acuracy is good. The THC (z motor) is not used for postioning as the x and y motor are, hence you do not need an encoder. The arc voltage that you want to maintain is user set in the controller. Distance from the plate that you are cutting is measured from the arc voltage. This voltage is compared to the voltage that you have selected. Voltage to low means that the torch is too close. A signal is sent to the THC motor to move the torch up. The arc voltage is continually being checked and the controller either issues an up move, down move or nothing if the voltage is within tolorance.
HTH
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D. Paulson |