HEIDENHAIN TNC 640 (34059x-01) Cycle programming - Manual (Page 42)

42 Using Fixed Cycles
2.1 W
o
rk
ing with Fix
e
d Cy
cles
2.1 Working with Fixed Cycles
Machine-specific cycles
In addition to the HEIDENHAIN cycles, many machine tool builders
offer their own cycles in the TNC. These cycles are available in a
separate cycle-number range:
„ Cycles 300 to 399
Machine-specific cycles that are to be defined through the
CYCLE DEF key
„ Cycles 500 to 599
Machine-specific touch probe cycles that are to be defined through
the TOUCH PROBE key
Sometimes machine-specific cycles use transfer parameters that
HEIDENHAIN already uses in standard cycles. The TNC executes DEF-
active cycles as soon as they are defined (see also "Calling cycles" on
page 44). It executes CALL-active cycles only after they have been
called (see also "Calling cycles" on page 44). When DEF-active cycles
and CALL-active cycles are used simultaneously, it is important to
prevent overwriting of transfer parameters already in use. Use the
following procedure:
U As a rule, always program DEF-active cycles before CALL-active
cycles
U If you do want to program a DEF-active cycle between the definition
and call of a CALL-active cycle, do it only if there is no common use
of specific transfer parameters
Refer to your machine manual for a description of the
specific function.