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  • Rotating welding device

    Anyone have plains or has constructed a rotating welding table for welding round tubing. I have seen the fixtures advertised but they are very expensive. I have electric motors but getting the speed to gear down in my problem.
    Miller Dialarc HF
    Millermatic 180
    Warner Swasey #3
    Burr King Grinders

  • #2
    Well gearhead you need a gearbox to slow it down. Check ebay and do a google search they are cheap on the web. I got a NIB 60 to 1 for 100 bucks its 600 local. I have a home made positioner that i use the base for a few other items i just switch the tops. It works great...Bob
    Bob Wright

    Spool Gun conversion. How To Do It. Below.
    http://www.millerwelds.com/resources...php?albumid=48

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    • #3
      So 60 to 1 is the gear ratio I should be looking for. I'll do the searching. thanks
      Miller Dialarc HF
      Millermatic 180
      Warner Swasey #3
      Burr King Grinders

      Comment


      • #4
        Here is my gearbox setup for bending metal, the gearbox fits many machines i have i just remove 3 bolts and the whole unit removes to bolt on another machine. The pic with the top removed is what you want. Add another top, and a shaft with a plwyood top and you are ready to go. You can even cover the plywood with sheetmetal to keep it from burning. Also 60-1 is the slowest i found reasonable...Bob
        http://pg.photos.yahoo.com/ph/aameta.../ph//my_photos
        Bob Wright

        Spool Gun conversion. How To Do It. Below.
        http://www.millerwelds.com/resources...php?albumid=48

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        • #5
          You'll probably want to consider a variable speed motor so you can match your welding speed. Most of these units have a foot pedal or dial for this.

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          • #6
            Why couldn't I just use an electrical reastat (sp) switch on the motor to change the speed.
            Miller Dialarc HF
            Millermatic 180
            Warner Swasey #3
            Burr King Grinders

            Comment


            • #7
              Why couldn't I just use an electrical reastat (sp) switch on the motor to change the speed.


              You can if your motor is wired for it. I don't know how to tell, but someone here probably does.

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              • #8
                i cant get your link for the pic to work. did i read in hear not to long ago about using a tred mill motor/

                Jason

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                • #9
                  welding turntable

                  Hello gearhead,

                  Here are some photos of a turntable I made. It uses a gear reducer I had sitting for 20 some years. Ratio is 1725 to 1 so I had to do some experimenting.

                  I first put a 3" diameter pipe coupling on an old record player and had a friend turn it slowly at rough tig welding speed while I timed it with a stopwatch.

                  We came up with 1/2 to 3 RPM as a range for the turntable speed for my needs. Your needs (and mileage) may vary.

                  Then I ran the numbers with my existing gear reducer and found a 12 volt DC motor on ebay.

                  It works perfectly as far as speed range for the turntable as I can use 12 to 24 volts DC to run it.

                  The nice thing is that by swapping the leads (it has only 2), the motor will also reverse rotation. This is a nice plus.

                  I got the motor couplings from Reid Tool (www.reidtool.com) and the 3 jaw chuck from ebay.

                  I found the motor speed control in the internet and SSC controls (www.ssccontrols.com) has a foot switch and resistor which works for my set-up very similar to a tig foot control. SSC Controls will
                  change the resistor value to match your needs. They also make TIG foot controls.

                  Welded a plate to the motor coupling in case I had odd shaped pieces to weld.

                  Most welding is done with the 3 jaw chuck.

                  Hard part is using both feet and not mixing up who does what.

                  Hope the photos help.
                  Attached Files
                  Thermal Arc GTSW400, Airco Heliwelder II, Miller Dynasty 350, Hypertherm 1000, oxy-fuel setup, metal cutting bandsaw, air compressor, drill press, etc.:

                  Call me the "Clouseau" of welding !

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                  • #10
                    I made this one for me and it works good. It's a dc motor with a 300 to 1 gear box. The max rpm is 6 and it's a little fast for big diameters. The motor and gear box are ebay stuff.

                    As you can see I use it for other things. I had to roll 1/4 x 1 hast x. I did 1 by hand and figured there was a better way. There was!

                    I had to build something bigger than my little Atlas before I killed it.
                    Attached Files
                    Mike
                    MD Welding & Fabricating L.L.C.
                    mdwelding@sbcglobal.net

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                    • #11
                      I forgot to mention I have a speed controller hooked up also.
                      Mike
                      MD Welding & Fabricating L.L.C.
                      mdwelding@sbcglobal.net

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                      • #12
                        Originally posted by gearhead View Post
                        Why couldn't I just use an electrical reastat (sp) switch on the motor to change the speed.
                        Assuming you are talking about an AC motor...

                        You can't use a rheostat or autotransformer to slow the motor down because you are only changing the voltage. The frequency determines idle speed and the voltage applied to the motor affects only the torque when operating against the load. If you decrease input voltage enough to slow the motor down, you'll burn it up.

                        Now a DC motor is a whole 'nother animal.

                        80% of failures are from 20% of causes
                        Never compromise your principles today in the name of furthering them in the future.
                        "All I ever wanted was an honest week's pay for an honest day's work." -Sgt. Bilko
                        "We are generally better persuaded by reasons we discover ourselves than by those given to us by others." -Pascal
                        "Since we cannot know all that there is to be known about anything, we ought to know a little about everything." -Pascal

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