power shuts off and then....

[Superbad]

....comes back on after a minute. It happen when the wire gets first contact on the metal. It might be the swan neck metal liner,clogged up with plastic. I might just burn off the plastic,to see if it is the cause. It's a SIP 150

 

[Wozzaaah]

Can you elaborate? Are you saying that once the wire contacts the workpiece the machine goes dead?
Does the wire continue to feed?

 

[Superbad]

that is correct Woz. The wire doesn't feed through after power cut out

 

[Superbad]

It's not just when it makes first contact,it's when I press the gun button. Here's a lovely video showing the defect on my welder (click on picture)

 

[Superbad]

Took the panel off today,and I've spotted the fault
http://www.welduk.com/Details.asp?ProductID=643
It's the top right corner component that has the transparent housing that's causing the grief

 

[shenion]

That would be the relay.

See if you can get the part number off it to find a replacement.

 

[Superbad]

Fixed...Yipppee!!

As shenion mentioned,it was the relay. Got one off ebay for 4 quid,but was unsure,because the relay I took off had 6 pins in total. The one I received had 8 pins

The 6 pins at the end caused me to question whether it is suited. Choosing to bend away 2 pins,and keep 4 pins to match the pcb. Tested it yesterday,resolved