HEIDENHAIN TNC 640 User Manual page 494

11
Example
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 and in the rotary
axis B by ±5° from the programmed value:
L X+0 Y+38.5 RL F125 M118 X1 Y1 B5
M118 is always effective in the machine coordinate
system.
If the Global Program Settings option (option 44)
is active, M118 is in effect in the coordinate
system selected most recently for handwheel
superimpositioning. To view the coordinate system
active for M118, press the 3D-ROT soft key.
Further information:
page 531
M118 is also effective in the Positioning w/ Manual
Data Input operating mode!
Virtual tool axis VT
Refer to your machine manual.
Your machine tool builder must have prepared the
control for this function.
With the virtual tool axis, you can also traverse with the handwheel
in the direction of a sloping tool on a machine with swivel heads.
To traverse in a virtual tool axis direction, select the VT axis on the
display of your handwheel.
Further information:
page 721
When using a HR 5xx handwheel, you can select the virtual axis
directly with the orange VI axis key, if necessary.
In conjunction with the M118 function, it is also possible to carry
out handwheel superimpositioning in the currently active tool axis
direction. For this purpose, program at least the spindle axis with
its permitted range of traverse in the M118 function (e.g. M118 Z5)
and select the VT axis on the handwheel.
494
Miscellaneous Functions | Miscellaneous functions for path behavior
"Handwheel superimp.",
"Traverse with electronic handwheels",
HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017