Siemens sinumerik 840D sl Operating Manual page 456

Programming technology functions (cycles)
8.7 Further cycles and functions ShopTurn
Parameters
Flush chuck
DIR
S
α1
Z1
ZR
FR
Fixed
stop
Function, complete
Withdraw blank
F
Cutting-off
cycle
Function, complete
Work offset
ZW
ZV
456
Description
Flush counterspindle chuck
Yes

No

Direction of rotation
Spindle rotates clockwise

Spindle rotates counterclockwise

Spindle does not rotate

Spindle speed – (only when the spindle rotates)
Angular offset
Transfer position (abs.)
Position, feedrate reduction (abs or inc)
Position from which a reduced feedrate is used.
Reduced feedrate
Travel to fixed stop
Yes

The counterspindle stops at a defined distance away from transfer position
Z1 and then traverses with a defined feedrate up to the fixed stop.
No

The counterspindle traverses to the transfer position Z1.
Withdrawing
Withdraw complete plank:
Yes

No

Feedrate
Cutting-off cycle in the following block
Yes

No

Rear face
Work offset in which the coordinate system, which was shifted according to ZW
and by ZV as well as mirrored in Z, must be saved:
Basic reference

G54

G55

G56

G57

...

Machining position for special axis (abs.); Machine
Offset Z = 0
Workpiece zero is offset in Z direction (inc, the sign is also evaluated)
Operating Manual, 07/2010, 6FC5398-8CP40-0BA0
Unit
rev/min
Degrees
mm/rev
mm/min
mm
mm
Turning