Machining Open Contour Corners: M98 - HEIDENHAIN TNC 620 User Manual

Miscellaneous Functions | Miscellaneous functions for path behavior

Machining open contour corners: M98

Standard behavior
The control calculates the intersections of the cutter paths at inside
corners and moves the tool in the new direction at those points.
If the contour is open at the corners, however, this will result in
incomplete machining.
Behavior with M98
With the M98 miscellaneous function, the control temporarily
suspends radius compensation to ensure that both corners are
completely machined:
Effect
M98 is effective only in the blocks where itis programmed.
M98 becomes effective at the end of the block.
Example: Move to the contour points 10, 11 and 12 in
succession
10 L X... Y... RL F
11 L X... IY... M98
12 L IX+ ...
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2017
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