Siemens SINUMERIK 840D Programming Manual page 168

3
Milling Cycles
3.10 Milling circular pockets – POCKET4
The other parameters can be selected as options. They define the insertion strategy and
overlapping for solid machining: (enter without sign)
real
_MIDA
real
_AP1
real
_AD
real
_RAD1
real
_DP1
Function
With this cycle you can machine circular pockets in
the machining plane.
For finishing, a face cutter is needed.
The depth infeed will always start at the pocket
center point and be performed vertically from there;
thus predrill can be suitably performed in this
position.
New functions compared to POCKET2:
• The milling direction can be defined with a
G instruction (G2/G3) or up-cut milling or down-
cut from the spindle direction
• For solid machining, the maximum infeed width in
the plane is programmable
• Final machining allowance for the pocket base
• Two different insertion strategies:
- Vertically from the pocket center point
- Along a helical path around the pocket center
• Shorter approach paths in the plane for finishing
• Consideration of a blank contour in the plane and
a basic size at the base (optimum processing of
pre-formed pockets possible)
• _MIDA is recalculated when machining the edge.
3-168
Maximum infeed width during solid machining in the plane
Basic size pocket radius
Basic pocket depth from reference plane
Radius of the helical path during insertion related to the tool center point
path)
Insertion depth per 360° revolution on insertion along helical path
SINUMERIK 840D/840Di/810D Programming Guide Cycles (PGZ) – 11.02 Edition
3
12.97
© Siemens AG, 2002. All rights reserved