Siemens SINUMERIK 840D sl Operating Manual page 428

Programming technological functions (cycles)
8.4 Turning - only for G code programs
Parameters, G code program (undercut, thread)
PL Machining plane
SC Safety clearance
F Feedrate
Parameter
Machining
Machining
direction
Position
X0
Z0
X1
Z1
R1
R2
α
VX
D
U or UX
UZ
* Unit of feedrate as programmed before the cycle call
428
mm
*
Description
∇ (roughing)
•
∇∇∇ (finishing)
•
∇ + ∇∇∇ (roughing and finishing)
•
Longitudinal
•
Parallel to the contour
•
Machining position:
Reference point X ∅
Reference point Z
Undercut depth referred to X ∅ (abs) or undercut depth referred to X (inc)
Allowance Z (abs or inc)
Rounding radius 1
Rounding radius 2
Insertion angle
Cross feed ∅ (abs) or cross feed (inc) - (only for ∇∇∇ and ∇ + ∇∇∇)
Maximum depth infeed – (only for ∇ and ∇ + ∇∇∇)
Finishing allowance in X or finishing allowance in X and Z – (only for ∇ and ∇ +
∇∇∇)
Finishing allowance in Z – (only for UZ, ∇ and ∇ + ∇∇∇)
Operating Manual, 03/2013, 6FC5398-7CP40-3BA1
Unit
mm
mm
mm
mm
Degrees
mm
mm
mm
Milling