DynoDave
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Motown Mopar-Wizard
Posts: 11,169
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Post by DynoDave on Jul 30, 2009 15:05:09 GMT -5
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brock
Major Website Supporter
MEGA KILOVOLT-MASTER
Posts: 3,459
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Post by brock on Jul 30, 2009 23:02:58 GMT -5
Dyno, you need to put it back on them to make it right. I've never used my HVLP paint sprayer but found out much too late that it is ruined. I've lost every torque wrench I've loaned out - got them back only to find they are broken  So now, my Friends still get my tools: cept I'm attached. We needed a good visit anyhow  More direct answer to your question is that you should be OK with just replacing the diodes. (I recommend using stronger diodes) It was something on the load side that caused the failure. Let me guess: An inexperienced user  |
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DynoDave
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Motown Mopar-Wizard
Posts: 11,169
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Post by DynoDave on Jul 31, 2009 7:06:41 GMT -5
Brock,
Thanks for the reply! #2Thumbs#
I hear what you're saying, but this guy is top shelf. He already did more work on it than I expected.
The machine is close to 20 years old. I haven't used it myself since around 2002. It sat for many years, was loaned to another friend who did some patch work and hung a new 1/4 on a '70 El Camino. It worked OK for him, then came back here and sat for years again. So who knows what happened or when.
Now, as for the amateur user...yes, it was the first time the guy had tried to use a MIG. But heck, I have no training on them either, sort of self taught. I guess I didn't think the controls would allow you to draw excess current and damage the unit. Do you have any sort of particular mis-use in mind that might cause such a thing? That might help me avoid repeat damage in the future.
Also, do you have any favorite electronics shops that you deal with that might have the diodes? Those I/R numbers don't appear to be any good today (not on the I/R site). The guy who looked it over did a fair amount of research on-line to try and find them, by didn't come up with anything.
FYI....if I can fix this unit cheap, I'd like to do it. But if not, it gives me a legit reason to upgrade to a nice 220V Hobart unit at Tractor Supply Co. ;D
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brock
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MEGA KILOVOLT-MASTER
Posts: 3,459
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Post by brock on Aug 1, 2009 10:19:45 GMT -5
www.national.com/xref/xref.cgi?partno=Try that. I'm not "up" on welders. I figure they have some sort of current limiter to protect those diodes - or I would've blown out several myself. Diodes do fail though over time. Let me know if you find a replacement or just let me know the info on them & I'll see if I can find them.
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DynoDave
CO-ADMINISTRATOR
Motown Mopar-Wizard
Posts: 11,169
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Post by DynoDave on Aug 1, 2009 19:30:19 GMT -5
Thanks Brock. I'll check into that after this weekend.
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