Siemens sinumerik 840D sl Operating Manual page 400

Programming technology functions (cycles)
8.5 Contour milling
Parameters Description
TR Reference tool Tool, which is used in the "solid machining" machining step. This is
used to determine the plunge position.
Face C
Machining 
surface
Face Y

(only for
Face B

ShopTurn)
Peripheral surface C

Peripheral surface Y

Reference point Z or X
Z0 or - (only for G code and ShopTurn, machining surface, face C/Y/B)
X0 - (only for ShopTurn, machining surface, peripheral surface C/Y)
Pocket depth (abs) or depth referred to Z0 or X0 (inc)
Z1 or - (only for G code and ShopTurn, machining surface, face C/Y/B)
X1 - (only for ShopTurn, machining surface, peripheral surface C/Y)
CP Positioning angle for machining area
- (only for ShopTurn, machining surface, face Y)
C0 Positioning angle for machining surface
- (only for ShopTurn, machining surface, peripheral surface Y)
Maximum plane infeed

Maximum plane infeed as a percentage of the milling cutter diameter

DXY or
- (only for G code and ShopTurn, machining surface, face C/Y/B)
DYZ
- (only for ShopTurn, machining surface, peripheral surface C/Y)
Finishing allowance plane
UXY or - (only for G code and ShopTurn, machining surface, face C/Y/B)
UYZ - (only for ShopTurn, machining surface, peripheral surface C/Y)
Finishing allowance depth
UZ or - (only for G code and ShopTurn, machining surface, face C/Y/B)
UX - (only for ShopTurn, machining surface, peripheral surface C/Y)
Lift mode Lift mode before new infeed
If the machining operation requires several points of insertion, the retraction height can
be programmed:
to RP

Z0 + safety clearance - (only for G code and ShopTurn, machining surface, face

C/Y/B) or
X0 + safety clearance - (only for ShopTurn, machining surface, peripheral surface

C/Y)
On making the transition to the next insertion point, the tool returns to this height. If
there are no elements larger than Z0 (X0) in the pocket area, then Z0 (X0) + safety
clearance can be programmed as the lift mode.
400
Operating Manual, 07/2010, 6FC5398-8CP40-0BA0
Unit
mm
mm
Degrees
Degrees
in
%
mm
mm
mm
mm
mm
Turning