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Technical More Machining The Rotary Table

Discussion in 'The Hokey Ass Message Board' started by ekimneirbo, Apr 8, 2020.

  1. ekimneirbo
    Joined: Apr 29, 2017
    Posts: 1,120

    ekimneirbo
    Member
    from Brooks Ky

    Since there is some interest in learning some of the basics about using machine tools, I'm gonna post a few more pictures to explain how to use a Rotary Table for basic stuff. Enjoy!

    Edit: Everyone needs to realize that all machining is done by locating a part directly under the center of the spindle of the machine, and then moving in relation to that established centerline. This is one of those times when I'm saying something that is not always true, but for the purpose of understanding basic machining accept it as true for learning purposes.;)

    Rotary Table Alignment 1.JPG
    Rotary Table Alignment Tool 1.JPG
    Rotary Table Alignment Tool 2.jpg
    Dial Indicating 1.jpg
    Digital Readout 1.jpg
    Rotary Table Graduations 1.jpg
    Machining a hole 1.jpg
    Finished hole 1.JPG
    Hope that peaks some folks interest and shows how simple some machining can be.;)
     
    Last edited: Apr 8, 2020
  2. nrgwizard
    Joined: Aug 18, 2006
    Posts: 1,167

    nrgwizard
    Member
    from Minn. uSA

    Thank you for the short write-up n pics.
    Marcus...
     
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  3. Boneyard51
    Joined: Dec 10, 2017
    Posts: 4,020

    Boneyard51
    Member

    Ekimneirbo, you talk about machining being simple? When I started in a machine shop back in 1976 or so, I asked an old hand about machining! He said “ it’s simple, kid, just cut away all the metal that is not part of the part you are making” ! Lol!! I will always remember that and have used it a few times! Lol










    Bones
     
  4. sliceddeuce
    Joined: Aug 15, 2017
    Posts: 2,982

    sliceddeuce
    Member

    Rotary table is a handy device.
     
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  5. ekimneirbo
    Joined: Apr 29, 2017
    Posts: 1,120

    ekimneirbo
    Member
    from Brooks Ky

    I always thought that the metal was only there to keep the holes on location :D
     
  6. DDDenny
    Joined: Feb 6, 2015
    Posts: 13,450

    DDDenny
    Member
    from oregon

    John Buttera was quoted as saying that when one of the car rag guys interviwed him.
     
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  7. sliceddeuce
    Joined: Aug 15, 2017
    Posts: 2,982

    sliceddeuce
    Member

    Nice of John to mis- quote Michelangelo
     
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  8. Hemi Joel
    Joined: May 4, 2007
    Posts: 821

    Hemi Joel
    Member
    from Minnesota

    Good stuff, thanks for posting. Very timely for me, as I have 2 projects needing rotary table work that I will soon get working on.
     
  9. GordonC
    Joined: Mar 6, 2006
    Posts: 1,987

    GordonC
    ALLIANCE MEMBER

    Many years ago I worked for a computer company doing CNC programming for sheetmetal punch presses. Because I showed an interest in machining as well I learned how to do CAD/CAM CNC work for the machine shop. We had three 3 axis machining centers and one 5 axis machine. Did so well with it I ended up managing it and loved the rapid prototype low production computer components we were producing. Wish I had a couple million dollar machine shop at my disposal now making hot rod stuff!
     
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  10. Bonehead II
    Joined: Apr 18, 2005
    Posts: 397

    Bonehead II
    Member

    I have a drill mill and a 13" lathe at home, I wanted to learn more so I contact my local high school for night class to take machine shop, they no longer have the course. So I went to our local collage, and they don't have night school any longer. So I asked about full time day course in machine shop, They said that they no longer teach machine shop. I think that's sad....I want to learn but no one wants to teach...I guest everyone want's to push button's today...
     
  11. sliceddeuce
    Joined: Aug 15, 2017
    Posts: 2,982

    sliceddeuce
    Member

    Best machining advice I ever received was "Introduce the cutter to the material, And one of them has to be in motion" . Might sound a little smart azz-like, but it helps you think outside of the lines. Example? I cut an internal key way in a bore using my lathe. Material in the chuck/grind a tool bit to shape/use carriage travel like a shaper. Voila'
     
  12. GordonC
    Joined: Mar 6, 2006
    Posts: 1,987

    GordonC
    ALLIANCE MEMBER

    Bonehead see if you have a local machine shop that will take you on as an intern (free labor) and teach you.
     
  13. MeanGene427
    Joined: Dec 15, 2010
    Posts: 1,438

    MeanGene427
    Member
    from Napa

    Have you ever used a laser centering tool? I got from an old guy at a swap a few years ago who said he was making them himself. If so, your opinion?
     
  14. Hemi Joel
    Joined: May 4, 2007
    Posts: 821

    Hemi Joel
    Member
    from Minnesota


    https://www.youtube.com/channel/UCpp6lgdc_XO_FZYJppaFa5w/videos

    LOts of really good learning is available on youtube. I like this guy. Also, make sure you have a machinists handbook, and learn the speed and feed tables. Old textbooks from tech school are great oo if you can find some.
     
  15. I don't know how familiar you are with using youtube, but there are quite a few excellent instructional articles available by doing a search. With you already owning a lathe, you will be able to put the information to use immediately. I thoroughly enjoy watching some of these guys doing their thing.
    If you need help finding good sites, just PM me.
    Bob
     
  16. Nice article, thanks for posting it.
    When I bought my rotary table in the 70s, that was the part of using the table that took me the most time. Because I had no formal training as a machinist, I happened on your trick logically. I thought to myself, I am always centering my projects by chucking something of the same diameter to center the hole, why not do the same with the table.
    It seemed so obvious after the fact, but it took me awhile to get there.
    Bob
     

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