Contactless distance control for laser cutting processes

Traverse paths of laser equipment are predetermined by means of programmed paths. However, component tolerances and thermal distortion cause irregular standoff distances between the workpiece and the cutting nozzle. Even minor differences of a few tenths of a millimeter lead to a deterioration in cutting quality. Constant, optimum cutting quality and speed can only be achieved if the cutting nozzle and the focus are positioned correctly in relation to the workpiece surface - an automatic distance control device is therefore advantageous.

Due to the wide range of applications, the analysis of the measured distance signals is carried out with the help of the Lasermatic® or Lasermatic® Z system.

Lasermatic® - system:

The differences between these are that the Lasermatic® system is extremely robust and when cutting materials, attains a level of plasma disturbance suppression which is unusually high in the field of capacitive measuring technology. This system is also suitable for reliable signal transfer via rotary slip rings on robot equipment.

Lasermatic® Z - system

The Lasermatic® Z - System is particularly suitable for use with solid-state laser robot applications. Precitec supplies very slim nozzle electrodes for this type of technology. The nozzles have minimum sensitivity to the lateral disrupting effects of capacitive measurement. Compared to other capacitive distance measuring systems, both of these measurement techniques possess very short reaction times, a very low temperature drift and an exceptionally wide capacitive measuring range in relation to the spot to be measured.

Subject to change without notice.

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