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Capacitive Cutting Head
The Capacitive Cutting Head system uses the capacitance measured between the cutting nozzle and the grounded
material to maintain the proper standoff for cutting. This distance must be maintained so that the focal point of the
laser beam is always at the material surface. Finding the focal point and properly calibrating the Capacitive Cutting
Head must be completed in order to cut slag-free parts.
The components of the Capacitive Cutting Head system are the Height Sensing Unit (HSU), the large coax cable
connecting the HSU and the transformer, the transformer, the small coax cable or interface wire between the
transformer and the cutting head, the capacitive head or tip retainer, and the gas tip (shown below). The calibration
of the HSU is completed once the nozzle standoff has been set.
The Height Sense Unit (HSU) is calibrated at installation, but operators should calibrate the HSU weekly or if one
of the following actions takes place:
* Gas Jet Tip, Tip Retainer, or Tip Retainer Nut is removed or replaced.
* Lower or small coaxial cable is removed or replaced.
* Large coaxial cable is removed or replaced.
* Tip Adjusting Nut is readjusted.
* The operator becomes unsure about the accuracy of the settings.
