HEIDENHAIN TNC 640 User Manual page 681

Manual Operation and Setup | Moving the machine axes
Features in the program run modes of operation
You can use the following functions in the Program Run modes of
operation:
The NC Start key (NC Start handwheel key)
The NC Stop key (NC Stop handwheel key)
After the NC Stop key has been pressed: Internal stop
(handwheel soft keys MOP and then Stop)
After the NC STOP key has been pressed: Traverse manual axes
(handwheel soft keys MOP and then MAN)
Returning to the contour after the axes were moved manually
during a program interruption (MOP and then REPO handwheel
soft keys). The handwheel soft keys, which function similarly to
the screen soft keys, are used for operating.
Further information:
On/off switch for the Tilt working plane function (handwheel soft
keys MOP and then 3D)
HEIDENHAIN | TNC 640 | ISO Programming User's Manual | 10/2017
"Returning to the contour", page 787
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