Jonny weld
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- Colchester
Hi. Just purchased a supermig 185. When switch on fan run but pressing the trigger no sign of motor no light nothing
Whan can I check?
Whan can I check?
- Thread starter Jonny weld
- Start date
Did you buy it as a non-runner?
Have you gone through the troubleshooting section in the user manual?
www.manualslib.com
Have you gone through the troubleshooting section in the user manual?
SEALEY SUPERMIG185 INSTRUCTIONS MANUAL Pdf Download
View and Download Sealey SuperMig185 instructions manual online. Power welder. SuperMig185 welding system pdf manual download. Also for: Supermig199, Supermig195.
www.manualslib.com
Jonny weld
Member
- Messages
- 85
- Location
- Colchester
Did you buy it as a non-runner?
Have you gone through the troubleshooting section in the user manual?
SEALEY SUPERMIG185 INSTRUCTIONS MANUAL Pdf Download
View and Download Sealey SuperMig185 instructions manual online. Power welder. SuperMig185 welding system pdf manual download. Also for: Supermig199, Supermig195.
Was told not used for a while. Trusted the chap. Too far to bring it back.
What should I check please?
Jonny weld
Member
- Messages
- 85
- Location
- Colchester
Fan is running, light off and nothing happen
Jonny weld
Member
- Messages
- 85
- Location
- Colchester
Not a single fuse inside?
If I'm reading the wiring diagram correctly, the light only comes on when the overtemperature cutout has operated. If the welder has been standing a while, there's a good chance that the trigger contacts have oxidised. Try giving the trigger a good few squeezes, to try and clean the contacts. Also, give the internal connectors a wiggle, in case any connections have gone intermittent. If that doesn't fix it, see if there's 24V AC being produced by the small transformer on the wire feed control board.
Jonny weld
Member
- Messages
- 85
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- Colchester
Can only see a motor, not wire feed. See photo
The motor that's visible in the photo is the wire feed motor. The control board for it is at the left of the photo, and is attached to the front panel behind the wire feed speed potentiometer and spot welding timer control. This board also controls the gas solenoid valve and contactor coil. The 24V transformer is the grey blocky component mounted on this board. Exercise caution when dealing with the welder, as there seem to be terminals carrying live mains that can easily be touched on the range selector switch, and maybe other places, too. Get a sparky in if you're the least bit unsure.
Jonny weld
Member
- Messages
- 85
- Location
- Colchester
Guess we talking about this component which takes from 240 to 12v
In the back there are two large spot weld and two small one
Which one should have the 12v?
In the back there are two large spot weld and two small one
Which one should have the 12v?
Jonny weld
Member
- Messages
- 85
- Location
- Colchester
Jonny weld
Member
- Messages
- 85
- Location
- Colchester
Transformer not working as getting the 240v but on the other side nothing coming out
Trying to find a pin for pin replacement transformer might end up being a real pain. Marini don't list the 2.8VA range, only 2.5VA or 2.3VA. You'll probably get away with using the 2.5VA part. eBay is a right pain, and the transformers there seem quite expensive.
You might be better off getting something like this, screwing it to the case, and running wires from the transformer to the circuit board, after removing the original transformer.
Or this might fit. The image shows a 9V rated transformer, but the main spec in the listing says 12V output:
You might be better off getting something like this, screwing it to the case, and running wires from the transformer to the circuit board, after removing the original transformer.
Or this might fit. The image shows a 9V rated transformer, but the main spec in the listing says 12V output:
Last edited:
Jonny weld
Member
- Messages
- 85
- Location
- Colchester
Thanks for looking into it.Trying to find a pin for pin replacement transformer might end up being a real pain. Marini don't list the 2.8VA range, only 2.5VA or 2.3VA. You'll probably get away with using the 2.5VA part. eBay is a right pain, and the transformers there seem quite expensive.
You might be better off getting something like this, screwing it to the case, and running wires from the transformer to the circuit board, after removing the original transformer.
Or this might fit. The image shows a 9V rated transformer, but the main spec in the listing says 12V output:
I may try to order the like for like transformer off amazon and see if 12v
Shall I test anything else before venturing for this replacement? Shall the machine still weld if welding wire is out of the gun? Or it will not work?
Thanks for the patience
It's possible to test to see if the wirefeed motor, gas solenoid, and contactor operate when the trigger is pressed, but it's not possible to weld without wire in the gun, since it is the welding wire that carries the current in a MIG machine, and the earth clamp completes the circuit.
Jonny weld
Member
- Messages
- 85
- Location
- Colchester
I put the wire in the gun and it's long enough to touch metal. If I complete the circuit with the earth clamp and touch the metal pressing the trigger it should weld for a second correct?
Just want make sure nothing else is broken
Thanks
Not if there is no 12V from the transformer, because the transformer supplies the current to power the contactor and the wire feed motor. However, the contactor may have a visible plastic "button", which can be manually pressed in to send power to the main transformer, provided the transformer and rectifier are both working. If you try this, the wire feed motor won't work, and because the wire isn't moving through the torch tip, it'll tend to become welded to the tip.
Jonny weld
Member
- Messages
- 85
- Location
- Colchester
Sounds like I'll will have to replace transformer first.
By experience is this something that's usully gives up and leave everything working?
Thanks
Yes, the small plastic-encapsulated PCB-mounted transformers seem to be quite fragile and they do fail quite often. Usually it is the primary that goes open-circuit, since it is running as long as the welder is powered on.
The small transformer only supplies the relay or contactor which enables the main welding transformer. That relay will also often power the gas valve, and the wirefeed motor is supplied with variable DC power from the output of the main welding transformer, via the speed control circuit on the PCB. So if the 12v transformer is not working, the relay will not operate, and nothing will work.
Rather than a contactor, this welder has a large-ish relay mounted on the PCB - the black plastic block below the small transformer.
The normally-open contacts of that relay are the two tags on the top. You could short or switch-on the two wires that have push-on tags. The welder should then burst into life....
The small transformer only supplies the relay or contactor which enables the main welding transformer. That relay will also often power the gas valve, and the wirefeed motor is supplied with variable DC power from the output of the main welding transformer, via the speed control circuit on the PCB. So if the 12v transformer is not working, the relay will not operate, and nothing will work.
Rather than a contactor, this welder has a large-ish relay mounted on the PCB - the black plastic block below the small transformer.
The normally-open contacts of that relay are the two tags on the top. You could short or switch-on the two wires that have push-on tags. The welder should then burst into life....
