HEIDENHAIN TNC 320 (340 551-01) - Manual (Page 169)

HEIDENHAIN TNC 320 169
7.
4 Miscellaneous F
u
nctions f
o
r Cont
our
ing Beha
vior
Superimposing handwheel positioning during
program run: M118
Standard behavior
In the program run modes, the TNC moves the tool as defined in the
part program.
Behavior with M118
M118 permits manual corrections by handwheel during program run.
Just program M118 and enter an axis-specific value (linear or rotary
axis) in millimeters.
Input
If you enter M118 in a positioning block, the TNC continues the dialog
for this block by asking you the axis-specific values. Use the ENTER
key to switch the axis letters.
Effect
Cancel handwheel positioning by programming M118 once again
without coordinate input.
M118 becomes effective at the start of block.
Example NC blocks
If you want to be able to use the handwheel during program run to
move the tool in the working plane X/Y by ±1 mm from the
programmed value:
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 M104
With M140 MB (move back) you can enter a path in the direction of
the tool axis for departure from the contour.
L X+0 Y+38.5 RL F125 M118 X1 Y1
M118 also functions in the Positioning with MDI mode of
operation!
If M118 is active, the MANUAL OPERATION function is
not available after a program interruption.