Torch Won't Fire (I've read many threads)

Getting tired of having to ask for help with this thing, but here we are again.

This time, I initially got the error stating that the torch was moving before sensing voltage, blah, blah, blah.

Current setup and process:
Crossfire Pro
Razorweld X45 with machine torch and THC
120psi run through HF chiller/dryer from compressor to back of machine (total run 26 feet of 1/2" air line)
New consumables from Langmuir

Trying to cut 16ga HRS
28 amps
70 ipm
.8 pierce delay
.06 cut height
.12 pierce height

I have run through all of the threads on the forums and none of them worked.

I have tried the following with no success:

  1. checked and confirmed my pierce delay was above .5 (was at .8 in both Fusion and G-Code)
  2. checked all plugs and all were seated firmly
  3. even went as far as to bend the pin in the Torch Fire port on the control box to make sure connection is good to inside wall of barrel connector
  4. opened up the box and confirmed that the relay was seated tightly
  5. Confirmed 120 psi to the back of the plasma and 70 on the onboard pressure gauge
  6. new consumables
  7. work clamp/magnet on the sheet

Torch was working immediately prior when I cut the 4x8’ sheet down to 32x48" sheets. Now, torch will not fire, not even air, when I try to fire the torch through Fire Control. I do NOT hear a click from the relay when I try and manually fire the torch through Fire Control.

Thoughts? Ideas? Getting rather tired of this thing working and then not working. I spend more time on the forums/FB group than I do cutting.

if you 're not hearing the CLICK from the relay then its most likely bad. i believe there was a troubleshooting pdf for testing the relay around hear somewhere.

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Just did a search on the forums and couldn’t find the guide you mentioned.

Guess it’s another support ticket.

This will find you a few “Torch Not Firing - Troubleshooting Guide”

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Since you are not hearing the relay click in the control box, as NicaDd said, the relay is probably bad. But you could also test the wire and connections of the Torch on/off wire at the enclosure box:

Caution: Be sure that the torch is in a safe position for firing.

If this fires the torch then it will confirm that the relay is bad or the connection of the USB cable is bad.

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I think there were some that also had bad boards

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Jumpered the torch and it fired. Called support, they’re sending out a new relay.

Can’t wait to see what’s next! /sarcasm

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No joy in Mudville.

Relay did nothing, but at least I have a spare now. Sending out new motion control board and torch om/off port to cover as many bases as possible. @langmuir-zack was great.

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Did you jump it right at the plasma cutter or did you jump it at the end of The wire. The only reason I ask you could eliminate the wire as the culprit.

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I jumped it at the plug end.

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Just a thought… I read that you have 120psi and 70psi. You mightwant to look at the 70 psi again. I had a similar issue and found that what I thought was enough air pressure was NOT enough. When I bumped mine up to 80 ish it worked fine. Not a pro to be sure but it did work! AND it is easy to do. Just a thought. Good Luck!

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Appreciate the idea. Thank you.

Considering how little my psi drops when the torch fires, it’s one the list, but pretty far down. The gauge doesn’t seem to be malfunctioning, so I’ll keep my eyes on it. Thanks again.

good Luck. this stuff can be frustrating!!

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as easy as this is to test it should be at the top of your list

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Considering it doesn’t even try to fire or blow any air at all, it’s down the list. But thanks.

So, the replacement relay didn’t fix it. They sent a new motion control board. Made it worse.

Long story short, Fire Control now won’t see the machine. I went through all of the machinations on installing and reinstalling and nothing changed. Even on a different computer.

They are now sending out a complete new control box.

Another week wasted.

Machine torch or hand torch? How is it mounted in the machine? Have you checked if the electrode is not stuck inside the torch head? Please send us pictures of the torch mounted in the holder.https://youtu.be/2hyaNRC3tv8?si=9Yy9t1r63wB7_PSD

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It would give you more things that you “ruled out” if you gave a try of what Tim suggested. Gauges sometimes fail:

What if the issue is past the gauge? A blockage of some sort or a sticky valve? Without air, you will not get fire as most torches need that air to move parts in the torch.

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Machine torch or hand torch? How is it mounted in the machine? Have you checked if the electrode is not stuck inside the torch head? Please send us pictures of the torch mounted in the holder.

Machine torch, using Jeremy’s magnetic breakaway torch mount. It’s above the seam. All consumables have been swapped several times and the spring back works as it should.

Jim, I fully understand what’s been suggested and what of 200,000,000 things could be going wrong in regards to air (pressure, quality, volume, etc). And I also understand that gauges fail. But in my experience, when gauges generally fail, they fail down. Meaning, they don’t move off of zero or they get stuck in place. Since mine was moving the last time it fired, I am doubting the problem being a failed gauge. I have not experienced a gauge failing up, meaning reading higher than what is actually there. Mechanically, it’s highly unlikely that that’s happening when the torch fires. However, since the torch wasn’t firing before and certainly isn’t firing now since I can’t even connect to the machine to test fire it, it’s not on my list of suspects at this point.

I do very much appreciate the help from everybody here. As noted above, I’m working with Langmuir’s support staff to rectify the issue. I’m using this thread more of as documentation for others who might potentially run into the myriad problems I am and have been experiencing with this machine since I got it.