Experience working on thermal dynamics, thermal arc, victor machines?

[Torchplasmasales]

Wait

[Torchplasmasales]

I've spent some years learning about and repairing these machines, most of which are now discontinued or rebranded since ESAB's consolidation. There where some seriously high performing welders in this lineup if you never got a chance to try one out, im sorry.

Since there is no online community...

[Torchplasmasales]

I apologize for the long delay in my response. I believe that I have messaged everyone who asked for more info. If I missed you then please PM me. Thanks.

[Torchplasmasales]

New info.

The fan is not running, although I read 120 V at the fan plug. When I plug the fan into external power it runs fine. When I plug it back into the board the voltage drops to 12VAC but I cannot see any current drawn by the fan. Weird.

[Torchplasmasales]

Thanks I will take a look at that today. I’m kind of at a dead end with this welder. Usually it’s obvious where the problems are but on this one everything I test is turning up good. I just have 0 voltage at the lugs. I’m starting to wonder if someone screwed around in it before I got it. It looks...

[Torchplasmasales]

check that you are firing on all cylinders,...

[Torchplasmasales]

Sorry, I'm not following you. This is the module I was talking about

https://www.amazon.com/Miller-201936...71801&hvpone=&...

[Torchplasmasales]

Hello,

Please forgive me if this is outside of the rules on this board.

I wanted to get the word out that I buy nearly any kind of modern-ish broken (mostly) welding machines and plasma cutters. I have been buying several victor brand and spectrum plasma cutters each month...

[Torchplasmasales]

I think I remember it being a 3rd party module and datasheets and/or pinouts are available on google. I don't have a bobcat anymore so I cant confirm that for you.

[Torchplasmasales]

yes....

[Torchplasmasales]

Check the idle cotroller PCB. Its mounted behind the panel.

[Torchplasmasales]

Thanks. I have a stack of oscilloscopes both analog and DSO models that I can use. Do you know at what location I can measure the AC the voltage from?

[Torchplasmasales]

Am I understanding correctly that the output diodes are configured as a rectifier? And if so should I be able to read an AC voltage feeding into the diodes? Does anyone know which nodes I should expect to find the AC voltage on?

[Torchplasmasales]

I know that this thread is old history but I wanted to circle back with what was going on in case it can help someone else later on.

In short the generator stator was shorted and it was beyond anything that could be repaired short of a stator replacement or rewind. Given that the engine...

[Torchplasmasales]

One detail that I left out from my original post is that when the selector switch is on VSense the voltmeter cycles between whatever value is selected on the V/A pot then .4, then .3 then repeats. Connecting the electrode to the work on this setting has no effect on the the voltmeter displayed val...