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Electrical Expert Help Please

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  • fun4now
    replied
    plasma on tubing

    i have used my plasma on 1 1/2" tubing to make fish mouths.just trace the cut you want and then cut it. they make some real cool tool's to alow you to get the exact angel and shape to fit up at any angel looks like a bunch of welding rod's inside a ring. just trace the cut you want and then cut it.

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  • burninbriar
    replied
    Originally posted by TheRealSpinner
    I must say that I have not had a lot of experience in cutting, but the first thing I bought for cutting (after a crappy all in one rotozip-waste of money, don't know what I was thinking) was an O/A setup. I was renting for a while because I didn't have the money to buy, then realized how much money I was wasting and bought the bottles, anyway, I just have a medium sized (nothing fance) cutting torch with welding tips also. The shop I bought it from said that the tip that came with it would cut through 5" thick material. Right now, the only thing I try to cut is 16 or 18 ga. sheetmetal or 1/4" round stock. It's great for roundsock (with finishing required), but sucks for sheetmetal that thin, but there are ways around that.

    I would look into buying a O/A set-up. Couldn't hurt (except the pocket book).
    I have usd OA setups extensively and corect tip size means everything.On larger torch bodies you need to use the smalleat tip and resort to methods like hakj mentioned becous tips for these bodies usualy only go down to 1/8" capcity.

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  • Paul Seaman
    replied
    I have used the drill tubing notcher with just a 1/2" drill motor and the notcher mounted to a large piece of plywood. Doing it this way make sure the hole saw is sharp and brace yourself if it hangs up it'll take you for a ride.

    I don't think the shape will be easy to achieve with the plasma.

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  • jolane
    replied
    Migmaniac,
    I will eng up swapping breakers and the wall outlet to 30A. That is the best for now.
    As for the O/A...truth be told, I have an O/A setup I can use at work if I need to, and my father also has a full setup if I need it. I also have everything but the bottles and cart. I may stillpick up a set of bottles and just store them outside, locked up somehow...
    The plasma is not intended to just be for fun, although it will be fun also, but in general for the purposes of automotive work and fabrication. It would have been great to have one for cutting out the floorpans in my car (I used a combination of sheet metal shears, air hammer and grinder with cutoff wheels). I have also built new motor mounts from 16 gauge, modified the crossmember heavily for these mounts, cutout and replaced the rear quarter panel, will be replacing the rear valance, added subframe connectors (required a lot of cutting, turning a rect tube into a channel), will be building a fuel cell, and on... Once this car is complete, I will start on my suburban, making bumpers, skid plates, EFI manifold, etc... I also have a trailer on the list of things to build at some point. So to be honest, while I can get by with the grinder, and sheet metal shears, and nibbler, and cutoff tools, etc... this is starting to not be so much fun and more laborious just cutting the metal out. I have a lot of metal to cut to reinforce the shell still as well (18 guage sheet), and getting clean inside cuts is tough. Getting two or even four pieces to match is VERY hard right now. With a plasma, stack and cut...
    Now that I have bored everyone, maybe this explains why I am resistant to relying on an O/A setup to get me through. Once the aluminum needs to be cut, I will again be wishing I had a plasma...
    Joshua

    BTW, does anyone know how well a tube could be fishmouthed with a plasma cutter? I have a tubing notcher thingy that goes in a drill press, but my drill press is not big enough to use it. Anyone think that would work well?

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  • Guest's Avatar
    Guest replied
    Just swap the breakers, you'll be fine.Especially if the run is only 2 ft

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  • hankj
    replied
    Hey there, Spinner, all I had to cut with in the beginning was O/A. For 16ga. I used a 000-3-101 Victor tip, got the cut started, and lifted the cutting head as high as I could away from the steel and still hold the cut. Took some practice, but you can cut 16ga real nice like that!

    Hank

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  • TheRealSpinner
    replied
    I must say that I have not had a lot of experience in cutting, but the first thing I bought for cutting (after a crappy all in one rotozip-waste of money, don't know what I was thinking) was an O/A setup. I was renting for a while because I didn't have the money to buy, then realized how much money I was wasting and bought the bottles, anyway, I just have a medium sized (nothing fance) cutting torch with welding tips also. The shop I bought it from said that the tip that came with it would cut through 5" thick material. Right now, the only thing I try to cut is 16 or 18 ga. sheetmetal or 1/4" round stock. It's great for roundsock (with finishing required), but sucks for sheetmetal that thin, but there are ways around that.

    I would look into buying a O/A set-up. Couldn't hurt (except the pocket book).

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  • hankj
    replied
    Hey, Bud, they won't go bad on ya! Just do your thing, and keep on grinnin'.

    Hank

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  • jolane
    replied
    Yep Hank, that is an option also. Actually I have a nice set with rosebud and the such, brand new in the box...but am hesitating with the bottles. They take up so much room (I already have a K size C25 and Argon). They are also rather expensive... I would like the heat though for bending.
    Actually though, I expect that my cutting will consist of a good mix of sheetmetal (automotive related, building a resto rod right now) up to 3/8" type stuff. I want the ability to cut thicker though, and have a need to cut aluminum (fuel tank, intake manifold, etc). So, while the O/A would work for some things, I don't think it is the best thing right now. I only bought the set because it seemed like a good deal. It will now sit there for a year or two before it gets used...
    Joshua

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  • fun4now
    replied
    hankj

    hummmm fire, look at all the prity collors he he he flame good

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  • hankj
    replied
    Ther is another resort: The poor mans plasma by Victor Equipment. Zero current draw!

    Hank

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  • fun4now
    replied
    Plasma Oh Boy He He He !!!!

    PLASMA is the BOMB BABBY!!!! you will be looking for excuses to cut stuff up when ya get it. besides being great tool's they are great fun too.

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  • jolane
    replied
    Thank You Hank! After looking around at breaker data, as much as I can find, it looks like they usually will withstand ~5-600% the rated current for ~10 sec, rough figures. With that in mind, I don't think that the current draw of the compressor will be a circuit breaker "popping" issue. The only concern now is voltage drop when it kicks on. It does dim the house lights a little. I guess I can try to measure it though.
    This is starting to get exciting now...I could really use a Plasma..I am getting tired of cutting with a 4 1/2" grinder...
    Thanks Again Everyone!
    Joshua

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  • hankj
    replied
    Jolane,

    Look at the nameplate data on the compressor motor. Whatever the current is listed at is all the braker it will ever need. I vote for the 20 - 30 amp upgrade and cut away!

    Hank

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  • jolane
    replied
    Thanks Everyone for the help,
    I tried to find out more about breakers, and how they trip, but couldn't find anything useful. If I had a general current versus time load for a breaker, I guess I should be able to figure out a given current load at a point in time.
    The 20A circuit I have is immediately below the panel, which is in the garage already. No more than 2 feet away...and I believe I used 10-2 Romex for the circuit already (have to check to make sure).
    As for upgrading the panel, this is by far the ideal situation, but unfortunately I don;t think it will add any value to my house. My neighborhood is the type where people pay others to do things...not very hands on. Not the right environment to make a lot of noise. Also, I hope to not be in the ssame house in a year or two... I am currently looking for land/a shop/etc...but for now I have what I have. I will upgrade though if required...just don't want to for the reasons above.
    Andy, so do you think that the Spectrum 625 will run full tilt on a 30A breaker? The manual lists 35A time delay. This is going to be used in a home shop environment, NOT a production shop of any kind. It may see 1-2 hours a weekend at peak usage time in the current garage (running out of space to work any longer).
    Thanks again for all the input!
    Joshua

    Leave a comment:

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