HEIDENHAIN iTNC 530 (340 422) ISO programming - Manual (Page 224)

224 8 Programming: Cycles
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Calling a cycle
The following cycles become effective automatically as soon as they
are defined in the part program. These cycles cannot and must not be
called:
n Cycle G220 for circular and Cycle G221 for linear hole patterns
n SL Cycle G14 CONTOUR GEOMETRY
n SL Cycle G20 CONTOUR DATA
n Cycle G62 TOLERANCE
n
Coordinate transformation cycles
n
Cycle G04 DWELL TIME
You can call all other cycles with the functions described as follows.
Calling a cycle with G79 (CYCL CALL)
The G79 function calls the last defined fixed cycle once. The starting
point of the cycle is the position that was programmed last before the
G79 block.
U U U U To program the cycle call, press the CYCL CALL key.
U U U U Press the CYCL CALL M soft key to enter a cycle call.
U U U U If necessary, enter the miscellaneous function M (for
example M3 to switch the spindle on), or end the
dialog by pressing the END key
Calling a cycle with G79 PAT (CYCL CALL PAT)
The G79 PAT function calls the most recently defined fixed cycle at all
positions defined in a point table (see “Point Tables” on page 226).
Prerequisites
The following data must always be programmed before a
cycle call:
n G30/G31 for graphic display (needed only for test
graphics)
n Tool call
n Direction of spindle rotation (M functions M3/M4)
n Define cycle
For some cycles, additional prerequisites must be
observed. They are detailed in the descriptions for each
cycle.