HEIDENHAIN TNC 620 User Manual page 484

11
Example
Block 250: Retract the tool 50 mm from the contour.
Block 251: Move the tool to the limit of the traverse range.
250 L X+0 Y+38.5 F125 M140 MB 50 F750
251 L X+0 Y+38.5 F125 M140 MB MAX
M140 is also effective if the Tilt working plane function
is active. For machines with swivel heads the control
then moves the tool in the tilted coordinate system.
With M140 MB MAX you can only retract in the positive
direction.
Always define a tool call with tool axis before M140,
otherwise the traverse direction is not defined.
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.
484
Miscellaneous Functions | Miscellaneous functions for path behavior
NOTICE
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2017