Besides all other process disturbances, collisions between moving axis and other components like fixtures, tables or workpieces cause long machine downtimes and high repair costs. It is therefore of utmost importance to minimize the damage following a collision. That is why reaction time is so critical for these systems. The overload detection mechanisms of the NC and the machine itself are not fast enough to avoid damages to the spindle or other parts of the machine. Collisions are the unavoidable result of mistakes in the setup or operation of the machine. Artis monitoring systems initiate an immediate stop of the feed force and thus keep the damage to a minimum.