HEIDENHAIN SW 548328-05 - Manual (Page 261)

HEIDENHAIN MANUALplus 620 261
4.6 Thr
ead and under
c
ut cy
cles
Type of machining for technology database access: thread cutting
Cycle run
1 Calculate the proportioning of cuts
2 Start the first thread groove 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 thread groove
5 Repeat 3 and 4 for all thread grooves
6 Approach for next pass, taking the reduced cutting depth and the
feed angle A
into account
7 Repeat 3 to 6 until no. threads D and depth U are reached
8 Move to the tool change point according to the G14 setting
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