Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 622)

Irregular Pocket Milling Cycles
Chapter 25
25-4
Figure 25.1
Irregular Pocket Roughing Cycle Entry Moves
TOP
VIEW
End wall (defined
in block called out
by Q parameter)
Start wall (defined in block
called out by P parameter)
Start-point
Start/end corner
X
Y
Initial Z level (top of pocket)
SIDE
VIEW
c d b
A
C B D
Z
(incremental)
Z
(absolute)
H
X
Z
L
D
A/B
C
H
From the final cutter position of Figure 25.1, the control moves the cutter
twice around the programmed contour of the pocket as shown in
Figure 25.2. The first pass around the pocket removes material twice the
cutter radius (cutter diameter) in width (D through I in Figure 25.2). The
second pass removes material that is one cutter radius in width (I through
N in Figure 25.2).