384 Programming: Special Functions
11.2 Dynamic Collision Monitoring (Software Option)
Keep these constraints in mind:
îš„ DCM helps to reduce the danger of collision. However,
the TNC cannot consider all possible constellations in
operation.
îš„ Collisions of defined machine components and the tool
with the workpiece are not detected by the TNC.
îš„ DCM can only protect those machine components from
collision that your machine tool builder has correctly
defined with regard to dimensions and position in the
machine coordinate system.
îš„ The TNC can monitor the tool only if a positive tool
radius has been defined in the tool table. The TNC
cannot monitor tools with a radius of 0 (as is often used
in drilling tools) and therefore issues an appropriate error
message.
îš„ The TNC can only monitor tools for which you have
defined positive tool lengths.
îš„ For certain tools (such as face milling cutters), the
diameter that would cause a collision can be greater
than the dimensions defined in the tool-compensation
data.
îš„ The handwheel superimpositioning function (M118 and
global program settings) in combination with collision
monitoring is only possible in stopped condition
(blinking control-in-operation symbol). To be able to use
M118 without limitations, you have to deselect DCM
either by soft key in the Collision Monitoring (DCM)
menu, or activate a kinematics model without collision
monitored objects (CMOs).
îš„ With the rigid-tapping cycles, DCM works only if the
exact interpolation of the tool axis with the spindle is
activated through MP7160.
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