Hi, well today started well, took my little shopping trolley (1 lt Corsa) for its MOT after breakfast and it passed OK. Got my washing hung out on the line to dry and then it was time to do a bit of welding on my lathe stand that I'm currently making.
Got my MIG welder all set up and did a couple or three test welds to get the wire speed ect. correct and proceeded to tack the bits together. Pressed the trigger and nothing happened, no sparks, no wire feed. The light in the power switch was still on, so I could see that it hadn't tripped or anything. Tried turning it off and on again, flipped the high/low switches and still nothing, so gave it a bash on the side of the casing and away it went, for a couple or so times, so came to the conclusion that there was a loose connection somewhere.
After a long winded search and going over the control circuit board with a soldering iron on suspect joints, finally found that the mains transformers primary winding was an open circuit.

I had a hunt around in a box up in my attic where I knew I had various salvaged ones and found a suitable doner one, but it was not PCB mountable, so I plumbed it up with four short wires.

I then drill a couple of bolt holes through the front of the casing and bolted the new transformer on.

Tried it again and all was well, so put the casing back together and set up for tacking up once more. I made about three tacks and then ran out of gas. What the! I thought, it's a brand new bottle, and upon inspection I found that the body of the regulator itself had become loose, venting all the gas to the atmosphere
and more
it fact £15:00 worth of
.
On the up side, at least all my washing got dry. but no progress on my lathe stand.
Regards Nick.
Edited By Nicholas Farr on 17/05/2015 01:01:30