That's a coincidence Brad, I was just about to ask you what you thought of Migatronic TIGs. My second-hand Lorch purchase fell through. So I'm looking at options.It’s a Migatronic, that’s you main issue...
In all seriousness, that model is plagued with issues. Work had one, piece of crap. There’s been numerous threads just on this site from people with issues with the 325
Avoid.That's a coincidence Brad, I was just about to ask you what you thought of Migatronic TIGs. My second-hand Lorch purchase fell through. So I'm looking at options.
They never buy another one..:Are they really made in Denmark? They seem to have a good marketing and product info. and a decent story behind them. I wonder what happens on the ground when people buy and use their gear...?
No it's at the bottom just in front of contactor I have got theHello, and welcome!
Is the fuse that blows located on a printed circuit board?
Do you have any original literature for the machine, if so does it include a circuit diagram?
These earlier threads about the Migatronic 325 may be helpful:
Migatronic 325 compact
Hi! I have a problem with wire feeding. Changing the position of wire controller or any of controls wire keeps going with full speed all the time. No matter is wire freely or in action.www.mig-welding.co.ukMigatronic 325 compact problem
Just bought a 415v version second hand migatronic 325 compact wired it up think it’s wired right if I turn gas on then turn machine on gas instantly comes out of torch with out touching trigger if turn gas off pull trigger wire feeds as it should but soon as gas is on comes straight out any one...www.mig-welding.co.uk
We have had the welder and used regularly for over 20 years and never had an issue with it tillIt’s a Migatronic, that’s you main issue...
In all seriousness, that model is plagued with issues. Work had one, piece of crap. There’s been numerous threads just on this site from people with issues with the 325
It’s a Migatronic, that’s you main issue...
In all seriousness, that model is plagued with issues. Work had one, piece of crap. There’s been numerous threads just on this site from people with issues with the 325
It’s a Migatronic, that’s you main issue...
In all seriousness, that model is plagued with issues. Work had one, piece of crap. There’s been numerous threads just on this site from people with issues with the 325
The new inverters are horrible to use.The Migatronic MTE TIG sets were good, still are good in my eyes. I sold my big 440 dialog to a bloke way down south as he had two of them getting on in years and wanted a backup. They're old fashioned transformer square wave machines, similar to a Syncrowave, but not as refined.
I'm not sure about the newer Migatronic inverter TIG sets though, I'm sure they're really nice to use, but no idea on longevity/backup. I'd say backup would be the main issue.
That fuse blowing malarky happened to my Migatronic and it was the auxiliary transformer thingy, think I posted it (photos )on here a while ago now.As a first step on a 20-year old machine, maybe it needs a good clean-out with an air hose and a vacuum. Any grinding dust inside could conduct electricity and cause a short-circuit.
There is a rather clearer circuit diagram here:
Since the fuse blows immediately when you turn the machine on, before you press the torch trigger, this implies it is the auxiliary power transformer that has failed. It could also be the fan, since that is tapped off across the primary of that transformer.Elektrotanya for electronics experts
Electronics forum for electronics experts to repair defective appliance.elektrotanya.com
Do you still have the original fuse that blew initially? If it was a 1.6 Amp fuse, then, according to your photo in post #11 above, the aux transformer is wired for 220 v. If that transformer is running on 380 or 415v, the fuse should have been 800mA.
This auxiliary transformer is much smaller than the main welding power transformer; its probably about 4 inches square. It supplies the power control electronics and the wirefeed motor. It may be located just behind the contactor. I think the primary may have shorted ( or possibly the fan has shorted ).
With the machine powered off and unplugged, locate the mains input wires to the transformer, and the tapping wires that go off to the fan. Mark them and make a note of their locations. Then disconnect one input wire, and one fan wire. Using a multimeter on the "2K" Ohms range, check the resistance of the transformer primary, and across the two wires going to the fan. I expect the reading to be from 100 to 300 Ohms. If it is zero, or very low, then that's the problem.