to buy a dinosaur Lincoln tig 300/300 as back up for new 3 in 1 chinese welder?

[Shield Arc]

All I can say is that is darn impressive! (welder/Weldor):thumbsup:

Thank you!
It does pretty good with 7018 also. Even though this welder was built years before 7018 came out.:laughing:

 

[yomax4]

Awesome deal. I doubt that the transformer would be bad. Everything else can be sourced at a reasonable price. Now you can sell it and buy an inverter.. just kidding.

 

[sd455dan]

Unloaded the welder and pulled a couple covers off, blew out the insides.

Hooked up a temp 240vac cable to the spare 40 amp breaker- all that was available for a test (will replace with a 70 amp) and set the outputs to minimum.
Pushed the start button and the fan came on and the tig / arc relay worked.

So I shut her back down, stole the leads off my new 3 in one inverter welder/plasma cutter

stuck some 7018 in the holder set the power to medium and the electrode to dc + grabbed some steel and fired the welder back up and sure enough it will weld at dce+ also tried some 6013 in ac and dc- and at some different power levels


arc mode seems ok :cool2:


I guess the next step is to get an appropriate power cord and breaker installed and source some reasonably priced welding leads.

It is going to take a little time for me to get the tig hooked up and test it to see if it works also.
The tumble out of the truck snapped off the timer dial for the argon...

But even if the tig doesn't work I am still very pleased to have the extra amperage and the ability to weld ac and i am also hoping to try some 6010 for the first time.
Will try to update with new developments.

 

[cqaigy2]

Sweet! Now clean a spot out to set her up. :thumbsup:

 

[sd455dan]

update: Got the tig torch connected and couldn't get any arc even scratch start.
Then after reading the Lincoln manual from their online support center ( Thanks Lincoln) it became obvious that the older tigs supplied power directly from the arc stud.

Once that was remedied i was able to get main arc and the hf board was producing hf arc at the points but very weak arc at the torch head.
I couldn't read the hf board schematic that was at one time varnished over on the welders side panel so sent an email requesting a digital copy and by the next morning it was waiting for me. Thanks again Lincoln.

After some troubleshooting it appears that one of the two small rf chokes wired in series with the hf transformer output has burned open and the high voltage was just trying to jump across it At least the hf transformer is ok.
Checked the parts center and nothing seems to be available.
After doing a little searching on ebay found a similar 2.5 mh 24 ohm/.17 amp (matches the good ones resistance and 33 wire gauge ) rf choke and got a set of four ordered.

still need to repair the after flow control knob and thinking of adapting the output studs to a Dinse set up so that cables can be transferred between welders.


hoping (still) to have a welder capable of tig welding Aluminum...

Also finding a S-P-A-C-E might also be one of the more challenging aspects , but really want to get the main features functional first


Thanks everyone for the encouraging words

 

[dntfxr]

Once you get it all sorted I'm thinking your Chinese 3in1 will be the backup.:thumbsup:

 

[Big Barn]

"One can never have enough welding machines"

Not certain who said that...prolly some broke guy.

 

[Shield Arc]

I think it's ridiculous to have more than one welder. There should be a law against it!

 

[Big Barn]

I think it's ridiculous to have more than one welder. There should be a law against it!

Happy New Year, Carl. Let me know if you need a $$loan$$. .

Terry

 

[Shield Arc]

Happy New Year to you too Terry!:thumbsup: