HEIDENHAIN TNC 640 (34059x-04) ISO programming - Manual (Page 340)

Programming: Miscellaneous functions
10.4 Miscellaneous functions for path behavior
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TNC 640 | User's Manual for DIN/ISO Programming | 3/2014
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.
The handwheel superimpositioning function with
M118 in combination with collision monitoring is
only possible in stopped condition. To be able to
use M118 without limitations, you have to deselect
DCM either by soft key in the menu, or activate a
kinematics model without collision monitored objects
(CMOs)
Input
If you enter M118 in a positioning block, the TNC continues the
dialog for this block by asking you the axis-specific values. The
coordinates are entered with the orange axis direction buttons or
the ASCII keyboard.
Effect
Cancel handwheel positioning by programming M118 once again
without coordinate input.
M118 becomes effective at the start of block.
Example NC blocks
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:
N250 G01 G41 X+0 Y+38.5 F125 M118 X1 Y1 B5 *
M118 is effective in a tilted coordinate system if
you activate the tilted working plane function for
the Manual Operation mode. If the tilted working
plane function is not active for the Manual Operation
mode, the original coordinate system is effective.
M118 also functions in the Positioning with MDI
mode of operation!