HEIDENHAIN iTNC 530 (340 49x-04) - Manual (Page 317)

HEIDENHAIN iTNC 530 317
7.
4 Miscellaneous F
unctions f
o
r Cont
our
ing Beha
vior
Retraction from the contour in the tool-axis
direction: M140
Standard behavior
In the program run modes, the TNC moves the tool as defined in the
part program.
Behavior with M140
With M140 MB (move back) you can enter a path in the direction of
the tool axis for departure from the contour.
Input
If you enter M140 in a positioning block, the TNC continues the dialog
and asks for the desired path of tool departure from the contour. Enter
the requested path that the tool should follow when departing the
contour, or press the MB MAX soft key to move to the limit of the
traverse range.
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 TNC moves the
tool along the entered path at rapid traverse.
Effect
M140 is effective only in the block in which it is programmed.
M140 becomes effective at the start of the block.