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Hannibal's thread into DIY motion platform

Discussion in 'DIY Motion Simulator Projects' started by hannibal, Feb 15, 2019.

  1. Flymen

    Flymen Flymen Gold Contributor

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    3/8 rod is perfect , and 18 plates 5 x5 and 6 others 3 x 4 1/2 , that I did !( or near of that depend what you have at home in your home scrap parts )
    Very important : the precision of alls holes is very important and more the center one if you don't want everything move like earthquake!!
    If you don't have again your ballscrew , put a extra 100$ each because the chiness one are very cheap( poor quality ) . I have 3 very good one with hight quality et 3 others ( chiness) and I can see the diference … lower sound when this travel, like -30% sound , long term quality , chiness have some defect too . For the bearing sleeve you have two choice : like my mine or the one like Pierre and silentchill … if the money is not a problem buy the one like them .
    Last edited: Mar 7, 2019
  2. hannibal

    hannibal Member

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    thank you again @Flymen


    so now i am researching shaft couplers..

    I see, sixdegreesofflight went with D40 L45 size couples with a rated torque of 10N.m with a max of 20N.m
    because @Pierre Lalancette has ampflow motors with 12.7mm shaft.. he went with rater torque of 7.5N.m

    I also went with ampflow motors with 12.7mm shaft... have my eye on D45 L66 size couplers with a rated torque of 30N.m (max 60N.m)

    is this excessive??

    now i see a D40 L55 with my desired size of 10mm x 12.7mm with 15N.m rating... this is good i think?
    • Agree Agree x 1
  3. Flymen

    Flymen Flymen Gold Contributor

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    My opinion info ! @Pierre Lalancette ,@SilentChill ,@pmvcda
  4. hannibal

    hannibal Member

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    im trying to find a balance for cost..
    i totally understand, you get what you pay for...

    ughh! so there is stainless steel ball screws and carbon steel ball screws?
    Last edited: Mar 7, 2019
  5. Flymen

    Flymen Flymen Gold Contributor

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    don't put a carbon steel ball screw !! o_O
  6. hannibal

    hannibal Member

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    ok, it just that carbon ones are more money.. the stainless are cheaper... i thought u were saying to spend more on the ball screw!
  7. hannibal

    hannibal Member

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    Do you guys remove the spacer from main bearing block in order to get a longer shaft below the block in order to connect the coupler?

    Attached Files:

  8. Pierre Lalancette

    Pierre Lalancette Lalancelot Gold Contributor

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    I was talking about the structure in general when I compared steel, aluminium and carbon.

    If it screw, it's for it holding it in place. If not, it's probably just so the holding screw presses only on the rotary part of the bearing.
  9. hannibal

    hannibal Member

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    when i received the parts, on the bearing block, there are 2 spacers, and 2 bearings that are on.
    if i put the ball screw on with all the items that it came with, i have less thread to put the nut that you are talking about. @Pierre Lalancette

    but if i remove one of the spacers, then i have more thread to screw on the nut...ill try to take a photo
    Last edited: Mar 14, 2019
  10. hannibal

    hannibal Member

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    One photo is with the space, another without.. im just wondering if you guys use the space to have more shaft length to screw the nut and coupler

    Attached Files:

  11. Pierre Lalancette

    Pierre Lalancette Lalancelot Gold Contributor

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    Ok, the spacer is on the other side. It looks like a ring to take all the weight on the moving part of the bearing. But I don't know. I don't remember such a thing on mine.
  12. hannibal

    hannibal Member

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    after looking at photos of your build, you have the 2 spaces and bearings on your block. but i cant tell how much of the coupler fastened to the ball screw shaft... where you able to seat the coupler to the middle of the coupler? i found the photo of yours.. seems like the same!! i wish the length of the ball screw and size of the actually allowed the fully exposed shaft end up to the screw threads.

    ***update***
    found mounting procedure
    https://cnc4you.co.uk/resources/Mounting Procedures.pdf

    Attached Files:

    Last edited: Mar 14, 2019
  13. hannibal

    hannibal Member

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    after getting extra 7mm length 12mm ID 16mm OD spacers and removed the 9mm length spacers, i was able to achieve about 14mm from the shaft to mount the coupler..

    Attached Files: