Patent ID: 8115440

Claim:
A method for position-accurate triggering of a machine part which is moved along at least one axis of movement relative to a workpiece and is configured to process the workpiece upon the triggering for processing the workpiece at precisely defined processing positions spaced one from another, the method comprising the steps of: providing an incremental encoder which generates a first pulse train having a rising number of position pulses as the machine part moves along the axis of movement, the number of position pulses representing a movement position of the machine part, defining a first number of pulses which represents a desired trigger position for the machine part, counting the position pulses during movement of the machine part in order to determine a current number of position pulses, comparing the current number of position pulses and the first number of pulses, and generating a first trigger signal and supplying said trigger signal to the machine part in order to trigger the machine part when the current number of position pulses corresponds to the first number of pulses, wherein the machine part is moved by means of a drive control circuit having a control algorithm, wherein the drive control circuit receives the current number of position pulses in order to determine an actual position of the machine part, wherein the drive control circuit reads the current number of position pulses cyclically with a cycle time that is greater than a time interval between two adjacent position pulses, and wherein the first trigger signal for the machine part is directly generated from the pulse train, bypassing the control algorithm of the drive control circuit.