Losing live voltage during cut

CrossFire ® PRO
41

I’ve re-read the thread, and I don’t see any statements about how you’re connected to the plasma cutter. (You may be fine, but let’s verify)

The loss of voltage in THC leads me to believe you may have an incorrect wiring inside the plasma cutter. Given your statement that you are running RAW voltage, the connections are simple on the THC box, RED & BLACK. Givin that you get “some” voltage, I’ll say you’re not connected backwards.

Can you verify how you’re connected to the plasma (Everlast) cutter?

Edit - Unless the initial cuts that worked have a valid (read > 100V) measurement.

6 Likes
42

I have had my Everlast 62I CNC hooked up bout 2-3 months. I hooked it to raw voltage from following I think his name is Toolboys pic. I have it hooked up right to the lugs of machine. It had been running fine until the incident the other day.

43

Have you checked your cable layout? Make sure the torch and work clamp isn’t touching the usb cable or THC wires. That can affect it I believe.

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44

I have drag chain set up on my table. Cables are run together through drag chains.

45

Has he tried jumping the trigger input by hand to see if it will consistently fire at the input connector

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46

I don’t know how to do that.

47

He just means disconnect the cable going to the enclosure at the [Torch on/off] port:

Enclosure connections
Enclosure connections696×564 147 KB

And short across the two parts of the barrel connector with something metal (wire, screw driver). It is low voltage and just completing a connection of the wire to show that the torch would respond if it got an actual signal to fire.

Note: make sure that the torch is not going to damage something if it were to fire.

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48

I gotcha, let me get home and I’ll try it

49

Tweezers work good or needle nose. Maybe flat blade screwdriver.

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50

I did that test with the barral connector. It triggered the plasma cutter.

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51

That tells us that the problem is inside the electronics enclosure. Either a bad relay or one of the wires from the relay to the port is disconnected.

3 Likes
52

That isn’t good then is it?

How would I narrow it down

53

Start with opening the case and checking the connections on the two wires at the back of the torch on/off port.

If those are good, locate the relay on the board and make sure it is fully seated.

Press the torch fire button in Firecontrol and listen for the relay to click.

Fully seated relay with no click means bad relay. Contact Langmuir for replacement.

5 Likes
54

Could be bad connection. Or not plugged in all the way. But could thc affect it not firing. If you can fire it from the cutter then at least the trigger in out is working. But if air gets low it could cut off while running snd then on the next cut. Have you tried running some cuts and watching the air gauge. See if it stops cutting at some drop on the gauge.

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55

THC can not affect torch firing. It will stop the program, if the torch doesn’t fire, but it doesn’t have anything to do with the torch firing.

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