- Thread starter emj225
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minimig problem
Thanks for your reply, it is much appreciated. The transformer is ok now, think it might have been damp. the soleniod will work if I put my finger on it and the trigger at the same time to complete the circuit but it won't work from the trigger. I don't seem to be able to locate the break in the circuit, if you have any ideas I would be very grateful for them
Thanks for your reply, it is much appreciated. The transformer is ok now, think it might have been damp. the soleniod will work if I put my finger on it and the trigger at the same time to complete the circuit but it won't work from the trigger. I don't seem to be able to locate the break in the circuit, if you have any ideas I would be very grateful for them
This is a gas solenoid valve unit...
And this fella is a Relay...
Both are activated when you press the torch trigger. If the gas solenoid valve was faulty you should still get wire feed but no gas. If the relay is faulty you won't get any wire feed.
This is a very simplified diagnosis as there are many other components & possible faults + different machines are wired differently. At least you now know what the bits look like though
weldequip
And this fella is a Relay...
Both are activated when you press the torch trigger. If the gas solenoid valve was faulty you should still get wire feed but no gas. If the relay is faulty you won't get any wire feed.
This is a very simplified diagnosis as there are many other components & possible faults + different machines are wired differently. At least you now know what the bits look like though
weldequip
minimig problem
Thank you for the pictures. I have not had a chance to get back to you until now - we have had a break from the welder! The relay is recognisable but soleniod valve is not like the one in the minimig. I will have another go at isolating the fault later. This forum is very helpful - thank you for your time.
Thank you for the pictures. I have not had a chance to get back to you until now - we have had a break from the welder! The relay is recognisable but soleniod valve is not like the one in the minimig. I will have another go at isolating the fault later. This forum is very helpful - thank you for your time.
Have you got a multimeter? If not you can get a digital one from from Maplins for a fiver.
Had a similar problem with a brand new welder that just stopped working. I traced the problem to a break in the circut board.
Trace the trigger voltage through the PCB to find the break or the faulty component. On my Sealey MIG the trigger voltage comes from a step down transformer at 24v AC and then is fed to the PCB via the trigger. It then goes through various components and leads to the main relay which should energise when the trigger is pressed, so one side of the relay should show a permanent 24v and the other side should be more or less at 0v until the relay is closed by pressing the trigger.
This is my thread:
http://www.mig-welding.co.uk/forum/showthread.php?t=3701
Had a similar problem with a brand new welder that just stopped working. I traced the problem to a break in the circut board.
Trace the trigger voltage through the PCB to find the break or the faulty component. On my Sealey MIG the trigger voltage comes from a step down transformer at 24v AC and then is fed to the PCB via the trigger. It then goes through various components and leads to the main relay which should energise when the trigger is pressed, so one side of the relay should show a permanent 24v and the other side should be more or less at 0v until the relay is closed by pressing the trigger.
This is my thread:
http://www.mig-welding.co.uk/forum/showthread.php?t=3701
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