Siemens SINUMERIK 840D, Operating Manual

Page: 346 / 610

Programming technological functions (cycles)
8.3 Contour milling
Milling
346
Operating Manual, 03/2010, 6FC5398-7CP20-1BA0
Predrilling procedure
1. The part program or ShopMill program to be processed has been
created and you are in the editor.
2. Press the "Cont. mill.", "Predrilling", and "Predrilling" softkeys.
The "Predrilling" input window opens.
Parameters, G code program Parameters, ShopMill program
PRG Name of the program to be generated T Tool name
PL Machining plane D Cutting edge number
Milling direction  Climbing

Conventional
F Feedrate mm/min
mm/rev
RP Retraction plane mm S / V Spindle speed or constant
cutting rate
rpm
m/min
SC Safety clearance mm
F Feedrate mm/min
Parameter Description Unit
TR Reference tool Tool, which is used in the "solid machining" machining step. This is
used to determine the plunge position.
Z0 Reference point Z mm
Z1 Pocket depth (abs) or depth referred to Z0 (inc) mm
DXY
 Maximum plane infeed
 Maximum plane infeed as a percentage of the milling cutter diameter
in
%
UXY Finishing allowance, plane mm
UZ Finishing allowance, depth mm
Lift mode Lift mode before new infeed
If the machining operation requires several points of insertion, the retraction height can
be programmed:

To retraction plane

Z0 + safety clearance
When making the transition to the next insertion point, the tool returns to this height. If
there are no elements larger than Z0 in the pocket area, "Z0 + safety clearance" can be
selected as the lift mode.
mm
mm