Siemens SINUMERIK 840D Programming Manual page 155

03.96
08.97
3
Further notes
A tool offset must be activated before the cycle is
called. Otherwise the cycle is aborted and alarm 61000
"No tool offset active" is output.
A new workpiece coordinate system that influences
the actual value display is used in the cycle. The
zero point of this coordinate system lies on the
pocket center point.
The original coordinate system becomes active
again after the end of the cycle.
Programming example
Circular pocket
With this program you can machine a circular pocket
in the YZ plane. The center point is defined by Y50
Z50. The infeed axis for the depth infeed is the
X axis. Neither a final machining allowance nor a
safety clearance is defined. The pocket will be
machined using opposed milling. Infeed occurs
along an helical path.
N10 G19 G90 G0 S650 M3 T20 D20
N20 Y50 Z50
N30 POCKET4 (3, 0, 0, -20, 25, 50, 50, ->
-> 6, 0, 0, 200, 100, 1, 21, 0, 0, 0, ->
-> 2, 3)
N40 M30
-> Must be programmed in a single block
 Siemens AG 2000 All rights reserved.
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide, Cycles (PGZ) - 04.00 Edition
3.10 Milling circular pockets - POCKET4
Z
Specification of technology values
Approach starting position
Cycle call
Parameters FAL and VARI are omitted
End of program
Milling Cycles
A
B
Y
50
3
Z
A - B
X
20
3-155