Siemens sinumerik 840D sl Operating Manual page 277

Parameters Description
Face C:
center/ Position circle center on the face surface
off-center Position circle off-center on the face surface
Z0 Z coordinate of the reference point (abs)
X0 X coordinate of the reference point (abs) – (only for off-center)
Y0 Y coordinate of the reference point (abs) – (only for off-center)
α0 Starting angle for first position referred to the X axis.
Positive angle: Circle is rotated counterclockwise.
Negative angle: Circle is rotated clockwise.
α1 Advance angle - (for pitch circle only)
R Radius
N Number of positions
Straight line: Next position is approached linearly at rapid traverse.
Positioning 
(only for
Circle: Next position is approached along a circular path at the feedrate defined in a

ShopTurn)
machine data code.
Face Y:
center/ Position circle center on the face surface
Position circle off-center on the face surface
off-center
Z0 Z coordinate of the reference point (abs)
CP Positioning angle for machining area
X0 or L0 X coordinate of the reference point (abs) or reference point length, polar
– (only for off-center)
Y0 or C0 Y coordinate of the reference point (abs) or
reference point angle, polar – (only for off-center)
α0
Starting angle for first position referred to the X axis.
Positive angle: Circle is rotated counterclockwise.
Negative angle: Circle is rotated clockwise.
α1
Advance angle - (for pitch circle only)
R
Radius
N
Number of positions
Positioning
Straight line: Next position is approached linearly in rapid traverse.

(only for
Circle: Next position is approached along a circular path at the feedrate defined in

ShopTurn)
the machine data.
Turning
Operating Manual, 07/2010, 6FC5398-8CP40-0BA0
Programming technology functions (cycles)
8.1 Drilling
Unit
mm
mm
mm
Degrees
Degrees
mm
mm
Degrees
mm
mm
Degrees
Degrees
Degrees
mm
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