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Thread: Plasma pattern torch, Special features, Circle_cutter, Plasma_saw

  1. #1
    Join Date
    Dec 2005
    Posts
    4,448

    Default Plasma pattern torch, Special features, Circle_cutter, Plasma_saw


    As it was.. a oxy acty barrel head tracer I made about 10-15 years ago.
    New pattern arm, made from paintline track

    Showing circle cutter being tested.


    Eccentric used to rotate arms in circle, adjustable with threaded rod, slider, 1" sq tube.


    Hydraulic rod from hyd cylinder, cut, center drilled, drilled and tapped for gear rack.
    Plasma cutter, cut 1" tube, turned 1/2" rod, cut at angle, tig welded to split tube, hose clamped to tube.
    RE NOTE, level everything with long level, the table, the mast the arm swivels, they should all be parallel to each other and the axis on the cutter center in vertical alignment of the tracer rod above, tracing rod should have a tip the width of the swarf cut out on the plasma cutter. Note the leveling feet on the mast head, the 8" circle leveled and welded to top of mast head, the pattern arm welded to circle.

    I posted more pictures over on metalmeet.com in the free tools section, will add dimensions over there. Using, Lotos cut50d plasma cutter, cheap consumables.

    Re: this project.. need to make a adapter for mustang transmission to chevy bellhousing.. cheaply.

    This project is made from "crap".. get up off your butt and make something in the machine shop. Building handles so you don't need wrenches to move parts. Putting a 41 chevy window crank on the circle cutter..

    Kinda tired tonight.. more tomorrow after Doc's wedding.. (biker wedding)
    Excuse me, I farted.

  2. #2
    Join Date
    Dec 2005
    Posts
    4,448

    Default






    Remember not to weld anything up solid till you have trial turned and checked for square in relation to each part.. or.. you'll be sorry.. (you know.. Like me, running 100mph)
    Excuse me, I farted.

  3. #3
    Join Date
    Jul 2007
    Location
    Europe-Asia border aka somewhere on the Saros
    Posts
    1,794

    Default

    Neat build.

    Shortly after you built yours, I built one out of scrapbinium with a power window motor, PWM controller, and magnetic tracer finger. I used the cheapest, nastiest ball bearings I've ever seen for the pivots. I think I have $100 in it, including the surplus motor, PWM kit, and bearings.

    I'm having issues with the magnetic tracer not following the pattern. Have you made a magnetic trcer for yours?
    Design to 0.0001", measure to 1/32", cut with an axe, grind to fit

  4. #4
    Join Date
    Dec 2005
    Posts
    4,448

    Default

    Yes.. chunked it.. Mostly, I make templates from cardboard. Hand trace them.

    I am working on a U-tracer.. put a clipboard on top, a U from the torch centerline to "over the clipboard", pointed scribe in holder, follow computer drawings printed 1:1

    I used to tattoo, following pattern lines is second nature.
    Excuse me, I farted.

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