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8/10/2019 CNC Turning Edited
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8/10/2019 CNC Turning Edited
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CNC Latheis especially useful in contour turning
operations and precise machining.
to adjust the CNC lathe for a different part
to be machined requires a simple change
in the computer program and, in some
cases, a new set of cutting tool.
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Operations using CNC LathePlain Turning
Transversal Turning
Boring
Reaming
Tapering
Angular
Profile
Drilling
Tapping
Threading
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PROBLEM PROBABLE CAUSE
Tool breakage Tool material lacks toughness, improper tool angles,
machine tool lacks stiffness, machining parameters
too high.
Excessive tool wear Machining parameters too high, improper toolmaterial, ineffective cutting fluid, improper tool angles.
Rough surface finish Built-up edge on tool, feed too high, tool too sharp,
vibration and chatter.
Dimensional variability Lack of stiffness of machine tool and work holdingdevices, excessive temperature rise, tool wear
Tool chatter
Lack of stiffness
Tool chatter Lack of stiffness of machine tool and work holding
devices, machining parameters are not set properly.
General Troubleshooting Guide for
Turning Operations
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Parts of a CNC Lathe Machine
Chuck
Tool Rest
Tail Stock
Aux. Operation Panel
Chip Pan
Foot Switch
Tool Eye
Lubrication Unit
Chuck Pressure Gauge
Spindle
Operation Panel
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Parts of a CNC Lathe Machine
Main power circuit breaker
Electric control cabinet
Hydraulic Unit
Coolant pump
Air unit
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Type of Programming
Mazatrol Programming
A type of program unique to Mazak machines that
uses conversational programming instead of G
codes.
Mazatrol programs can be written quickly and
easily.
Fundamentals of Programming
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Fundamentals of Programming
Control Axes
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Structure of a Program
Fundamentals of Programming
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a program code used to signal an action from a
miscellaneous group of commands. M codes
change cutting tools, turn on or turn off the coolant,spindle, or workpiece clamps.
M - Codes
Fundamentals of Programming
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M - Codes
Fundamentals of Programming
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Z-offset
is the difference between the referenceworkpiece zero point and the program zero
location on the face of the part.
Tool Compensation
Fundamentals of Programming
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Z-offset
1.Touch the tool tip into the face of the work piece
2.Press screen selector key
3.Press SET-UP INFO
4.Press Work No. then input Work No. to be run
Tool Compensation
Fundamentals of Programming
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5. Press TEACH
6. Key in the value of the WORKFACE thenpress INPUT (cursor-chuck_valid;jaw_1)
7. To check, return to POSITION. The value ofZ axis must be the same with theWORKFACE.
8. Check the maximum machining length bymoving Turret.(Z-130mm;X-100mm)
Tool Compensation
Fundamentals of Programming