this item within the ToolStore. Select the
„ToolStore’ icon.
3. Filter the current amount of tools on display by selecting „Facemill‟.
4. Create a new “40mm Face mill” - select “Create”.
Process CAM Instruction
Work Content Tool Description Tool No.
1 Facemill
Operation
Face off component 40mm x 15° Approach Facemill 1
2 Profiling
Operation
Rough-out external
features
40mm Dia. Endmill - Long Series 2
3 Roughing
Operation
Rough-out two
Pockets
16mm Dia. Solid Carbide Endmill - Long
Series
3
4 Hole Cycle Drill Through 2 x
8mm Dia. holes
8mm dia. HSS Drill 4
5 Hole Cycle Counterbore the 2 -
8mm holes
16mm dia. Flat bottom “peg” drill or Slot
drill
5
6 Flatland
Finishing
Operation
Finish and „size‟
both Pocket
Features
12mm dia. standard Endmill 6
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5. Enter the tool Description - „40mm Face Mill‟.
6. Enter the following values in the „Geometry‟ tab.
Face Mill specifications:
Diameter 40mm
Flute length 10mm
Hand of Tool Right
Included angle 15°
teeth/flutes 5
Shank Length & Diameter 15mm
What happens by default if you do not enter a shank diameter?
4. Rotate and Pan the image of the Face Mill. Double click the left-hand mouse key in
the Graphics port to Zoom Extents the image of the Tool.
5. The tool should now be displayed. Select „Cancel‟ to exit the ToolStore.
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Lesson 3.4 - Face Milling Operation In this lesson, you will learn how to use the basic 2½D milling CAM instructions to
machine the component. Furthermore, you will learn how to Simulate the machining
sequence- using EdgeCAM Simulator.
Process One
Process CAM Instruction
Work Content Tool Description Tool No.
1 Facemill
Operation
Face off component 40mm x 15° Approach Facemill 1
Exercise 4 - Face Milling Operation
The first step in milling the example part is to prepare the top surface of the component
before using any other machining processes. You can facemill the top area of a
component.
Face mill can be performed manually by using Rapid & Feed movements. However, it is
obviously better to employ EdgeCAMs commands - in this instance Facemill Operation.
1. Select the Face Mill Operation either form the menu, or from the toolbar.
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2. Observe the command prompt - ‘Select Boundary Entities (Finish for None)’ Re-act
to the prompt by the chaining the 2D profile representing the stock.
3. You will now observe an interactive dialogue box, which runs a „video‟ of the tool
movements. As you tab through the various commands, the display will be altered in
order to allow the user to visualize the influence of that particular command.
4. Digitize the „?‟ symbol - EdgeCAM will display a miniature „Help‟ menu which will
allow the user to fully interpret the command.
5. Assign the following General Parameters:
Mill Type Climb Angle 0º %Stepover 65
Lead Length 25mm Stock Offset 0mm
6. Assign the following Tooling Parameters:
Select „Find’ and choose the 40mm Face Mill
Position 1
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7. Assign the following Depth Parameters:
Clearance 20mm Level 5mm
Depth -5mm Cut Increment 2.5mm
8. Dismiss the dialogue box by selecting „OK’.
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Lesson 3.6 - Profiling Operation Page 11 of 29
Lesson 3.5 - Editing a CAM Instruction
Exercise 5 - Editing a CAM Instruction
1. Observe the Sequence Window, containing the CAM Instructions. Select the „+‟
symbol alongside the Face Milling Operation.
Why do you think the Face Mill Operation has selected miscellaneous functions such as Coolant and Spindle commands? Investigate what influence does the ‘Operation Preferences’ have over the Face Mill Operation.
2. If you are not entirely satisfied with the toolpaths produced by the Face Mill
Operation you may edit the operation. Position the cursor over the entry called „Face
Mill Operation‟ and click the right mouse button - select „Edit‟ you will observe the
following dialogue box.
3. If you check the „Coord Input‟ box, you will be offered the opportunity to reselect
CAD geometry. Ignoring the „Coord Input‟ box and selecting „OK‟ - you will be
offered the opportunity of re-specifying the various information that was originally
entered into the Face Mill Operation dialogue box.
4. Try changing some of the original data:
Mill Type Climb Stepover 25%
Angle 45° Cut Increment 2mm
Lead Length 25mm
5. Select „OK‟ to dismiss the Dialogue Box and observe the alterations in the toolpaths.
Observe how the Operation
contains individual CAM
instructions.
