i havent ever done this, however i understand what @mechanic416 is saying there. If you have not successfully fired your machine torch…but you can fire your hand torch, then in my mind the next logical step is to insure the machine torch fires by following @mechanic416 directions. That way you rule out bad torch lead and torch head before delving deaper into the plasma machine itself.
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Update: i remived the cover and can hear the relay activating. I unplugged all connections are reconnected. I am able to get the torch to fire now. Something is still wrong, it is eating consumables. I have a piece of 1/4 plate on table, ground for good ground connection, 45 amps on machine with 70psi air. My air is dry. From the 60gal compressor it goes to a moisture seperator then to a refrigerated dryer then about 40ft of pex to an air drop. From the drop it goes to a motorguard filter before entering machine. I removed the motorguard filter and it is dry. In firecontrol i selected straight cut at 3" length, 40ipm, .5 pd. Torch fires but does not go thru material. Only leaves a slight mark on surface of plate. Consumable is welded closed. Live voltage said 30. Any ideas where to troubleshoot next?
You need some brand new consumables to start.
How long were those consumables in, how much cut time did you have on them?
They were brand new. That is from a 3" straight cut that never went thru the material
,5 seconds is not long enough to pierce 1/4" material. It probably destroyed the electrode and nozzle because of all of the molten metal blowing back into it. 40 IPM is also pretty ambitious for a Razorweld at 45 amps on 1/4" material.
Try that test again with a 1 second pierce delay and 20 IPM.
Is that 70psi flowing or static? You need 70psi while the air is flowing and you probably need to open the machine and crank up the internal regulator to get it to go that high.
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Not razorweld, prime cut60. I did try that, went to .9pd and 25ipm. No change. The live voltage only reads 30. That seems to be the issue. I just dont know where to start lookig to reaolve this.
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Turn off thc and set pierce delay to 1. sec. Make sure you have 70-75 psi at torch output.
Sounds like it’s not transferring from pilot arc to cutting arc. I’d try the hand torch to make sure the torch isn’t the problem.
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My thoughts exactly. Between the no fire issue yesterday and now this…to me it sounds like lack of transition or the electrode is not moving in head freely.
Do you maintain your 70 PSI while cutting?
What diameter of PEX tubing are using?
Even though you do have a lot of good air drying equipment you will not achieve the air quality needed for plasma with that setup.
The lowest pressure dew point you could achieve with that set up of yours is just above 0° c or 32 f. Where the goal is to have a pressure dew point of minus -40c or -40f.
A desiccant cell in addition to your existing equipment is absolutely required to achieve the air quality needed for plasma. While many people don’t use one and it does work, and it will reduce your consumable life and cut quality and reduce the life of your overall equipment.
How does the nozzle look can you take a picture of your nozzle and post it?
Yes i do maintain the psi. 1/2" pex. I can add a desiccant filter in and try that. This is crazy, now i am back to where i started with the error message and no fire. I have taken apart the z axis ckeaned the contacts and nothing. I have a brand new machine torch, installed it and nothing. I am at a loss.
You have a new electrode in there now?
Maybe a Manufacturing defect with that particular electrode that failed.
Yes, new torch and all new consumables. Hand torch by itself straight to plasma cutter works fine.
I have tried several different electrodes
which error message is being displayed now during the failure?
can you manual fire the torch in firecontrol?
which nozzles are you using?
If you would like, you can call me and I can try and help you with this.
George
302-690-6995
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Update: Big shout out to George for helping me today. Everything is back to working as it should. I wish i was able to identify the problem but i am u sure of what it was. He had me disconnect and ohm meter the torch fire wires and cnc port connector. Removed the torch consumables and reinstalled. Disconnected the torch to the plasma and reconnected. Somewhere in this was the fix.
Thanks to all for the comments and thank you George for walking me through.
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Hello, I’m tagging on the DW1’s question because I’m having the same problem that you described the torch firing very quickly and then turns off and throws a misfire detected code.
I am not for sure what the fix was as we were never able to identify the issue. After all the trouble shooting it worked fine. Wish i could give you a better answer. I have had the THC cause a lot of issues over the last few years. I now turn it off on all cuts. That has solved a lot of problems.
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Ok, Thank you for the help.