BenB
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| posted on 8/1/09 at 12:36 PM |
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MIG welder result
Thanks for everyone suggesting replacing the earth cable on my MIG  (I think it was Mr Whippy who done it first!!)...
Just come back from a little welding session after replacing the earth clamp. I couldn't replace the cable because it's attached direct to
the transformer secondary  So I just attached a shiny new clamp onto the old cable and bingo!!
Much better welds, better penetration etc etc.
It's still a little bit marginal to begin with but once the workpiece heats up it's pretty good. Starting at the edges and moving inwards
helps as well.... Perhaps if I got a blowtorch on the pieces and got them good and hot first it would take better.....
So it looks like by notching the material to be welded and moving from the edge to the middle I can weld 1.5mm thick material with a Clarke90 when
using 100% CO2!! Wow 
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Mr Whippy
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| posted on 8/1/09 at 12:40 PM |
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Fame is when your old car is plastered all over the internet
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jacko
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| posted on 8/1/09 at 04:38 PM |
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The earth clamp is very important you must have a clean connection to the work piece if not it WILL damage the transformer
Jacko
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blakep82
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| posted on 8/1/09 at 06:21 PM |
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where would i get a new clamp?
mine is very thin metal, and is made jaggy at the end, as a result its like 4 pins touching the metal, and it keeps welding itself to the peice
i'm welding...
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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BenB
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| posted on 8/1/09 at 06:38 PM |
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I got mine from Ebay.....
linky
with some re-usable wire clamps
linky
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Mark Allanson
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| posted on 8/1/09 at 07:15 PM |
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Get one of those cheap molegrips from the market and weld a M8 bolt to it - best connection you can get
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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Peteff
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| posted on 9/1/09 at 11:07 AM |
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Or just beat a piece of copper pipe round the end of your wire and mole grip or G clamp that to your work.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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