Siemens SINUMERIK 840D Programming Manual page 150

3
Milling Cycles
3.7 Milling rectangular pockets – POCKET1
Function
The cycle is a combined roughing-finishing cycle.
With this cycle you can machine rectangular pockets
in any position in the machining plane.
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.
The cycle implements the following motion
sequence:
• 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.
Complete machining of the pocket is performed
in the following stages:
- Infeed to the next machining depth with G1 and
feedrate FFD.
- Pocket milling up to the final machining
allowance with feedrate FFP1 and the spindle
speed that was active before the cycle was
called.
• After roughing is completed:
- Infeed to the machining depth defined by MIDF
- Final machining allowance along the contour
at feedrate FFP2 and speed SSF.
- The machining direction is defined by CDIR.
3-150
Y
G2
SINUMERIK 840D/840Di/810D Programming Guide Cycles (PGZ) – 11.02 Edition
3
12.97
G3
X
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