HEIDENHAIN MANUALplus 620 425
5.7 Milling Cycles for the Y Axis
Thread milling in XY plane G800
G800 mills a thread in existing holes.
Place the tool on the center of the hole before calling G800. The cycle
positions the tool on the end point of the thread within the hole. The
tool then approaches on the approach radius R, mills the thread in a
rotation of 360°, while advancing by the thread pitch F. Following that,
the cycle retracts the tool and returns it to the starting point.
Parameters
I Thread diameter
Z Starting point Z
K Thread depth
R Approach radius
F Thread pitch
J Direction of thread—(default: 0)
0: Right-hand thread
1: Left-hand thread
H Cutting direction (default: 0)
0: Up-cut milling
1: Climb milling
Use thread-milling tools for cycle G800.
Danger of collision!
Be sure to consider the hole diameter and the diameter
of the milling cutter when programming “approach
radius R.”
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