Water vapor in the compressed air supply dramatically reduces nozzle life. I have seen a roll of toilet paper in series with the compressed air supply line used as a moisture filter. Steel cuts pretty good with compressed air but to get good cuts on other metals an alternate gas maybe required. SuperCam and a XYYZ Electronic motor are used to control the table. SuperCam has a torch mode of operation, which turns the Plasma Torch on and off automatically.
Dual gantry drive stepper motors.
Cabling for the moving motors and the Plasma Torch is suspended with pulleys from a set of steel cables over head of the XYZ Table. The metal grating table is on rollers and can be pulled out for loading and unloading material. The water vat is also on rollers, so that it can be rolled out from under the XYZ table for cleaning and changing the water, also to collect any parts that may have fallen through the gratings. The metal grating supports the metal being cut. Over a long period the grating may have to be replaced because the Plasma Torch cuts through the metal and into the grating.