Multiple axismachining
12.6 Running CAM programs
12
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HEIDENHAIN | TNC 620 | ISO Programming User's Manual | 9/2016
Please note the following for CAM programming
Adapting chord errors
When defining finishing operations, make sure
that the chord error defined in the CAM system is
not set to greater than 5 µm. In Cycle 32, use the
appropriate tolerance factor
T
of 1.3 to 5.
When defining roughing operations, make sure that
the sum of the chord error and the tolerance from
Cycle 32 is less than the defined machining oversize.
This ensures that no contour gouging will occur.
Adapt the chord error in the CAM program, depending on the
machining:
Roughing with preference for speed:
Use higher values for the chord error and the appropriate
tolerance in Cycle 32. Both values depend on the oversize
required on the contour. If a special cycle is available on
your machine, use the roughing mode. In roughing mode
the machine generally moves with high jerk values and high
accelerations
Normal tolerance in Cycle 32: Between 0.05 mm and
0.3 mm
Normal chord error in the CAM system: Between
0.004 mm and 0.030 mm
Finishing with preference for high accuracy:
Use smaller values for the chord error and an appropriately low
tolerance in Cycle 32 The data density must be high enough for
the TNC to detect transitions and corners exactly. If a special
cycle is available on your machine, use the finishing mode.
In finishing mode the machine generally moves with low jerk
values and low accelerations
Normal tolerance in Cycle 32: Between 0.002 mm and
0.006 mm
Normal chord error in the CAM system: Between
0.001 mm and 0.004 mm
Finishing with preference for high surface quality:
Use small values for the chord error and an appropriately larger
tolerance in Cycle 32 The TNC then smooths the contour more
exactly. If a special cycle is available on your machine, use the
finishing mode. In finishing mode the machine generally moves
with low jerk values and low accelerations
Normal tolerance in Cycle 32: Between 0.010 mm and
0.020 mm
Normal chord error in the CAM system: Smaller than
0.005 mm
Summary of Contents for TNC 620 Programming Station
Page 4: ......
Page 5: ...Fundamentals ...
Page 28: ...Contents 28 HEIDENHAIN TNC 620 ISO Programming User s Manual 9 2016 ...
Page 57: ...1 First Steps with the TNC 620 ...
Page 77: ...2 Introduction ...
Page 110: ......
Page 111: ...3 Fundamentals file management ...
Page 166: ......
Page 167: ...4 Programming aids ...
Page 194: ......
Page 195: ...5 Tools ...
Page 234: ......
Page 235: ...6 Programming contours ...
Page 284: ......
Page 285: ...7 Data transfer from CAD files ...
Page 304: ......
Page 305: ...8 Subprograms and program section repeats ...
Page 323: ...9 Programming Q parameters ...
Page 384: ......
Page 385: ...10 Miscellaneous functions ...
Page 407: ...11 Special functions ...
Page 433: ...12 Multiple axis machining ...
Page 475: ...13 Pallet management ...
Page 480: ......
Page 481: ...14 Manual Operation and Setup ...
Page 549: ...15 Positioning with Manual Data Input ...
Page 554: ......
Page 555: ...16 Test Run and Program Run ...
Page 590: ......
Page 591: ...17 MOD Functions ...
Page 622: ......
Page 623: ...18 Tables and Overviews ...