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Welding Forum web site
The welding forum has proved to be very useful to me , see link.
http://www.mig-welding.co.uk/forum/index.php My cheap SIP 170 mig welder has always been a problem, it suffers from a inconsistent wire feed. After reading all of the posts on the Sip sub-forum I can see why ! Mike
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1940 cab 11 C8 1940 Morris-Commercial PU 1941 Morris-Commercial CS8 1940 Chev. 15cwt GS Van ( Aust.) 1942-45 Jeep salad |
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Welding forum
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#3
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Thanks for the Welding Forums
Thanks for the two Welding Forums, very timely I'm hosting a welding seminar in my shop tomorrow, so I'll share the information source with those attending.
We're going to have 7 different welding machines of different types for a hands on welding experience for our local MV Club members. I've been doing this for the last 4 or 5 years. In the past we've just used my welding units, but tomorrow we have 4 different mig units to have a comparison welding demonstration. Argon-C02, straight C02, top end flux-wire, and low price flux-wire, should be interesting to see how they do on different thickness steel. Cheers Phil
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Phil Waterman `41 C60L Pattern 12 `42 C60S Radio Pattern 13 `45 HUP http://canadianmilitarypattern.com/ New e-mail Philip@canadianmilitarypattern.com |
#4
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Snap
I love my little SIP Mig but I agree about the wire feed. I've been having a hard time with the repairs to my Dodge panel van, spending more time persuading the Mig to work than welding with it.
I was looking for a Lincoln 180 to replace it, but the latest retail price is ££££ Gordon
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Gordon, in Scotland |
#5
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Quote:
The other little trick is to use two old cloths pegs and clip a wad of wire wool onto the wire and a small wad of rag after it just before the feed rollers, it cleans the wire up a treat. Also in colder wetter climes its a good idea to take the roll off and keep it in the airing cupboard in between jobs. Pete |
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Rust on the wire
Peter- You are spot on with one of the major problems with wire feed that are not used all the time, rust on the wire.
The wire wipe idea is a real good one. The rust on the wire will ruin the wire tube as it accelerates wear cause uneven or jumpy feed, wears the tips etc. I remove my wire spools when not welding and store them in a good tight container with desiccant bags. Learn this hard way when I had to throw out a large spool of wire that had gotten rusty. The other little kooky thing is if you use your mig to weld aluminum you have to have a separate wire liner (generally plastic I think) to use with the aluminum wire or else you get cross contamination and a lot of sputter and nasty looking welds. Thanks for the reminder as I will remember now to include that in tomorrows class. Cheers Phil
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Phil Waterman `41 C60L Pattern 12 `42 C60S Radio Pattern 13 `45 HUP http://canadianmilitarypattern.com/ New e-mail Philip@canadianmilitarypattern.com |
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Sip
Quote:
If you read through the SIP sub-forum on that first web site, you will see many others had have similar problems. Some guys have come up with clever mods that result in a nice welder . 1. You can brace the feed rollers with a simple piece of metal, this simple mod reduces the rollers tendency to flex under load . The SIP wire feed mechanism is really a poor bit of design. http://www.mig-welding.co.uk/sip-wirefeed.htm 2.The metal wire liner helps a lot apparently , they normally come standard with a plastic liner. For Aussies , the BOB the WELDER web site sells them. http://www.bobthewelder.com.au/home....ction=0&page=2, 3.You can do the simple electronic mods. A capacitor across the wire feed motor helps to steady the voltage and smooth out the drive. And, there is a electronic switch mod. as well . Mike
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1940 cab 11 C8 1940 Morris-Commercial PU 1941 Morris-Commercial CS8 1940 Chev. 15cwt GS Van ( Aust.) 1942-45 Jeep salad Last edited by Mike Kelly; 23-04-11 at 03:31. |
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Mods
I like the little bracket across the rollers, and will go for a metal liner plus new swan neck spring, shield, and tip when I can get them.
The one time it always works is when I set if flat out, when it will happily weld 1/4" till it overheats and cuts out. I think I killed the first SIP on Dusty DUKW, but this one has done everything since then, but with increasingly erratic wire feed since it has never had a new liner. I'm working on the rear doors of the WD21 van at the minute, where the repairs are actually quite simple if I could just get the MIG to run consistently. Long tem the people on the fora always seem to head towards a Portamig so that might be worth a look too. Gordon
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Gordon, in Scotland |
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