HEIDENHAIN TNC 370 - Page 193

8 Cycles
8.1 General Overview of Cycles
Cycle call
The following data must be programmed before a cycle calt:
* BLK FQRM for graphic disptay
* Tooi calf
l Direction of rota&n of the spindffl (misceilansous functions M3/M4f
* Cycta definltkm K?KL DEF).
The following cycles become effective immediately upon being defined in
the part program. These cycles must not (and cannot) be called:
l The cycles for circular and linear hole patterns
l The SL cycle CONTOUR GEOMETRY
l Coordinate transformation cycles
l The DWELL TIME cycle.
All other cycles must be called separately.
If the cycle is to be executed once after the last programmed block,
program the cycle call
l with CYCL CALL
Cycle call with miscellaneous function M3
l or with the miscellaneous function M99.
If the cycle is to be run automatically after every positioning block, pro-
gram the cycle call with M89 (depending on machine parameter 7440).
M89 is cancelled by programming
l M99, or
l CYCL CALL, or
l CYCL DEF.
8-4 TNC 370