HEIDENHAIN TNC 620 E, User Manual

Page: 481 / 840

Miscellaneous Functions | Miscellaneous functions for path behavior
11
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2017
481
Superimposing handwheel positioning during
program run: M118 (software option Miscellaneous
functions)
Standard behavior
In the Program Run operating modes, the control moves the tool as
defined in the NC program.
Behavior with M118
M118
permits manual corrections by handwheel during the
program run. For this purpose, you program
M118
and enter an
axis-specific value (linear or rotary axis).
NOTICE
Danger of collision!
If you use the
M118
function to modify the position of a
rotary axis with the handwheel and then execute the
M140
function, the control ignores the superimposed values with the
retraction movement. This results in unwanted and unpredictable
movements, especially when using machines with head rotation
axes. There is a danger of collision during these compensating
movements!
Do not combine
M118
with
M140
when using machines with
head rotation axes.
Input
If you enter
M118
in a positioning block, the control continues the
dialog for this block by prompting you for the axis-specific values.
The coordinates are entered with the orange axis direction buttons
or the ASCII keyboard.
Effect
To cancel handwheel positioning, program
M118
once again
without coordinate input.
M118
becomes effective at the start of the block.