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Thread: Off Center Eccentric Turning

  1. #1
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    Off Center Eccentric Turning

    Hi there:

    I'm not a turner, but I'm fascinated by the eccentric turning. What I don't understand is, if the piece is mounted off-center, and you hold the tool in the same place, doesn't it only touch the piece in one place? because the tool isn't touching the piece continuously?

    I'm wondering if some of the eccentric individuals here could explain it to me.....? I've tried to watch some videos on YouTube, but they're mostly in foreign languages (that I don't speak).

    thanks
    AKA Young Grasshopper Woodworker
    AKA The Rookie

  2. #2
    Join Date
    Dec 2007
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    Los Angeles, CA
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    Cynthia, I have only turned one offcenter item. Well, if you don't move the tool then the answer to your question is YES. But, in reality you have to keep moving the tool until you make contact and keep cutting. It is a strange feeling when you turn offcenter as you also see a ghost outline of the piece.
    Chinese Proverb: Man who eats many prunes gets good run for the money.

  3. #3
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    Cynthia in this thread http://familywoodworking.org/forums/...ad.php?t=22621 post 6 in one of the pics you can see where I marked the the handle in black. That is the only place the tool cuts when the work is off center. It starts out being a very short cut and as material is removed it get longer.
    It could be worse You could be on fire.
    Stupid hurts.

  4. #4
    Join Date
    May 2007
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    Orem, Utah
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    I hope this diagram doesn't confuse the issue by starting with an oval workpiece:


    I'm trying to show how, if you present the cutting tool at position A you will indeed get an intermittent cut. But by the time you work down to position B you're cutting all the time and forming a cylinder (the blue circle), at least at that particular point along the length of the workpiece.

  5. #5
    Join Date
    Aug 2008
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    Reno, Nv
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    Cynthia..please start turning. start turning now...avoid the delay...just do it. Go buy a little Jet or Delta and make something...please???
    Your Respiratory Therapist wears Combat boots

  6. #6
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    We have cookies.
    It could be worse You could be on fire.
    Stupid hurts.

  7. #7
    Join Date
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    When you come down Cynthia I will show you some books that explain it real easy. I might have something set up to show you how it is done. It is easier than it sounds ad yes you seem to have lots of questions about lathes You can feel that pull can't you The vortex is calling you and remember we have cookies.
    Daily Thought: SOME PEOPLE ARE LIKE SLINKIES..... NOT REALLY GOOD FOR ANYTHING BUT THEY BRING A SMILE TO YOUR FACE WHEN PUSHED DOWN THE STAIRS...............

  8. #8
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    Oh boy i feel the need to get hold of glass man Brian and whisper some words in his ear. You aint never getting those bookshelves if you touch the spinny stuff. Stick with flatwork.
    cheers

  9. #9
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    Quote Originally Posted by Chuck Thoits View Post
    Cynthia in this thread http://familywoodworking.org/forums/...ad.php?t=22621 post 6 in one of the pics you can see where I marked the the handle in black. That is the only place the tool cuts when the work is off center. It starts out being a very short cut and as material is removed it get longer.
    Chuck, why does it have to be oval?

    Quote Originally Posted by Rob Keeble View Post
    Oh boy i feel the need to get hold of glass man Brian and whisper some words in his ear. You aint never getting those bookshelves if you touch the spinny stuff. Stick with flatwork.
    No worries, Rob, I'm just asking some questions is all..........I am curious though, what if someone wanted to buy a small lathe.....not me of course....just to see if they liked turning or not.....what should they buy?.....

    Quote Originally Posted by Drew Watson View Post
    When you come down Cynthia I will show you some books that explain it real easy. I might have something set up to show you how it is done. It is easier than it sounds ad yes you seem to have lots of questions about lathes You can feel that pull can't you The vortex is calling you and remember we have cookies.
    thanks Drew....we'll have a busy day!!
    AKA Young Grasshopper Woodworker
    AKA The Rookie

  10. #10
    Join Date
    Aug 2007
    Location
    Reno NV
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    Cynthia, check any axe handles or hammers you have. You'll find they typically have oval handles. Just more comfortable for the hand to grip than a perfectly round one.

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