HEIDENHAIN TNC 640, User Manual, Page: 494 / 948

Miscellaneous Functions | Miscellaneous functions for path behavior
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HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
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: "Handwheel superimp.",
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: "Traverse with electronic handwheels",
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.