HEIDENHAIN TNC 320 User Manual page 97

4.3 RIGID TAPPING without a
Floating Tap Holder NEW
(Cycle 207, DIN/ISO: G207)
Cycle run
The TNC cuts the thread without a floating tap holder in one or more
passes.
1 The TNC positions the tool in the tool axis at rapid traverse FMAX
to the programmed 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 The TNC brings spindle rotation to a stop at the set-up clearance.
HEIDENHAIN TNC 320 97