Jim, Brad, thank so very much for your responses
Jim, I know this probably sounds like a stupid question but my knowledge of these things is limited. What do you mean by "jumper" pins 3 and 4?
You need to power up the plasma system, consumables in the torch, air pressure...everything ready to cut. Unplug the CPC cable on the rear panel.....locate sockets 3 and 4 on the cpc connector (they are marked...you may need a magnifying glass)....then take any small piece of wire with the ends stripped, stick one end in socket 3, the other in socket 4....the torch should fire. If it does not fire..the problem is in the plasma side of the system. If it does fire,,,the problem is in your cnc machine control box.
Jim Colt Hypertherm
You want to be "connecting" 3 and 4 from this picture using the piece of the wire.
Note: This does not involve your computer or interface cable at all, they should be disconnected from the plasma cutter. All this test does is figure out if the plasma cutter is the problem or if the interface cable/computer is the problem. If the torch fires when you connect these two pins using a short piece of wire, than you know the plasma cutter is alright and the problems is with the computer, software, parallel cable or interface cable. If it doesnt fire than you know something is wrong with the plasma cutter itself.
Note 2: You could also do a continuity test on pins 3 and 4 of the interface cable, they should connect/show resistance as opposed to infinite/beep when the computer tells it to fire.
Yep did that, it did not fire.
So I'm going to assume the problem is in the pin/socket connection since that the part I rebuilt.
So I tried to jump the thing and it didn’t fire… however I also made a discovery on the CPC connector cable. I used a multimeter to check continuity from pins to the other end of the cable (inside the CNC box) and found that there is one cable that is not continuous. It’s the one marked red in the diagram below.
Could this be the problem??