Originally Posted by LenMcC  yeah, that's important. i actually tried the manual cut setup first, but it didn't work. i might not be doing it properly or there was another factor in there messing it up. i ran it in manual mode, watched the steady voltage (which was around 130V, if I remember right), entered that as the voltage, ran the cut again in auto mode, and the torch just ran away from the table the whole cut. Then I entered the recommended voltage of 108V (from the table in that PDF you posted) and the cuts were very good. ...Except for a few where the torch dragged hard enough to lose position. I figured out that on those cuts the torch was trying to fire directly over a slat.
Thinking about it more, I don't see how cuts directly over and in line with a slat would ever come out well. I suppose I could offset the slat supports on one side of the table to angle the slats so the torch traveling in the y direction won't ever be trying to cut directly on a slat. Or am I thinking too hard? |
If the torch is dragging on the material, the voltage is set too low. If you wanted to use that as a starting point you would increase the voltage by mabey 5 volts at a time until it was running at the correct voltage.
Some people do angle their slats so that if they are cutting squares or the like, they aren't cutting directly on top of a slat. Even with the AVHC in automatic, cutting directly down the slat shouldn't effect the arc voltage enough to cause sparatic behavior.
What do you mean by the torch was running away from the table?