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Post by beaualex on Feb 12, 2011 21:09:46 GMT -5
WOW! That is really cold! I once spent the night in December in Questa, NM in a fifth-wheel trailer I was delivering and I thought I was going to freeze to death---no heat. I thought for sure Edgewood was closer to the Colorado border than it is. Hopefully, the really cold weather is behind us. We only got down to 18 degrees, but for my money, that is cold enough. Beau
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GuglioLS
Administrator
Jinma354 LE
Posts: 1,276
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Post by GuglioLS on Feb 13, 2011 22:40:20 GMT -5
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Post by beaualex on Feb 16, 2011 14:41:19 GMT -5
WOW! Absolutely super! Thanks Larry, I really appreciate the time you spent making these photos. Thanks for the ABS spacer shot. I thought there should be a shaft spacer, but one did not come with my rig. I have also built a spool spacer that holds the wire spool more centered on the drive wheels. Probably not required, but what the heck. Thanks again for all of your help.
Beau
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Post by beaualex on Apr 17, 2011 17:04:01 GMT -5
Hi Larry, I have all of the parts for the diode replacement. Boy, you were fortunate to have the copper mounting bar, because the price of copper has gone through the roof. I did not want to tear down the welder for the diode mod until I have finished my gate project, just in case I ran into a problem. Question: have you had any problems with porosity? I am using argon/co2 mix and it was doing fine. Now there is unacceptable porosity. The gas is getting to the gun nozzle, but it appears air may be entering the line somewhere. I have checked all of the gas line connections and they all appear okay. Any ideas? I'll just have to stick weld the rest of the project until I get this figured out. Thanks for any thoughts you may have. Beau
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GuglioLS
Administrator
Jinma354 LE
Posts: 1,276
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Post by GuglioLS on Apr 18, 2011 10:38:38 GMT -5
Beau,
The gas mixture I use is most likely the same (75% Argon 25% CO2). The only time I get severe porosity or lots of tiny air bubbles in the welds is when the diodes start breaking down, almost always after exceeding the duty cycle times for the set amperage. After installing those full wave bridges with heat sinks that does not happens any more. It welds as smooth as silk even after exceeding the duty cycle. I'm certain upgrading the diodes has extended the duty cycle, by how much I don't know, but I have yet to smoke the diodes or overheat the transformers.
When you get the porosity does the weld crackle sound different? Mine sure did and I could tell right away when the weld quality was starting to crap out. Perform the diode upgrade and you should be all set.
Larry
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Post by beaualex on Apr 18, 2011 13:26:03 GMT -5
Larry, Thanks for the info and quick reply. I am getting the porosity right at the start of the weld. So, I am not running into a duty-cycle issue. I am also wondering if, perhaps, I have some crappy wire. Beau
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