Siemens SINUMERIK 840D Operating Manual page 404

Programming technological functions (cycles)
8.5 Contour turning - only for G code programs
Parameters
Description
FX Feedrate in X direction
FZ Feedrate in Z direction
Machining 

Machining 
direction

Position 



D Maximum depth infeed - (only for ∇)
UX or U Finishing allowance in X or finishing allowance in X and Z – (only for ∇)
UZ Finishing allowance in Z – (only for UX)
XDA 1. Grooving limit tool ∅ (abs) – (end face or rear face only)
XDB 2. Grooving limit tool ∅ (abs) – (end face or rear face only)
Allowance Allowance for prefinishing


DI For zero: Continuous cut - (only for ∇)
XD - (only for unmachined part description, cylinder and allowance)


ZD - (only for unmachined part description, cylinder and allowance)


U1 Compensation allowance in X and Z direction (inc) – (only for allowance)


404
∇ (roughing)
∇∇∇ (finishing)
Face
Longitudinal
front
back
internal
external
Yes
U1 contour allowance
No
For unmachined part description, cylinder
– Allowance or cylinder dimension ∅ (abs)
– Allowance or cylinder dimension (inc)
For unmachined part description, allowance
– Allowance on the contour ∅ (abs)
– Allowance on the contour (inc)
For unmachined part description, cylinder
Allowance or cylinder dimension (abs or inc)
For unmachined part description, allowance
Allowance on the contour (abs or inc)
Positive value: Compensation allowance is kept
Negative value: Compensation allowance is removed in addition to finishing
allowance
Operating Manual, 03/2010, 6FC5398-7CP20-1BA0
Unit
mm/rev
mm/rev
mm
mm
mm
mm
mm
mm
mm
mm
mm
Milling