Thread Milling Unit - HEIDENHAIN CNC PILOT 640 User Manual

smart.Turn units | Units – milling, face (C axis)

Thread milling unit

The unit mills a thread in existing holes.
Place the tool on the center of the hole before calling G799.
The cycle positions the tool to the End point thread within the
hole. Then the tool approaches at Apprch angle R and mills the
thread. With each rotation the tool moves by the Thread pitch F1.
Following that, the cycle retracts the tool and returns it to the Start
point. With parameter V, you can program whether the thread is
to be milled in one rotation or, with single-point tools, in several
rotations.
Unit name: G799_Gewindefr_C / cycle: G799
"Thread milling axial G799", Page 391
Further information:
Position form:
Z1: Start point drill
P2: Thread depth
I: Thread diameter
F1: Thread pitch
Cycle form:
J: Direction of thread:
0: Right-hand thread
1: Left-hand thread
H: Mill cutting direction
0: Up-cut
1: Climb
V: Milling method
0: One revolution – the thread is milled in a 360-degree
helix
1: Two or more revolutions – the thread is milled in several
helix paths (single-point tool)
R: Approach radius
Further forms:
Further information: "smart.Turn unit", Page 78
Access to the technology database:
Machining operation: Finish-milling
Affected parameters: F, S
HEIDENHAIN | User's Manual smart.Turn and DIN Programming | 12/2017
2
173