HEIDENHAIN TNC 620 User Manual page 238

7
Example
NC block 250: Retract the tool by 50 mm from the contour
NC block 251: Move the tool to the limit of the traverse range
250 L X+0 Y+38.5 F125 M140 MB 50 F750
251 L X+0 Y+38.5 F125 M140 MB MAX
M140 is also effective with a tilted working plane. For
machines with head rotation axes the control moves the
tool in the tool coordinate system T-CS.
With M140 MB MAX the control retracts the tool only in
the positive direction in the tool axis.
The control gleans the necessary information about the
tool axis for M140 from the tool call.
Danger of collision!
If you use M118 to modify the position of a rotary axis with
the handwheel and then execute M140, the control ignores the
superimposed values during the retraction movement. This
results in unwanted and unpredictable movements, especially
when using machines with head rotation axes. There is a danger
of collision during these retraction movements!
Do not combine M118 with M140 when using machines with
head rotation axes.
238
Miscellaneous functions | Miscellaneous functions for path behavior
NOTICE
HEIDENHAIN | TNC 620 | Klartext Programming User's Manual | 01/2022