HEIDENHAIN TNC 640 (34059x-02) Cycle programming - Manual (Page 77)

BORING (Cycle 202, DIN/ISO: G202) 3.5
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TNC 640 | User's Manual Cycle Programming | 5/2013
77
3.5 BORING (Cycle 202, DIN/ISO: G202)
Cycle run
1 The TNC positions the tool in the tool axis at rapid traverse
FMAX to set-up clearance above the workpiece surface.
2 The tool drills to the programmed depth at the feed rate for
plunging.
3 If programmed, the tool remains at the hole bottom for the
entered dwell time with active spindle rotation for cutting free.
4 The TNC then orients the spindle to the position that is defined
in parameter Q336.
5 If retraction is selected, the tool retracts in the programmed
direction by 0.2 mm (fixed value).
6 The tool then retracts to set-up clearance at the retraction rate,
and from there—if programmed—to the 2nd set-up clearance at
FMAX. If Q214=0 the tool point remains on the wall of the hole.