HEIDENHAIN SW 688945-03 - Manual (Page 267)

HEIDENHAIN CNC PILOT 620/640 267
4.6 Thr
ead and under
c
ut cy
cles
Cycle run
1 Pre-position threading tool to center of thread groove
2 Use the Take over position soft key to transfer the tool position
and spindle angle to the parameters measured positions ZC and
measured angle C
3 Move the tool manually out of the thread groove
4 Position the tool to the starting point
5 Start cycle with the Input finished soft key, then press Cycle
START
MT M after T: M function that is executed after the tool call T
MFS M at beginning: M function that is executed at the
beginning of the machining step
MFE M at end: M function that is executed at the end of the
machining step
WP Displays which workpiece spindle is used to process the
cycle (machine-dependent)
 Main drive
 Opposing spindle for rear-face machining