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Hypertherm PHC Sensor User Manual

Page 45

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Section 3: Operation

45

Section 3: Operation


Automated torch height control (THC) systems used in mechanized plasma cutting are used to provide the
optimum height for the desired metal cutting process. The appropriate cut height is crucial to the plasma
process to provide the ability to transfer the Arc to the work piece for piercing / cutting and for optimum cut
quality (bevel angle, etc).



With the plasma process there is a direct relationship between the cut voltage and the torch height (gap
between the metal work surface and the torch electrode). By using the automated control to monitor the
working arc (cut) voltage, it can then control the THC to maintain a specific voltage set point.