Owner's manual

Using Pocket Milling Cycles
Chapter 22
22-3
Where : Is :
E
Plungefeedrate. ThisparameterdeterminesthefeedrateofanyZ axismoves. If
notprogrammed,theroughingfeedrate(F)willbeused.
F
Roughingfeedrate. This parameterdeterminesthefeedrateofany XYaxis
moves. Ifnotprogrammed,the existing(modal)feedratewillbe used.
Important: T he rectangularpocketdoesnothavetobe parallel totheaxes
ofthe selected plane. Itmay berotatedby rotating the workcoordinate system
(G68). Refertochapter 13foradditionalinformation on rotating the work
coordinatesystem.
Figure 22.1
Rectangular Pocket Roughing Using G88.1
J
I
R
45•
Plunge Position
D/2
D
D
H+TR
(X, Y)
Y
X
Important: The t ool should be positioned near the center of the pocket
prior to the G88.1 block. The Z c oordinate of this position determines the
initial Z level or top of the pocket. This is the pre-cycle position of the
tool. The pre-cycle position must be at some depth other than t he cycles
programmed final depth or an error is generated.
From the pre-cycle position, the control simultaneously raises the tool by
the clearance amount (AMP selectable, refer to the literature provided by
your system installer) while moving it to the center of the rectangular
pocket specified by the X and Y parameters. T his simultaneous move
takes place at the rapid feedrate. The center of the rectangular pocket is
the plunge position, the position where the plunge to the programmed
depth takes place.