Much thanks to you both for your responses.
The problem seems to be resolved.
I did some test cuts on some small pieces and all turned out great. After I got my confidence back I cut a very detailed piece 36"x30" with 197 pierces and had no problems at all. There were a lot of holes 1/4" or smaller and them cut at 125 ipm and did have a bit of slag, but not a problem to clean up. The larger area of the piece was cut at 250 ipm and was very clean and slag free.
Unfortunately I can not say exactly what the cause was.
I took your advice Tom and checked the workclamp connections. I tightened every screw and nut connection inside the Powermax 1000, all were at least a half to quarter turn loose. I measured resistance from steel with workclamp attached back to connection inside Powermax 1000 and had about .2 ohms. I recalibrated the THC300 meter, still question accuracy after going through the alignment procedure. Now I read 70 volts at 35 amps when cutting 16ga at .065 cut height and 250 ipm.
I am still puzzled as to what happened and a bit concerned that the problem will return.
Your right Edd some people just don't get the difference.
Thanks Again.  |