HEIDENHAIN TNC 128 (77184x-02) - Manual (Page 377)

Working with fixed cycles 15.3
15
TNC 128 | User's Manual HEIDENHAIN Conversational Programming | 5/2014
377
Cycle call with M99/M89
The M99 function, which is active only in the block in which it
is programmed, calls the last defined fixed cycle once. You can
program
M99 at the end of a positioning block. The TNC moves to
this position and then calls the last defined fixed cycle.
If the TNC is to run the cycle automatically after every positioning
block, program the first cycle call with
M89.
To cancel the effect of
M89, program:
M99 in the positioning block in which you move to the last
starting point, or
Use
CYCL DEF to define a new fixed cycle