Help! Snap on (Cebora) mini mig 180 Part not working

[Screwdriver]

Thanks Graham, great find, I'll bookmark it.

Bit fiddly to whip the contactor out and even more of a fiddle to strip it so I checked the torch switch first. Connectors look good.

The wires ping out and the switch just stamps two connectors onto a spring loaded washer. What could possibly go wrong?

Incredibly, the switch did not make a circuit. Must be some crazy insulating crud under there.

Anyhow, cleaned it off the brass washer and reassembled. No I dea what this type of torch is but it is a quality item. Not only does it permit easy repair, even the springs are formed and ground flat. Don't often see that these days. Anyhow, now it does ping out and before I even go back out to refit, I am 99% confident it's fixed.

I might clean out the unit now it's apart but that could do more harm than good I suppose...

<PS> That's not the spring I refer to. The other one that provides the switch action is the impressive specimen. The one shown goes under the brass washer.

 

[a111r]

The O ring's missing off your gas connection. But maybe you know that.

 

[eddie49]

If you do need to replace the contactor, confirm the required coil voltage. From the attached schematic, it's probably 24v.

 

[Screwdriver]

The O ring's missing off your gas connection. But maybe you know that.

Uh. Yes?

 

[Screwdriver]

Only took that picture because I was going to ask what type of torch it is. I couldn't see that with my eyes (!) but now I look at the picture...

No reverse on this thing so another waste of wire. I might do something silly just to save myself some wire, while I fetch a sensible size O ring.

 

[eddie49]

Uh. Yes?

The small brass tube on the Euro plug, next to the two switch contact pins, with the ( empty ) groove.

 

[Screwdriver]

The small brass tube on the Euro plug, next to the two switch contact pins, with the ( empty ) groove.

Yeah well I can see it NOW...

 

[Screwdriver]

 

[Screwdriver]

Big thanks to @a111r for spotting the missing O ring and pointing it out.

I put an extra one on because it's the best I can do with what's on hand. Works though so unless I can find out what this model of torch is, that's as good as it gets.

The other plain "tube" is another unknown quantity. Could be just a locating dowel to stop you from destroying the switch pins but it does have a hole in it and it also looks like it might want an O ring.

 

[a111r]

No, that's the liner, it doesn't need one.
The small tube is the gas line. It does need one... They're a standard size for Euro torches. I forget which size, so will post up when I find it.

4 mm ID x 1 mm csa.
Couple of quid for 10, or under £6 for 100.

https://www.ebay.co.uk/itm/Metric-Nitrile-Rubber-O-Rings-1mm-Cross-Section-1mm-30mm-ID-Oring-O-Rings-UK/362932269713?

Or you can buy 5 for £10 from a 'specialist'... https://www.ebay.co.uk/itm/MIG-Euro-Connect-Central-Adaptor-Gas-Oring-5-Pack-B1524-/122341191810

 

[a111r]

Well mines running brilliantly now I washed it in hot soapy water . The mobile engineer sorted it although I didn’t get chance to chat with him. There was a ‘high frequency’ thing not working. The only thing now is my main power/ on switch is not working properly on full (7) which it did before it’s wash. Part number washed off it btw therefore can’t order correct item but never mind. Engineer only charged me £50 and even treated me to a new massive earth clamp! Happy

Good result, well partially. Soapy water's a new one on me, re. electronics!
I wonder what the 'high frequency' part was? Perhaps he meant a transistor on the PCB, gate switching?

Try some spray lube in the rotary switch. Don't force it ... or worse, take it apart. It will more than likely be made by 'Bremas'. Replacements can be hard to find new.
Maybe you don't need position and can live with it..

 

[Weeman]

Thanks Graham, great find, I'll bookmark it.

Bit fiddly to whip the contactor out and even more of a fiddle to strip it so I checked the torch switch first. Connectors look good.

The wires ping out and the switch just stamps two connectors onto a spring loaded washer. What could possibly go wrong?

Incredibly, the switch did not make a circuit. Must be some crazy insulating crud under there.

Anyhow, cleaned it off the brass washer and reassembled. No I dea what this type of torch is but it is a quality item. Not only does it permit easy repair, even the springs are formed and ground flat. Don't often see that these days. Anyhow, now it does ping out and before I even go back out to refit, I am 99% confident it's fixed.

I might clean out the unit now it's apart but that could do more harm than good I suppose...

<PS> That's not the spring I refer to. The other one that provides the switch action is the impressive specimen. The one shown goes under the brass washer.

Any chance you could post up some good pics of the backside of the euro connector where it goes into the wire feeder and the backside of the front panel/ female connector side? I'm thinking of converting mine to the euro connector/torch and wondering what the genuine oem euro receptor looks like from the rear. Cheers

 

[Screwdriver]

Any chance you could post up some good pics of the backside of the euro connector where it goes into the wire feeder and the backside of the front panel/ female connector side? I'm thinking of converting mine to the euro connector/torch and wondering what the genuine oem euro receptor looks like from the rear. Cheers

The unit is wedged in between a wall and an immovable object under a shelf behind a vertical bandsaw. In front of that is my anvil and swage block. It took a day to get to it last time and I am not keen to do that again having put it back.

I may be able to crack the door open and shove a camera in there but don't hold your breath. I did find a parts diagram for it which also suggests the item DOES NOT require an O ring! But there's an O ring (or two) in there now and it's not doing any harm.

I'll see if I can find the diagram...