Heidenhain MANUALplus 4110 User Manual Page 379

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HEIDENHAIN MANUALplus 4110 379
6.21 Lateral Surface Machining
Helical-slot milling G798
G798 mills a helical slot from the current tool position to end point X,
Z. The slot width equals the diameter of the milling cutter.
For the first infeed, "I" is effective—MANUALplus then calculates all
further infeed movements as follows:
The infeed movement is reduced down to >= 0.5 mm. Following that,
each infeed movement will amount to 0.5 mm.
Parameters
X end point (diameter value)—(default: Current X position)
Z end point of slot
C starting angle: Starting position of the slot (default: 0)
F pitch
F positive: Right-hand thread
F negative: Left-hand thread
F pitch
P run-in length: Ramp at the beginning of the slot (default: 0)
K run-out length: Ramp at the end of the slot (default: 0)
U thread depth
I maximum infeed (default: Total depth in one infeed)
E reduction value for infeed reduction (default: 1)
Example: G798
%798.nc
[G798]
N1 T71 G197 S800 G195 F0.2 M104
N2 M14
N3 G110 C0
N4 G0 X80 Z15
N5 G798 X80 Z-120 C0 F20 K20 U5 I1
N6 M15
END
Current infeed = I * (1 – (n–1) * E)
n: nth infeed
You can mill a helical slot only on the outside.
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