Hypertherm HTA Rev 6.00 Operators Manual - Manual (Page 193)

Appendix B: Sensor™ THC 179
Appendix B: Sensor™ THC
Sensor™ Torch Height Control Overview
Sensor™ THC is a proprietary Automated Torch Height Control system that is designed
specifically for use with your shape cutting control. Sensor™ THC utilizes the most current
technology available to provide superior plasma cut performance with unmatched ease of use.
During the plasma cut process, variations in the distance between the torch tip and the cut
material will affect the cutting arc voltage and ultimately, the quality of the cut. Through use of an
automated torch height control to maintain the appropriate cut height for the set arc voltage, we
are able to obtain the optimum cut quality regardless of variations in plate positioning.
Sensor™ THC is operated as a separate closed loop servo axis on the control and has several
setup parameters available to customize the system for optimal performance and individual
requirements. The THC system is made up of four parts: the control, the analog input card
mounted in the control, the voltage divider card and the mechanical slide with a motor to operate
the slide. The voltage divider card, which would be mounted in the plasma power supply,
monitors the arc voltage of the cutting process at the torch then transmits 1/40
th of this voltage to
the analog input card in the control where it is multiplied up to the original value. This value is
then compared to the selected Set Arc Voltage. If the values are different, the control will raise or
lower the torch on the slide to correct the cut voltage. This Appendix will highlight the features
which are unique to the Sensor™ THC.
For operation, this feature must first be enabled in the password machine setups. Setup
parameters specific to the cut process and the THC axis will then be available for configuration.
Note: This feature is not available on control systems with the Type “B” or “M” interface
configuration.
Warning! Installation, Setup and Calibration should only be performed by trained service
personnel. Extreme care should be used when installing this product.