181
7.
4 Miscellaneous F
unctions f
o
r Cont
our
ing Beha
vior
7.4 Miscellaneous Functions for
Contouring Behavior
Smoothing corners: M90
Standard behavior
The TNC stops the tool briefly in positioning blocks without tool radius
compensation. This is called an accurate stop.
In program blocks with radius compensation (RR/RL), the TNC
automatically inserts a transition arc at outside corners.
Behavior with M90
The tool moves at corners with constant speed: This provides a
smoother, more continuous surface. Machining time is also reduced.
See figure at center right.
Example application: Surface consisting of a series of straight line
segments.
Effect
M90 is effective only in the blocks in which it is programmed with
M90.
M90 becomes effective at the start of block. Operation with servo lag
must be active.
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Y
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Summary of Contents for TNC 426
Page 3: ......
Page 4: ......
Page 8: ...IV...
Page 10: ...VI...
Page 26: ......
Page 27: ...1 Introduction...
Page 41: ...2 Manual Operation and Setup...
Page 54: ......
Page 55: ...3 Positioning with Manual Data Input MDI...
Page 59: ...4 Programming Fundamentals of NC File Management Programming Aids Pallet Management...
Page 122: ......
Page 123: ...5 Programming Tools...
Page 153: ...6 Programming Programming Contours...
Page 201: ...7 Programming Miscellaneous functions...
Page 226: ......
Page 227: ...8 Programming Cycles...
Page 366: ......
Page 367: ...9 Programming Subprograms and Program Section Repeats...
Page 381: ...10 Programming Q Parameters...
Page 424: ......
Page 425: ...11 Test run and Program Run...
Page 443: ...12 MOD Functions...
Page 472: ......
Page 473: ...13 Tables and Overviews...
Page 496: ......