Siemens sinumerik 840D sl Operating Manual page 320

Programming technology functions (cycles)
8.3 Contour turning
Parameters Description
Always round on the contour.
Never round on the contour.
Only round to the previous intersection.
Uniform cut segmentation
Round cut segmentation at the edge
Constant cutting depth
Alternating cutting depth - (only with align cut segmentation to edge)
DZ Maximum depth infeed - (only for position parallel to the contour and UX)
UX or U Finishing allowance in X or finishing allowance in X and Z – (only for ∇)
UZ Finishing allowance in Z – (only for UX)
DI For zero: Continuous cut - (only for ∇)
BL Description of unmachined part
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XD - (only for unmachined part description, cylinder and allowance)
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ZD - (only for unmachined part description, cylinder and allowance)
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Allowance Allowance for pre-finishing - (only for ∇∇∇)
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U1 Compensation allowance in X and Z direction (inc) – (only for allowance)
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Cylinder
Allowance
Contour
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)
Yes
U1 contour allowance
No
Positive value: Compensation allowance is kept
Negative value: Compensation allowance is removed in addition to finishing
allowance
Operating Manual, 07/2010, 6FC5398-8CP40-0BA0
Unit
mm
mm
mm
mm
mm
mm
mm
Turning