I have a Langmuir crossfire pro that I’ve been working with for a while and it’s been mostly trouble free. I have been troubleshooting why the torch wouldn’t fire and realized the Z-axis cradle is broken in half which I assume means it’s not allowing an electrical connection. Can I buy another one of these?
can you post a pic of what you are talking about? the torch is fired by the relay inside the control box and shouldn’t be affected by the z axis assembly itself.
Here’s a breakdown of a Z axis assembly (be mindful of any differences, this setup has been found in the years of 2021 through 2024)
In this particular one, a small tab on mine was broken but maybe it’ll help with picturing the whole setup.
Really simple design overall, but just sharing additional pictures so I don’t give you an incorrect reference for the broken part on my old setup.
Thank you! That’s helpful. I need to disassemble it and see if I can just weld it?
I’m not understanding what part broke exactly?
The plastic? Langmuir will sell you one as they sent me one for mine.
The only metal parts are the steel rods, the aluminum mounting plate (black), and the aluminum assembly (black). The “contacts” for the IHS switch are two small copper plates. The black item riding up and down the leadscrew is a leadnut and that is also plastic.
From the first photo that looks like exactly the same part that broke on yours
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Ahh gotcha; my eyes were playing tricks on me and I sort of assumed that until he asked about welding it back together 
There’s a member on here that sells an upgraded replacement, forget his username.
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In a pinch I’m sure that plastic part could be printed out temporarily.
It also looks like his bottom contact is loose and weirdly off to one side. It’s sitting at 45° instead of right on top of that other piece of plastic
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Didn’t realize it was plastic! That’s not ideal
New bottom contact part installed. Still can’t get torch to fire. Torch holder moves independently from the bottom screw part. Should it? In the top photo I’m holding it up. I assume those two contacts should be together. Thanks fellas
The verbiage is confusing me so I’ll just share this - yes the two contact points will always remain closed.
They only open after IHS occurs which is the probing of material when the torch touches down off your steel. When the contacts break the circuit, the IHS indicator will light up in Firecontrol and prompt Firecontrol that “we have found our material”.
After which it jogs back upward based on the values in your g-code.
As for the not firing issue, you will definitely need to add much more information such as what you’re running, what troubleshooting you’ve done, and the results of all that.
Such as, we don’t even know if you have good consumables or not on the torch. Or we don’t know if you even tried firing the torch manually whether it’s directly from the plasma cutter itself, or if you shorted the ON/OFF barrel plug with a paper clip. You could have a bad regulator in the mix within your air supply too, but we don’t know what you have and don’t have as I’ve seen a bad regulator cause this same issue.
Lots of missing information, but once you share thoroughly what you’ve done, it’s anyone’s guess and lots of suggestions will be thrown your way.
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It’s this guy. Just replying to an earlier comment. I bought the extensions. I like them. As far as the update to this post, I don’t know what’s going on.
edit…. @Chops24 Well yeah the torch won’t fire if the IHS contacts aren’t touching. Are you getting an error message in fire control?
those parts should stay in contact and jog up and down together. You’ve most likely put something back together wrong.
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They are supposed to move independently. That’s how the IHS system works. Torch touches the metal, screw keeps driving until the contacts separate. Z axis changes direction and the contacts touch again. Z zero is set at that point.
Those contacts don’t have anything to do with firing the torch, other than causing Firecontrol to throw the “not in expected state” error. Are you getting that error?
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I missed the part where he said he was holding it up in the top photo. My bad…. I thought it was just jogging up and losing connection.
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Sorry guys, Air Force guy and in and out of town a lot and DEFINITELY not an internet person. New consumables, jumped the barrel plug at the machine, this triggers air but no torch fire. Running a test in fire control fails to fire the torch, using manual torch fire in fire control fails to fire the torch. I hear the relay click in the computer box on the machine.
if you jumped the barrel plug and only air comes out then the issue is with the cutter itself and not the table.
which cutter do you have? if you have a hand torch, have you tried to fire it using the that torch and pulling the trigger?