Siemens SINUMERIK 840D, Operating Manual, Page: 395 / 610

Programming technological functions (cycles)
8.5 Contour turning - only for G code programs
Milling
Operating Manual, 03/2010, 6FC5398-7CP20-1BA0
395
Parameters Description Unit
The machining direction depends on the stock removal direction and choice of tool.
Position 
front
 back
 internal

external
D Maximum depth infeed - (only for ∇) mm
XDA 1. Grooving limit tool (abs) – (only for face machining direction) mm
XDB 2. Grooving limit tool (abs) – (only for face machining direction) mm
DX Maximum depth infeed - (only for parallel to the contour, as an alternative to D) mm
Do not round contour at end of cut.
Always round contour at end of cut.
Uniform cut segmentation
Round cut segmentation at the edge
Constant cutting depth
Alternating cutting depth - (only with align cut segmentation to edge)
Allowance Allowance for pre-finishing - (only for ∇∇∇)

Yes
U1 contour allowance

No
s
U1 Compensation allowance in X and Z direction (inc) – (only for allowance)

Positive value: Compensation allowance is kept

Negative value: Compensation allowance is removed in addition to finishing
allowance
mm
Set machining area
limits
Set machining area limits

Yes
–
XA: 1. Limit XA ∅
– XB: 2nd limit XB ∅ (abs) or 2nd limit referred to XA (inc)
– ZA: 1. Limit ZA
– ZB: 2nd limit ZB (abs) or 2nd limit referred to ZA

No
Relief cuts Machine relief cuts

Yes

No
FR Insertion feedrate, relief cuts