plasma torch height control

Tom,
Check out www.shopbottools.com . They are coming out with a plasma cutter
unit along with their routers.
They are using the idea I proposed to you some time ago. They are adding a
voltage comparator inside the plasma cutter to monitor the arc voltage. The
software then controls the height. You can also raise and lower the torch by
pressing the page up-down keys while the torch is cutting. I think that Ted
told me that he would sell the electronics (ShopBot control box and card for
the plasma unit separately. I suspect this would only be slightly more than
the control from Austr.
Regards,
Don Chandler