Retraction From The Contour In The Tool-Axis Direction: M140 - HEIDENHAIN TNC 620 User Manual

Miscellaneous functions | Miscellaneous functions for path behavior
Retraction from the contour in the tool-axis direction:
M140
Standard behavior
In the Program Run Single Block and Program Run Full Sequence
operating modes, the control moves the tool as defined in the
NC program.
Behavior with M140
With M140 MB (move back), you can retract the tool from the
contour by a programmable distance in the direction of the tool axis.
Input
If you enter M140 in a positioning block, the control continues
the dialog and prompts you for the path the tool should use for
retracting from the contour. Enter the desired path that the tool
should follow when retracting from the contour, or press the MB MAX
soft key to move to the limit of the traverse range.
In the optional machine parameter moveBack (no.
200903), the machine tool builder defines how far before
a limit switch or a collision object a retraction movement
MB MAX should end.
In addition, you can program the feed rate at which the tool traverses
the entered path. If you do not enter a feed rate, the control moves
the tool along the entered path at rapid traverse.
Effect
M140 is effective only in the NC block in which it is programmed.
M140 becomes effective at the start of the block.
HEIDENHAIN | TNC 620 | Klartext Programming User's Manual | 01/2022
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