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Viewing the Operation
6. Expand the Face Mill Operation by digitizing the „+‟ symbol. Place the cursor over
the CAM instruction called „Face Milling‟ and click the right hand mouse button.
Select „Edit‟ from the drop-down menu. You are now specifically editing the
individual cycle.
7. Observe the numerous commands contained within the dialogue boxes - in particular
look at the Lead parameters.
Do Not alter any of the information found within the Dialogue boxes.
8. If we had chosen to create our CAM instructions using the „Manual‟ method we
would have used a Face Milling Cycle.
9. Dismiss the dialogue box by selecting ‘CANCEL’.
When viewing CAM Instructions and parameters born out of an Operation - you must dismiss the dialogue box by the ‘Cancel’ command. Otherwise you will ‘Collapse’/’Explode’ the Operation.
10. Select „Preferences’ from the Operations Menu.
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11. Activate the „Disable M-Functions’ command.
Operation Preferences influence the behavior of the CAM instructions (and its toolpaths) created from an Operation.
12. Save the file. If you have already saved the file you will not be prompted for a
file name nor Folder.
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13. Activate the „Last‟ option found in the Mode command (View Menu). This will have
the effect of allowing EdgeCAM to only display the last toolpath and thus make the
screen less cluttered.
Lesson 3.6 - Profiling Operation
Exercise 6 - Profiling Operation
Process CAM Instruction
Work Content Tool Description Tool No.
2 Profiling
Operation
Rough-out Outside
Profile
40mm Dia. Endmill - Long Series 2
The next stage is to rough out the surplus material found on the outer regions of the
component. There are obviously several methods that could execute this work - the
Profiling Operation is one of several options.
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Lesson 3.6 - Profiling Operation Page 15 of 29
1. Select „Profiling Operation‟ from the Operation Menu.
The characteristic of all Operations is determined by the ‘Preferences’ settings.
2. Observe the command prompt „Digitize Profiles’ - chain the outer profile of the
component. Move through to the next command prompt by clicking the Right-hand
mouse button.
3. Observe the command prompt „Digitize new Start Point for Profile Chain’
EdgeCAM is offering you the opportunity to determine the entry/exit point of the
cutter in relationship to the profile. As you left-hand mouse key click around the
profile, notice how the arrow symbol is positioned. Move through to the next
command prompt by clicking the Right-hand mouse button.
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4. You may ignore the final command prompt - „Select Boundary Entities (Return for
None’) - by clicking the Right hand mouse button.
5. You will now observe an interactive dialogue box, which runs a „video‟ of the tool
movements. As you tab through the various commands, the display will be altered
in order to allow the user to visualize the influence of that particular command.
6. Digitize the „?‟ symbol - EdgeCAM will display a miniature „Help‟ menu which
will allow the user to fully interpret the command.
.
Mill Type Climb Mill
Tolerance 0.01mm
Offset 0mm
Compensation Geometry
None - no compensation G Codes are placed in the CNC program. The X & Y
positional output within the program is based on the tools centerline.
Centerline - as above expect compensation G Codes are placed in the CNC
Program.
Geometry - The X & Y positional output within the program is based on the
geometry of the profile. Compensation G Codes are placed in the CNC
Program.
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Lesson 3.6 - Profiling Operation Page 17 of 29
Lead Radius 4mm
The tool will “Roll” into the sidewall of the profile as it enters the cut.
7. Move onto the „Tooling‟ Tab.
Position 2
Select the „Find’ button and browse the ToolStore - selecting „40mm End
Mill‟.
8. Move to the „Depth’ Tab
Clearance 5mm Level 0mm
Depth -33mm Cut Increment 10mm
Cusp blank
Lead Radius - radius compensation is
applied along the Lead In section of the
toolpath.
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9. Dismiss the dialogue box by selecting „OK’.
10. Observe the resultant toolpath - referring to the previous exercise, use the Simulate
Toolbar to „play‟ and view the toolpaths.
11. Open the „Simulator‟ and observe the toolpaths.
When the Simulator is launched, select the Start icon from the toolbar:
You can change the speed by adjusting the speed slider bar:
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Quit the Simulator and return to EdgeCAM.
Refer to ‘Lesson 4.2 - EdgeCAM Simulator’ section of this training guide for information about the Simulator software.
12. Observe the Sequence Window, containing the CAM Instructions. Select the „+‟
symbol alongside the Profiling Operation.
Why do you think that the Profiling Operation has selected the Tool Change command?
