Upgrading Chinese Plasma?

rodw wrote:

If you had step and direction signals for the Z axis, there are external THC controls designed to be retrofitted to machines in this class that act independently of the motion control. Robot3T may have a solution that works with your Z axis motor.

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Yeah I have looked into the Proma THC when I was designing my controller but THCAD and PlasmaC are in my opinion superior to the bit bang THC's. But it might be a low cost option for Buck that might get him out of trouble.

Buck,

Have a look at the Manual posted in this thread,

forum.linuxcnc.org/plasmac/38311-is-it-c...-external-thc#156281

The THC the OP has might work with your machine,