HEIDENHAIN TNC 620 User Manual page 383

Superimposing handwheel positioning during
program run: M118 (Miscellaneous Functions
software option)
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.
Danger of collision!
If you modify the position of a rotary axis with the
handwheel superimposition M118 function and then
run M140, the TNC ignores the superimposed values
with the retraction movement.
This may cause undesired motion or collisions on
machines with rotary axes in the head.
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.
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2015
Miscellaneous functions for path behavior 10.4
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