HEIDENHAIN TNC 620 User Manual page 110

4
Fixed Cycles: Tapping / Thread Milling
4.4 TAPPING WITH CHIP BREAKING (Cycle 209, DIN/ISO: G209)
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. The TNC displays the MANUAL TRAVERSE soft
key. After you pressed the MANUAL TRAVERSE soft key, you
can retract the tool from 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
position it had assumed before the NC Stop key was pressed.
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!
110
HEIDENHAIN | TNC 620 | User's manual for cycle programming | 9/2015