ironhoarder
Cast Iron
- Joined
- Oct 9, 2005
- Location
- Waterford, VA USA
I have the use of a little Hobart Airforce 250a plasma cutter if I can get it running. A friend had used this a little guy for some ornamental steel cutting work, then lended it out to somebody. She got it back, and the next time she tried to use it, it didn't work. She told me that if I can get it running, we can share the use of it.
I have never had my hands on a plasma cutter before, and I look forward to getting this thing on the air. It has pretty small capacity (1/4" steel) but should be handy anyway.
Symptoms: power on, power light comes on as well as the "trouble" light, the fan spins up. The built-in compressor does not come on. I have verified that the compressor itself works by supplying 12v to it. It seems to be in shutdown mode, which can be from overheating, improper supply voltage, or shield cup is not in place. When I squeeze the trigger, I get nothing- no relay click or anything.
I am guessing that possibly the circuit that verifies the cup may be confused. I am assuming that it has some way of verifying that the shield cup is in place by checking continuity between 2 points in the torch. I need to check this carefully with an ohmmeter.
Obviously it is not overheated, but maybe the sensor is confused??
This unit has seen very little use. It looks essentially new and the electrode has only a tiny little dimple, indicating a small amount of wear.
Any suggestions out there of what to look for?
Thanks
Leon
I have never had my hands on a plasma cutter before, and I look forward to getting this thing on the air. It has pretty small capacity (1/4" steel) but should be handy anyway.
Symptoms: power on, power light comes on as well as the "trouble" light, the fan spins up. The built-in compressor does not come on. I have verified that the compressor itself works by supplying 12v to it. It seems to be in shutdown mode, which can be from overheating, improper supply voltage, or shield cup is not in place. When I squeeze the trigger, I get nothing- no relay click or anything.
I am guessing that possibly the circuit that verifies the cup may be confused. I am assuming that it has some way of verifying that the shield cup is in place by checking continuity between 2 points in the torch. I need to check this carefully with an ohmmeter.
Obviously it is not overheated, but maybe the sensor is confused??
This unit has seen very little use. It looks essentially new and the electrode has only a tiny little dimple, indicating a small amount of wear.
Any suggestions out there of what to look for?
Thanks
Leon