HEIDENHAIN TNC 128 (77184x-01) - Manual (Page 364)

364 Fundamentals of cycles
15.3 W
o
rk
ing with fix
e
d cy
cles
15.3 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 366). It executes CALL-active cycles only after they have been
called (see also "Calling cycles" on page 366). 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:
 As a rule, always program DEF-active cycles before CALL-active
cycles
 Only program a DEF-active cycle between the definition and call of
a CALL-active cycle if there is no common use of specific transfer
parameters
Refer to your machine manual for a description of the
specific function.