Pro 90en- No longer feeds wire

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Had quite a bit of use out of my little welder, currently been using it gasless with 0.8 wire.
But was welding some steel box section the other day when the wire feeder stopped feeding completely?

The light still comes on within the ON switch, but pull the trigger and the feed motor is totally dead.
Thought it may have been the thermal circuit protection, so left it about an hour, but nope, its still dead


Any ideas?

 

[peterd51]

Hi,

how are you with electrickery?

With the mains unplugged, undo the screws and lift off the case. Double check that the mains is unplugged and then check that the various wires inside are pushed onto their connectors.

Check the circuit boards for anything that looks like it's burnt out.

Check with an ohm-meter if the wire-feed motor is open circuit.

After this is gets tricky...

keeping fingers, etc, away from anything that carries high voltage, switch the welder on and check the voltage on the motor with the trigger pressed. I think it should be 12 volts but start on the highest meter setting and work downwards until you get a reading.

You'll be able to tell at this point if it's a power failure or the motor that's burnt out.

Don't forget to set the meter for ohms or volts depending on what you're checking next and make sure that the leads are plugged in the correct sockets (common and ohms/volts, not common & the 10A socket!).

And don't forget to unplug the mains before doing anything else.

If you're not sure about anything then please ask before having a go.

Regards
Peter

 

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Ok cheers for the reply.
Will have a check later

 

[Wozzaaah]

Will it still strike an arc or is it just the wire feed that's stopped? Press the trigger and lightly touch the contact tip on the return clamp and see if it sparks. (Don't forget eye protection ) The thermal cutout will disable everything if it's cut in so if it arcs but no feed then it's not that that's failed

 

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It wouldn't arc either.

All sorted now, the trigger on the gun is a bit dodgy and was causing the problem

 

[Wozzaaah]

If you need any parts for it, send a PM to weldequip, he keeps lots of bits in stock for Clarkes.