Siemens SINUMERIK 840D Programming Manual page 138

Milling Cycles 03.96
08.97
3 3
3.8 Milling circular pockets - POCKET2
Description of parameters
Y
See Section 2.1.2. (Drilling, Centering – CYCLE81)
CPA
for a description of parameters RTP, RFP, SDIS.
See Section 3.7 for a description of parameters DP,
DPR.
G2
G3
See Section 3.5 (SLOT1) for a description of
parameters FFD, FFP1, MID, CDIR, FAL, VARI,
MIDF, FFP2, SSF.
See Section 3.2 for cycle setting data _ZSD[1].
X
PRAD (pocket radius)
The shape of the circular pocket is determined by
the radius only.
If the radius is less than the tool radius of the active
tool, the cycle is aborted after alarm
61105 "Milling cutter radius too large" is output.
CPA, CPO (pocket center point)
With parameters CPA and CPO you define the
center point of the circular pocket in the abscissa
and ordinate.
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.
The depth infeed is always made in the pocket center
point. It can be useful to drill there beforehand.
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.
 Siemens AG 2000 All rights reserved.
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SINUMERIK 840D/840Di/810D/FM-NC Programming Guide, Cycles (PGZ) - 04.00 Edition