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Type: Posts; User: tadream

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  1. Replies
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    Schematic needed Airco Heliwelder V

    I pulled an interface board from a customer's machine to replace a shorted transistor. Having no manual for this unit, I made some notes as to where the individual wires hooked up to the board on all...
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    I'll try to locate that book this week, but no...

    I'll try to locate that book this week, but no guarantee I'll find it. I'm sure you probably got the right things on that board, but the thyrister you mentioned is actually a Triac, not just an SCR,...
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    Still working on this? I've had a bad experience...

    Still working on this? I've had a bad experience with repairing one of these several years ago (although I finally got it). There's also one of these machines sitting in my parents' garage, and the...
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    Jack, read your reply yesterday, but didn't have...

    Jack, read your reply yesterday, but didn't have time to respond (been busy - 2 jobs). Okay, the donuts sound like current transformers which would do the same job as an actual shunt. Not what I...
  5. For your circumstance, I'd recommend making a...

    For your circumstance, I'd recommend making a "breakout" adapter with a couple of molex plugs from the electronics store. You could install it inside the little access door, and then you don't have...
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    I guess it's obvious that I've not checked in on...

    I guess it's obvious that I've not checked in on the board for a while, seeing the date the original message was posted, so I hope this isn't too late. That machine is WAY out of support these days,...
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    The only thing you could really use that would...

    The only thing you could really use that would work anywhere near satisfactorily would be a voltage sensing feeder. (such as Miller 12VS, or Lincoln LN-25). These are both standard feeders, not spool...
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    Yep. Every one that I've ever seen is just that....

    Yep. Every one that I've ever seen is just that. Most of them, however, are set up with the controls in series, so that they act in a master/slave configuration. The panel-mounted one still sets the...
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    I've seen it do crazy things, like causing a...

    I've seen it do crazy things, like causing a phone to pick up on speaker phone and dial a random number. One customer even had a fax machine line that kept dialing 911. Yeah, the cops were thrilled...
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    It's gonna depend on how the unit's output is...

    It's gonna depend on how the unit's output is controlled. How do you adjust the amperage? If is uses a rheostat, it's doable, but if it's got some kind of crank handle, then you're SOL.
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    Normally I'd recommend against it, but for what...

    Normally I'd recommend against it, but for what you're doing, it would probably be fine. Essentially, it's just a stick machine with a "dry rig" tig torch attached. The only advantage you'd have over...
  12. Thread: spot welding

    by tadream
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    Never personally seen anybody use 'em for AL, but...

    Never personally seen anybody use 'em for AL, but see no reason why it wouldn't work. You'll have to play with the timers a bit to see what works best.
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    All of the spark gap oscillator HF units are...

    All of the spark gap oscillator HF units are essentially the same. The capacitors, points, etc. are, for the most part, interchangeable. The vast majority of them use a xfmr with a 115v input. Your...
  14. Thread: Tig Process ??

    by tadream
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    Wow! I've heard of something like that before,...

    Wow! I've heard of something like that before, but in 21 years of repairing welders for a living, I've never actually seen one. That's quite a find, and I'd be interested in hearing where you got it,...
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    You're going to want HF. Lift arc is okay for...

    You're going to want HF. Lift arc is okay for steel, but it's just an arc starter. Aluminum use AC and continuous HF to maintain the arc. You can weld aluminum with AC and no HF over about 80 to 100...
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    That was something that I wondered about myself....

    That was something that I wondered about myself. I don't know much about microwave transformers, but I was wondering what kind of a volt-amp curve they have. You need a fairly high open-circuit...
  17. Thread: Welder

    by tadream
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    Wow, that IS a good deal. I didn't realize anyone...

    Wow, that IS a good deal. I didn't realize anyone had the price of those machines down that far. I would recommend that to anyone as well. Besides having the all the output that most home users would...
  18. BTW, here's a little-known factoid about Lincoln...

    BTW, here's a little-known factoid about Lincoln part numbers: They start with letters. They have little consequence now, but for a long time they referred to size:
    L = Large
    S = Small
    T = Tiny
    M...
  19. Sorry so brief last night, was running late for...

    Sorry so brief last night, was running late for work. I don't know of any place online, but any Lincoln dealer or Field Service Shop can order it for you. The price should be pretty much the same...
  20. Correct part number.

    Correct part number.
  21. Thread: Tig Process ??

    by tadream
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    Possible, yes, practical, no. Not sure what model...

    Possible, yes, practical, no. Not sure what model you have. Probably a Miller Thunderbolt or similar? The core is indeed very difficult to move while current is being drawn, so you'd have to remove...
  22. Thread: Tig Process ??

    by tadream
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    Long answer, short: The old Miller IS one of the...

    Long answer, short: The old Miller IS one of the sturdiest, most dependable machines ever built. It is also cheaper to repair, as it has no circuit boards whatsoever. The Lincoln, and almost all...
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    I have a customer that has been using Lincoln...

    I have a customer that has been using Lincoln SP-100's for years to weld AL with decent results. Amazingly, they have found that the regular wound steel liners work better than the nylon ones, and...
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    Amen to that. I welded with them one time several...

    Amen to that. I welded with them one time several years ago, just because I'd never seen them either. Took several attempts to even lay a bead, rather than burn through. You gotta really move with...
  25. Thread: Tig Process ??

    by tadream
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    Yes, there are several different methods of...

    Yes, there are several different methods of current control. Unfortunately, none of them are easily, or readily adaptable to existing machines. I, however, appreciate the desire/need to DIY more than...
  26. Thread: Tig Process ??

    by tadream
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    I'll give you my personal recommendation about...

    I'll give you my personal recommendation about what I would do if I had your list of equipment: The Linde, Hobart and DC600 will all do MIG. The DC600 and the Idealarc with both do stick. The...
  27. Thread: Tig Process ??

    by tadream
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    The HF box is a good suggestion if you can find a...

    The HF box is a good suggestion if you can find a used one cheap. (there's one on ebay for $150 right now). However, a new one is nearly $1000. Foot pedals are around $200. An air cooled torch near...
  28. Thread: Tig Process ??

    by tadream
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    A DC stick machine can be easily converted to TIG...

    A DC stick machine can be easily converted to TIG steel and stainless. HF is nice, but you can add a torch that has a manual gas valve and scratch start, and that's all you need. You need AC and HF...
  29. Thread: Tip, low life

    by tadream
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    after a separator gets the bulk of the moisture,...

    after a separator gets the bulk of the moisture, use this http://weilerwelding.com/shopsite_sc/store/html/motorguard.html
    right at the machine. It's the shiznit!
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    Find a local welding supply with a Profax catalog...

    Find a local welding supply with a Profax catalog and match it up in there. I think the original brand is Binzel, but not 100% sure. A profax dealer can get them in their version which is good...
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