Plasma cutter Z axis

Does anyone have any information on how the Z axis should work to get it to move the torch head at the start of the cut to get it to strike the arc?

google magic keywords would be THC (torch height control)

http://proma-elektronika.com/index.php/en/products/thc-torch-height-control

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Thanks Stephane. Having the right keywords to search with always helps :slight_smile: