HEIDENHAIN PT 855 for Milling - Manual (Page 62)

I - 4 Programming POSITIP
60 Operating Instructions POSITIP 855
Rectangular pocket milling in programs
The POSITIP makes the roughing out of rectangular pockets sim-
ple: You just enter the dimensions for the pocket, and POSITIP
calculates the rough-out paths.
Execution of cycle
The execution of the cycle is represented in Figs 7.6, 7.7 and 7.8.
I
:
The POSITIP gives the distances-to-go for positioning the tool at
the starting position A : first in the tool axis, and then in the
machining plane to the center of the pocket.
II
:
Roughing out the pocket in accordance with the path indicated in
the diagram (Fig. 7.8 shows climb milling). In the working plane
the stepover distance is equal to the tool radius R . The pecking
depth in the tool axis is random.
III
:
This procedure repeats itself until the entered depth B is reached.
Input into cycle
5.0 RECTANGULAR POCKET
• Starting position -
STARTPOS.
A
(enter absolute value, referenced to datum)
• Milling depth -
DEPTH B
(enter absolute value, referenced to datum)
• Pocket center in X -
POSX
MX
Center of the pocket in the main axis of the working plane.
• Pocket center in Y -
POSY
MY
Center of the pocket in the secondary axis of the working
plane.
• Side length in X -
LENGTH X
X
Length of the pocket in the direction of the main axis.
• Side length in Y -
LENGTH Y
Y
Length of the pocket in the direction of the secondary axis.
• Direction
DIR.
Input value 0: Climb milling (Fig. 7.8: anticlockwise)
Input value 1: Up-cut milling (clockwise)
• Finishing allowance -
FIN.AL
Finishing allowance in the working plane.
Fig. 7.6: Step
I
in cycle
5.0 RECTANGULAR POCKET
I
Z
A
X
II
Z
B
X
Fig. 7.8: Step
III
in cycle
5.0 RECTANGULAR POCKET
III
MY
R
Y
X
MX
Y
X
Fig. 7.7: Step
II
in cycle
5.0 RECTANGULAR POCKET