HEIDENHAIN TNC 640 (34059x-05) Cycle programming - Manual (Page 114)

Fixed Cycles: Tapping / Thread Milling
4.4 TAPPING WITH CHIP BREAKING (Cycle 209, DIN/ISO: G209)
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TNC 640 | User's Manual Cycle Programming | 1/2015
Retracting after a program interruption
Retracting in the Manual Operation mode
You can interrupt the thread cutting process by pressing the NC
Stop key. A soft key for retracting the tool from the thread is
displayed in the soft-key row below the screen. When you press
this soft key and the NC Start key, the tool retracts from the
hole and returns to the starting point of machining. The spindle
is stopped automatically and the TNC displays a message.
Retracting in the Program Run, Single Block or Full Sequence
mode
You can interrupt the thread cutting process by pressing the
NC Stop key and then INTERNAL STOP. The TNC displays
the
MANUAL OPERATION soft key. After pressing MANUAL
OPERATION, you can retract the tool in the active spindle axis.
To resume machining after the interruption, press the
RESTORE
POSITION soft key and NC Start. The TNC moves the tool back
to the starting position.
When retracting the tool you can move it in the
positive and negative tool axis directions. Please
keep this in mind during retraction—danger of
collision!