HEIDENHAIN SW 68894x-02 - Manual (Page 262)

262 Teach-in mode
4.6
Thr
ead
and
under
cut
cy
cles
Type of machining for technology database access: thread cutting
Cycle run
1 Calculate the proportioning of cuts
2 Start first pass at starting point Z
3 Move at the programmed feed rate to the contour end point Z2
4 Return on paraxial path and approach for next pass
5 Repeat 3 to 4 until the thread depth U is reached
6 Move to the tool change point according to the G14 setting
GH Type of offset
 0: Without offset
 1: From left
 2: From right
 3: Alternately left/right
A Approach (infeed) angle (range: –60° < A < 60°; default
30°)
 A<0: Infeed on left thread flank
 A>0: Infeed on right thread flank
R Remaining cutting depth only with GV=4 (default 1/100
mm)
IC Number of cuts—the infeed is calculated from IC and U.
Usable with:
 GV=0: Constant chip cross section
 GV=1: Constant infeed
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