Butters AMT 241 - Bin or Fix?

[Hutcho]

Now put the leads on the dc side and see what you get -

 

[QuattroBro]

Now put the leads on the dc side and see what you get -

OK, I'll let you know what I find. Do the same procedure I guess?

 

[QuattroBro]

So, with the terminals on the other side of the rectifier measuring DC I get,

P1 - 35v maximum spike/fluctuation down to about 14V
P2 - 64V down to 15V
P3 - 17.8V pretty steady
P4 - 20V pretty steady
P5 - 80V > 23V steady
P6 - 26V steady.

I had no idea what to expect really apart from the arcing being more vicious as the voltage went up.

 

[Hutcho]

Hmmm - should be working , voltages a tad low but not to bad
If it’s still like string then need to be looking at bad connection somewhere

 

[QuattroBro]

Hmmm - should be working , voltages a tad low but not to bad
If it’s still like string then need to be looking at bad connection somewhere

Just goes pop-pop-pop! (Not a porous crackle but a pop).
Might it be something stupid? (Apart from me?) Maybe, I just don't know what else to try. I can find no loose wires internally, I was hoping to find something obvious.
I tightened up the brass connections around the Euro(?) torch connector a few days ago also made no difference.

 

[badabec]

Try a new reel of wire?

 

[QuattroBro]

Try a new reel of wire?

Yeah, tried that, no difference. It did occur to me it could be dirty wire but no.

 

[RonMig]

I'm not I just want to get on with the car!

Many here would buy a new/cheap/disposable, superlight inverter mig & crack on with the job, then come back to this one to fix at leisure...

Then you'd have a nice portable backup mig once the butters lands the right side up...

 

[arther dailey]

presume you are getting gas at nozzle ??

 

[QuattroBro]

Many here would buy a new/cheap/disposable, superlight inverter mig & crack on with the job, then come back to this one to fix at leisure...

Then you'd have a nice portable backup mig once the butters lands the right side up...

Yeah, I think I light have to, bloomin thing. I'll try another earth cable tomorrow and see if that makes any difference. It's almost like the wire pushes the gun back due not being earthed properly a few seconds later it's fine again!

presume you are getting gas at nozzle ??

Yes, the bottle ran out a few days ago and I thought, oh it was that after all! It wasn't.

 

[eddie49]

Those high open-circuit DC voltages - 35v, 64v, and 80v - in switch positions 1, 2, and 5 are strange.
Using the Diode Test range on your meter you could check the bridge rectifier by following @Seadog 's test procedure in Post #31 of this thread:

S

Thread 'Testing diodes'

Jul 21, 2017

Can anyone explain how to test diodes as I think I may be having some problems with my machine

It's a cebora panther 180

I have a multimeter

• swedge
• Replies: 50
• forum: Cebora & Snap-on

That should be done with power off and one of the thick AC secondary wires from the main transformer to the rectifier disconnected.

 

[arther dailey]

I had to put new diodes in one of these a few years back , changed all four, worked a treat afer , all though only one was duff at the time.be carefull with the insulators when reassembling , some what fragile

 

[QuattroBro]

Those high open-circuit DC voltages - 35v, 64v, and 80v - in switch positions 1, 2, and 5 are strange.

Yeah, only happened on initial start or a flashed up on the meter intermittently. I had a quick look through that guide, I shall try, if I can get my head around that.

I had to put new diodes in one of these a few years back , changed all four, worked a treat afer , all though only one was duff at the time.be carefull with the insulators when reassembling , some what fragile

I tried to replace diodes in one a few years back and it still never worked after doing it so I'll replace the whole thing if necessary.

Simple stuff I can usually fix, more technical stuff? No chance. Thanks for your help though.