The control interrupts machining whenever a collision threatens. DCM works in automatic and manual mode. If two machine components come too close to each other, there are three warning stages: advance warning if below 14 mm clearance; warning if below 8 mm clearance; error if below 8 mm clearance.The machine operator can acknowledge advance warnings and warnings and then continue with normal axis operation. If an error message appears, DCM must be switched off. DCM only shows which machine components are endangered. It can help reduce the danger of collision but cannot eliminate it. It is the machine tool builder's responsibility to define machine components. The working space and the collision objects are described using geometric bodies such as planes, cubes and cylinders. Complex machine components can be modeled with multiple geometric bodies. The tool is automatically considered a cylinder of the tool radius (defined in the tool table). For tilting devices, the machine tool builder can use the tables for the machine kinematics also to define the collision objects. The last step of the confi guration process is defining which machine components can collide. For example, a tool touch probe on the machine table can never come into contact with the machine cabin.