Owner's manual

Using Pocket Milling Cycles
Chapter 22
22-5
If ,R or ,C is not programmed in the G88.1 block, each corner of the
rectangular pocket is squared off as much as the tool radius will allow. If
,R or ,C is programmed in the G88.1 block, the corners of the rectangular
pocket will either be rounded or chamfered. Refer to chapter 16, Using
Chamfers and Corner Radius, for additional information on chamfers and
corner rounding.
Use the G88.1 pocket milling roughing cycle to enlarge an existing
rectangular pocket in a workpiece. This cycle makes multiple rectangular
cuts at a programmed width and depth.
The G88.1 block used to enlarge an existing rectangular pocket has this
format:
G88.1 X__Y__Z__I__J__Q__(,R or,C)__P__H__D__L__E__F__;
Where : Is :
XY
The coordinates thatspecify the centeroftheoriginal rectangularpocket.
Z
The coordinate (along the plungingaxis)thatspecifies the bottomofthe
rectangularpocket.
IJ
Length ofthe original rectangular pocket’ssides. I specifies the length ofthe side
parallel to the Xaxis. Jspecifies the length ofthe side parallel to the Yaxis.
These are unsigned incremental values.
Important: Itisassumedthat Iand Jareassigned in AMP as the integrand
axisnamesthatcorrespond tothe Xand Yaxesrespectively.
Q
Unsignedincremental valuethatspecifies howmuchtheoriginal rectangular
pocketshould be enlarged. Iand Jarebothenlargedby thisamount.
,R
Corner radius.
,C
Corner chamfer.
P
Directionofroughing cut.
H
Finishallowance.
D
Roughingcutthickness.
L
Incrementalplunge depth.
E
Plungefeedrate.
F
Roughingfeedrate.
Important: The rectangular pocket does not have to be parallel to the axes
of the selected plane. It may be rotated by rotating the work coordinate
system (G68). Refer to chapter 13 for additional information on rotating
the work c oordinate system.
22.1.2
Rectangular Pocket
Enlarging Using G88.1