13. If you are not entirely satisfied with the toolpaths produced by the Profiling
Operation you may edit the operation. Position the cursor over the entry called
„Profiling Operation‟ and click the right mouse button. You will observe the
following dialogue box.
Observe how the Operation
contains individual CAM
instructions.
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14. If you check the „Coord Input‟ box, you will be offered the opportunity to reselect
another Feature or Profile. Ignoring the „Coord Input‟ box and selecting „OK‟ - you
will be offered the opportunity of re-specifying the various information that was
originally entered into the Profiling Operation dialogue box.
Viewing the Operation
15. Expand the Profiling Operation by digitizing the „+‟ symbol. Place the cursor over
the CAM instruction called „Profiling‟ and click the right hand mouse button. Select
„Edit‟ from the drop-down menu. You are now specifically editing the individual
cycle.
16. Observe the numerous commands contained within the dialogue boxes - in
particular look at the Start/End parameters.
Do Not alter any of the information found within the Dialogue boxes.
17. If we had chosen to create our CAM instructions using the „Manual‟ method we
would have used a Profiling Cycle.
18. Dismiss the dialogue box by selecting ‘CANCEL’.
When viewing CAM Instructions and parameters born out of an Operation - you must dismiss the dialogue box by the ‘Cancel’ command. Otherwise you will ‘Collapse’/’Explode’ the Operation.
19. Re-Save the part.
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Lesson 3.7 - Roughing Operation
Process CAM Instruction
Work Content Tool Description Tool No.
3 Roughing
Operation
Rough-out two
Pockets
16mm Dia. Solid Carbide Endmill - Long
Series
3
Exercise 7 - Roughing Operation
Now that you have experienced setting up an Operation - you should find the next
exercise slightly easier.
Remember, an Operation is creating the CAM instructions for you. You will be shown later on how to create these Instructions manually.
1. From the Operation menu, select „Roughing‟. Observe the command prompt
„Digitize Geometry to machine’ - Chain both pocket profiles.
Think - what CAM instructions are created by the Roughing Operation?
2. Observe the next command prompt „Select Boundary Entities (Finish for None)‟
You may ignore this prompt - a boundary is only used when you wish to restrict the
positions of the toolpath.
3. Observe the „Video‟ window and read the interactive Help. Set the following
modifiers:
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Mill Type Climb %Stepover 50%
Offset 1mm Z Offset 0mm
Tolerance 0.1mm
The value inputted for ‘Offset’ is 3D - applied to X,Y & Z axis.
4. Move into the „Tooling‟ tab and set the following.
Tool Number 3
Tool Type 16mm Long Series End Mill
5. Move into the „Depths‟ tab and set the following:
Clearance 5mm Level 0mm
Depth -15mm Cut Increment 5mm
6. Dismiss the dialogue box by selecting „OK’.
7. Observe the resultant toolpath - referring to the previous exercises, use the Simulate
Toolbar to „play‟ and view the toolpaths.
8. Open the „Simulator‟ and observe the toolpaths.
Refer to ‘Lesson 4.2 - EdgeCAM Simulator’ section of this training guide for information about the Simulator software.
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9. Observe the Sequence Window, containing the CAM Instructions. Select the „+‟
symbol alongside the Roughing Operation.
Consider why EdgeCAM has created a ‘Move to Too Change’.
10. Re-Save the Part.
Lesson 3.8 - Machining Holes Using the Hole Cycle You can produce different drilled hole specifications by selecting the appropriate tool
and specifying the relevant modifiers for the cycle. For example, you can create a main
hole and its countersink by creating two hole cycles, each with different tool, depth and
dimension specifications.
The method described herein represents the ‘Manual method’ of creating CAM instructions. Therefore, unlike the previous exercises - you will not be using Operations.
Process Four
Process CAM Instruction
Work Content Tool Description Tool No.
4 Hole Cycle Drill Through 8mm dia. HSS Drill 4
5 Hole Cycle Counterbore the 2 -
8mm holes
16mm dia. Flat bottom “peg” drill or Slot
drill
5
Exercise 8 - Drilling the Holes
Complete machining of the drilled and counter bored holes.
You will now learn how to create a Hole cycle. For this particular component, you will
have to produce two cycles to completely machine the drilled hole feature.
Drill - through the component with a 8mm dia. HSS Drill.
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Counterbore - 16mm Dia. X 5mm deep with a 16mm Slot Drill .
1. The Endmill from the previous machining instructions requires placing back in the
tool carousel/turret. Execute a Toolchange command.
Consider why it wasn’t necessary to use a ‘Toolchange’ command during the previous machining transactions.
