HEIDENHAIN TNC 640 (34059x-01) Cycle programming - Manual (Page 44)

44 Using Fixed Cycles
2.1 W
o
rk
ing with Fix
e
d Cy
cles
Calling cycles
The following cycles become effective automatically as soon as they
are defined in the part program. These cycles cannot and must not be
called:
„ Cycle 220 for point patterns on circles and Cycle 221 for point
patterns on lines
„ SL Cycle 14 CONTOUR GEOMETRY
„ SL Cycle 20 CONTOUR DATA
„ Cycle 32 TOLERANCE
„ Coordinate transformation cycles
„ Cycle 9 DWELL TIME
„ All touch probe cycles
You can call all other cycles with the functions described as follows.
Calling a cycle with CYCL CALL
The CYCL CALL function calls the most recently defined fixed cycle
once. The starting point of the cycle is the position that was
programmed last before the CYCL CALL block.
U To program the cycle call, press the CYCL CALL key
U Press the CYCL CALL M soft key to enter a cycle call
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 CYCL CALL PAT
The CYCL CALL PAT function calls the most recently defined fixed cycle
at all positions that you defined in a PATTERN DEF pattern definition
(see "Pattern Definition PATTERN DEF" on page 46) or in a point table
(see "Point Tables" on page 54).
Prerequisites
The following data must always be programmed before a
cycle call:
„ BLK FORM for graphic display (needed only for test
graphics)
„ Tool call
„ Direction of spindle rotation (M functions M3/M4)
„ Cycle definition (CYCL DEF)
For some cycles, additional prerequisites must be
observed. They are detailed in the descriptions for each
cycle.