HEIDENHAIN TNC 640 (34059x-05) Cycle programming - Manual (Page 105)

TAPPING with a floating tap holder (Cycle 206, DIN/ISO: G206) 4.2
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TNC 640 | User's Manual Cycle Programming | 1/2015
105
4.2 TAPPING with a floating tap holder
(Cycle 206, DIN/ISO: G206)
Cycle run
1 The TNC positions the tool in the tool axis at rapid traverse
FMAX to the entered set-up clearance above the workpiece
surface.
2 The tool drills to the total hole depth in one movement.
3 Once the tool has reached the total hole depth, the direction of
spindle rotation is reversed and the tool is retracted to the set-
up clearance at the end of the dwell time. If programmed, the
tool moves to the 2nd set-up clearance at
FMAX.
4 At the set-up clearance, the direction of spindle rotation
reverses once again.