HEIDENHAIN TNC 426 B User Manual page 308

Moving the machine axes during an interruption
You can move the machine axes during an interruption in the same
way as in the Manual Operation mode.
Danger of collision!
If you interrupt program run while the working plane is
tilted, you can change from a tilted to a non-tilted
coordinate system, and vice versa, by pressing the 3-D
ON/OFF soft key.
The functions of the axis direction buttons, the electronic
handwheel and the positioning logic for return to
contour are then evaluated by the TNC. When retracting
the tool make sure the correct coordinate system is
active and the angular values of the tilt axes are entered
in the 3-D ROT menu.
Example:
Retracting the spindle after tool breakage
Interrupting machining
Enable the external direction keys: Press the MANUAL OPERATI-
ON soft key.
Move the axes with the machine axis direction buttons.
On some machines you may have to press the machine
START button after the MANUAL OPERATION soft key to
enable the axis direction buttons. Your machine manual
provides more detailed information.
Resuming program run after an interruption
If a program run is interrupted during a fixed cycle, the
program must be resumed from the beginning of the
cycle. This means that some machining operations will
be repeated.
If you interrupt a program run during execution of a subprogram or
program section repeat, use the RESTORE POS AT N function to
return to the position at which the program run was interrupted.
When a program run is interrupted, the TNC stores:
The data of the last defined tool
Active coordinate transformations
The coordinates of the circle center that was last defined
HEIDENHAIN TNC 426 B, TNC 430
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