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  1. #1
    Join Date
    Oct 2006
    Posts
    4

    Vibrating Table design help needed

    Hello....I am making a vibrating table to polish marble.

    Would appreciate input on the mechanism to make it vibrate.

    So far.....steel pan....4' x 2' mounted on 4 heavy duty rubber isolation mounts.

    Idea 1....4 foot long HORIZOTAL shaft in 4 pillow blocks...and 2 cam lobes running along the side of the pan....pushing it sideways.

    Idea 2 VERTICAL shaft underneath with a cam lobe on the end....spinning around and hitting a metal bar, welded to the bottom of the pan...pushing it sideways

    Idea 3 Vertical shaft underneath with a cam lob spinning around inside a ring....welded to the bottom of the pan....pushing out in 360 degrees....

    Idea 4 should I do something with an eccentric? if so what?

    Would appreciate any input...

    Thanks, Leland

  2. #2
    Hi Leland,

    I've done this on a smaller scale. I needed a cheap, but larger than
    normal vibratory bowl for polishing jewelry parts. I used a 18" pan for
    changing your car oil and an $11.99 walmart fan motor.

    The motor was mounted in a wooden ring with 4 springs around it.
    Different thicknesses and lengths of springs were tried. the bowl
    was attached to the top of the springs on a second wood ring...
    cut out with a simple circle cutting router attachment.

    I just bolted a piece of brass to the motor shaft to make it wobble
    like an SOB....A few experiments with the springs(they're pretty heavy
    duty...from ACE hardware) and it worked like an industrial charm.

    I still have it. I ran it for DAYS at a time for about 12 years. I was
    always prepared to upgrade the motor to a regular 1/2 horse or so,
    because I was so reliant on the thing. But it just kept working.

    I'll have to get you some pictures. It's a sorry looking thing, but it's
    unstoppable. That on an adjusted scale would work great. I wanted
    to do the same thing you're talking about to polish flat surfaces, but
    I just haven't gotten to it yet. CNC got in the way

    John

  3. #3
    Join Date
    Mar 2004
    Posts
    1661
    Check this one out, a simple but very nice solution:
    http://www.cnczone.com/forums/showpo...postcount=2079

    Regards,
    Sven

  4. #4
    Join Date
    Nov 2006
    Posts
    251
    Idea 3 sounds good with the 4 rubber mounts ,you may like to use a bearing on the end of that vertical cam to give it some life and reduce some friction.

  5. #5
    Join Date
    Sep 2007
    Posts
    10
    I built a 48" x 96" vibrating table for casting concrete 10 years ago and still use it. Check out Vibco for electric or pnuematic vibrators, and you'll definitely want to use air bags to isolate the table from the base, unless you want the whole house shaking loose. I got mine from Goodyear. If you want more details let me know.

    Burt

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