After my last post I finally got around to trying a different use of the current transformer. I wrapped the work lead around the CT once and put a 15ohm resistor across it. There was NO output during either operation, cutting or firing into air.
When this all started I did as the MP1000 instructions dictate and put one wrap of one input leg (220v) through the current transformer. This would give me insignificant readings. Cutting into thin air would give me about 3v and cutting metal would give about 3.2v. Those numbers are inconsistent with electrical theory. I am thinking that my sub-par equipment (Sears multimeter and Harbor Freight am-meter) could be causeing me bogus readings.
I was really hoping to get confirmation that somebody has a used the same Plasma cutter as I and actually got it to work. I really dont want to buy another machine. Thanks for any additional help, Steve |