2. Define/select tool number four - 8mm diameter drill.
3. Open the Hole Cycle Command. You see the Hole Cycle dialogue:
4. Set the following Parameters:
Subroutines Controller Longhand No
Feature Name Holes Optimize Path None
5. Set the Depth Parameters:
Clearance 10mm Level 0mm
Depth -35mm
Use „Feature Name‟ in order to
lessen the amount of digitizing.
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Multilevel and Multi Depth are used where the same Drill is to be used on various holes features each possessing different Level and depth.
6. Step parameters are used when Peck Drill or Deep Hole Drilling Cycles are required.
7. Filtering can be used for refining the cycles. For instance where a drawing possesses
numerous arcs that represent hole positions, one can force the cycle to drill arc
entities that match the drill diameter.
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8.
9. Dismiss the Dialogue box by selecting „OK‟ The command prompt will read „
Digitize location for hole centre‟ In the case of the component in hand, select the
centre point(s) of the arc(s) you want to drill, then right-click to end the hole
command.
Use Intellisnap to guarantee that you have selected the correct position.
To select the centre of an arc, position the cursor over the arc centre and wait until the
„Entity Tooltip‟ appears. Select the Centre-point option from the shortcut menu, then left
hand click to select the required position.
Refer to Getting Started with EdgeCAM Lesson 2.5 ‘Selecting Entities’.
9. Having digitized the two positions, EdgeCAM creates and displays the toolpath(s) for
the hole cycle.
10. Move the Tool to the Tool change position.
11. Save the file. If you have already saved the file you will not be prompted for a
file name nor a Folder.
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Process Five
Process Cycle Work Content Tool Description Tool No.
5 Drill Counterbore the 2 -
8mm holes
16mm dia. Flat bottom “peg” drill or Slot
drill
5
12. Select or create a 16mm End Mill.
13. Create a second Hole Cycle - Pay special attention to the depth modifiers.
14. Remember to use Feature Name. EdgeCAM will remember the name used in the
previous hole drilling cycle. On this occasion you will not have to digitize the hole
centers:
15. Move the drill back to the toolchange.
position.
Lesson 3.9 - Moving/Copying/ Inserting a Machining Instruction
Exercise 9 - Moving and Inserting CAM Instructions
Moving a CAM Instruction
The following information will demonstrate how to create further CAM instructions
AFTER a machining process has been completed.
The method used to move and copy a CAM instruction is identical to that used in
Microsoft©. Windows® Explorer for move Files and/or Folders.
1. Position the Cursor over the target CAM Instruction, click the left hand mouse
button and hold the button down. Using the “Drag and Drop” method, slide the
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mouse/cursor up and down the CAM Browser. You will observe a black line
appearing, this indicates the new position for the instruction.
2. Release the Left Hand mouse button the CAM Instruction is moved/Copied.
To Copy a CAM instruction, repeat the above procedure whilst holding down the ‘Control’ Key.
Inserting a CAM Instruction
To Insert a CAM instruction:
3. Right-hand mouse key click over an Instruction and select „Insert‟.
4. An arrow marker will appear next to the instruction. All new instructions will be
placed Before the „marked‟ instruction.
5. Having created the new CAM Instructions - switch off „Insert‟ by right hand click
over the CAM Instructions, and un-check „Insert‟.
Lesson 3.10 - Flat Land Finishing Operation
Process Six
Process CAM Instruction
Work Content Tool Description Tool No.
6 Flatland
Finishing
Operation
Finish and „size‟
both Pocket
Features
12mm dia. standard Endmill 6
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Exercise 10 - Flat Land Finishing Operation
Flat Land Finishing Operation
The Flat Land Finish cycle is capable of finish machining the base and sides of the two
pocket features. Without this cycle, one would have had to use a Roughing cycle (with
the cut increment deactivated) plus a Profiling cycle.
The exercise herewith uses the automatic method of creating CAM instructions. Therefore, you will use the Flat Land Finishing Operation.
1. Select Flat Land Finishing Operation from the Operations Menu.
2. Observe the command prompt - „Digitize Geometry to machine’ - chain the two
profiles that represent the pockets.
3. Ignore remaining prompts.
4. Set the Step-Over 35% and select a 12mm Dia. Endmill from the ToolStore
5. Set the Depth parameters to:
Clearance 5mm Level 0mm Depth -15mm
6. Observe how the tool machines the surplus material on the base of the pockets as
well as the side walls.
7. Re-Save the part as „Packing Adapter.ppf‟.