Siemens SINUMERIK 840D Programming Manual page 169

3
12.97
Sequence of operations
Position reached prior to cycle start:
This can be any position from which the starting
position on the center point of the pocket at the
retraction plane level can be approached without
collision.
Motion sequence when roughing (VARI=X1):
With G0, the pocket center point is approached at the
retraction plane level and then, from this position, with
G0 the reference plane brought forward by the safety
distance is approached. Pocket machining is then
performed according to the selected insertion strategy
and considering the programmed base size.
Insertion strategies:
see Section 3.9 (POCKET3)
Accounting for blank dimensions
During solid machining, it is possible to take blank
dimensions (for example, in the machining of
precast workpieces) into account.
For circular pockets, the basic size _AP1 at the edge
is also circular (with a smaller radius than the pocket
radius).
For additional explanations see Section 3.9
(POCKET3)
© Siemens AG, 2002. All rights reserved
SINUMERIK 840D/840Di/810D Programming Guide Cycles (PGZ) – 11.02 Edition
3.10 Milling circular pockets – POCKET4
Y
Milling Cycles
_PA
G2
G3
3
X
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