A method and device for disturbance sensing in the drive system of a numerically
controlled machine tool or similar device is disclosed, in which at least one drive
motor for positioning of a machine part being moved such as an advance slide or
an X/Y cross-slide is coupled via one or more transmission elements in which the
position of the moving machine part is measured directly on the machine part and
also indirectly in at least one location in the transmission chain. Direct and
indirect position measured values are compared and the measured value comparison
value is used to record a disturbance with consideration of the actual operating
conditions, such as machining speed and acceleration/delay, optionally moved masses
and machine-specific process forces upon fulfillment of a specific criterion.
