Bore Milling (Cycle 208); Cycle Run - HEIDENHAIN TNC 640 User Manual

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3.9

BORE MILLING (Cycle 208)

Cycle run

1 The TNC positions the tool in the tool axis at rapid traverse
FMAX to the programmed set-up clearance above the workpiece
surface and then moves the tool to the bore hole circumference
on a rounded arc (if enough space is available).
2 The tool mills in a helix from the current position to the first
plunging depth at the programmed feed rate F.
3 When the drilling depth is reached, the TNC once again
traverses a full circle to remove the material remaining after the
initial plunge.
4 The TNC then positions the tool at the center of the hole again.
5 Finally the TNC returns to the setup clearance at FMAX. If
programmed, the tool moves to the 2nd set-up clearance at
FMAX.
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Fixed Cycles: Drilling | BORE MILLING (Cycle 208)
HEIDENHAIN | User's manual for cycle programming | 10/2017