July 2013 8.6 DCM – Dynamic Collision Monitoring 1427
Machine parameter MP1294 can be set to attain higher traversing speeds in
the Manual Operation and Electronic Handwheel operating modes when
DCM is active. If you set MP1294 = 1, you can only move one axis in the
Manual Operation and El. Handwheel operating modes at any one time. This
simplifies the calculation of possible collisions and the axis can be moved at a
higher feed rate.
MP1294 Increased traversing speed for DCM by moving only one
axis
Input: 0: Function inactive
1: Function active
If you want to execute a specific motion that reduces the distance between
the two collision objects, you must deactivate DCM collision monitoring for
the manual operating mode.
Press the Collision soft key.
In the "Collision Monitoring (DCM)" menu, set it to Inactive for manual
operation.
Press the End soft key.
Move the axes manually (axis keys) without collision monitoring.
When finished, reactivate collision monitoring.
Press the Collision soft key.
Set collision monitoring in the "Collision Monitoring (DCM)" menu to Active
again.
Press the End soft key.
In the Positioning with Manual Data Input, Program Run Single Block,
smarT.NC and Program Run Full Sequence operating modes, the motion is
considered block-by-block. For example, in the Program Run, Full Sequence
mode, the NC program is stopped in the block in which the minimum safe
distance calculated by the iTNC would be exceeded. This safe distance is
calculated by the iTNC 530 dynamically. It results from the requirement that
the traverse motion can be stopped in time at any time, taking the feed rate
and direction into account. As soon as a traverse motion would result in a
distance 5 mm less than the calculated safe distance, the motion is stopped
or not performed before the traverse block is executed, and an error message
is output.
In an NC program with many small traverse blocks and high traverse speeds,
this would mean, for example: If two machine components are on a collision
course, then after DCM has braked and stopped the motion, the components
would be between 0 mm and 5 mm from each other.
Collision monitoring is not active on a machine during reference run
(incremental encoders). On machines with absolute path encoders, DCM is
active as soon as the machine is switched on.
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