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Put a wire between pins 3 and 4 on the back of the plasma cutter.Originally Posted by vaheeez
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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?
- V
Put a wire between pins 3 and 4 on the back of the plasma cutter.
Is there a specific type of wire I should use?
Nope, anything on hand will do.
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
Should the torch fire as soon as the two sockets are connected and the power is turned back on?
I'm assuming so because if my CPC cable is disconnected, I can not tell it to fire through my machine interface correct?
- V
What Jim is asking you to do is to completely remove your interface cable from the plasma cutter. Then on the back of the machine, take a piece of wire and touch it to contact 3 and contact 4. When these two contacts are connected the torch should fire its pilot arc. If you have a hand torch connected make sure someone is holding it or if its a machine torch make sure nothing is blocking the end.
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.
- V
You rebuilt the pins in the plasma cutter also?? The test above has nothing to do with the interface cable just the port on the back of the plasma cutter.
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??
Pin 6 is part of the voltage divider, would not affect torch firing but could affect THC depending on how it is hooked up. Let me clear this up, with the plasma cutter alone. Touching pin 3 to pin 4 on the back of the plasma cutter causes nothing to happen?
Well I get an error on my machine, 0-51 [Start trigger signal on at power up]
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