HEIDENHAIN TNC 640 (34059x-05) ISO programming - Manual (Page 380)

Programming: Special functions
11.2 Dynamic Collision Monitoring (Option #40)
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TNC 640 | User's ManualDIN/ISO Programming | 1/2015
Collision monitoring in the manual operating modes
In the Manual operation and Electronic handwheel operating
modes, the TNC stops a motion if two objects monitored for
collision approach each other within a distance of less than 2 mm.
In this case, the TNC displays an error message naming the two
objects causing collision.
Before the collision warning, the TNC dynamically reduces the feed
of the movements to ensure that the axes stop in good time before
a collision.
If you have selected a screen layout in which collision objects are
on the right, then the TNC additionally marks the colliding objects
in red.
Once a collision warning is displayed, machine
motions via the direction keys or handwheel are
possible only if the motion increases the distance
between the collision objects.
Motions that reduce the distance or leave it
unchanged are not allowed as long as collision
monitoring is active.
To deactivate collision monitoring, see "Activating and
deactivating collision monitoring", page 382.
Note the generally valid constraints, see "Function",
page 377