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Hannibal's thread into DIY motion platform

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

  1. hannibal

    hannibal Member

    Joined:
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    My Motion Simulator:
    3DOF
    agreed. the more ppl in the mix is the more ppl involved in tweaking the software... the 6dof build is half the battle.. tuning is the other son of puppies!
  2. hannibal

    hannibal Member

    Joined:
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    My Motion Simulator:
    3DOF
    had a setback today,
    half the rods i made were stripped due to me cutting 3' threaded B7 alloy rods.. stupid cheap ebay uniburr did not properly chamfer the cut rod ends, so the nut stripped the threads... :( :( :(

    in mean time, order these cool connectors for the motor to sabertooth

    Amass XT60H Connectors

  3. Pierre Lalancette

    Pierre Lalancette Lalancelot Gold Contributor

    Joined:
    Dec 11, 2016
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    507
    Occupation:
    3D Technical Director
    Location:
    Quebec, Canada
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    4,367Coins
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    +499 / 5 / -0
    My Motion Simulator:
    6DOF
    Buy cheap, buy twice.
    I've been accused to go overboard, but it saved me so much trouble.
    But I understand the frustration. Time to switch to another part of the rig until you get replacement.
  4. hannibal

    hannibal Member

    Joined:
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    My Motion Simulator:
    3DOF
    im trying to strategically go cheap in some places, others not. in this case, i could have bought cheap 1' threaded rods, and not have to deal with the burring tool.. but i paid a lil more for B7 structural threaded rods, but buying the cheap tool made me lose out.

    i went to re-examine the rods.. i was able to get 4 sets of 4 rods, out of the 5 and a half sets.. so its not so much a total loss...
    i feel better.

    i thank you for your support @Pierre Lalancette :)

    back to the topic of u-joints and tie rod ends...
    i started to look at the orientation of angle for u-joints and tie-rod ends, since i am not fully confident of most of the DIY implementations.

    most ppl put u-joints and the bottom, and tie-rod ends on the top... but after receiving the tie rod ends.. the angle seems limited, even more so for the hiem joints that have a bolt through it (even more so ppl use acorn nuts and shave the edge to get more angle..)

    with this in mind i am seeing why people just dont use u-joints on the top and bottom. after looking at state of the art platforms, it see most use u-joints at the top and bottom..




    also the orientation of the u joint is parallel to the actuator.. but for the base, it seems to be position with angle such that it follows a circle? @wannabeaflyer2
  5. wannabeaflyer2

    wannabeaflyer2 Well-Known Member

    Joined:
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    My Motion Simulator:
    2DOF, Arduino, Motion platform, 6DOF
    Hi @hannibal the ideal would be UJ top and bottom but its my belief that this is also linked to the range pf travel for each platform , Given that our designs have a limited Travel range and the cost implication as well , you may find that most use the rose joints at the top because they are Fit for function in our case.

    Agree that UJ top and bottom are the Best way ( as seem on most High precision heavy load carrying platforms ) but the Overall size comes into play .. with the travel angles we use Rose joints form a good compromise ... Just my two cents worth again :)
    • Like Like x 1
  6. hannibal

    hannibal Member

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    My Motion Simulator:
    3DOF
    just wanted to post photos of progress...

    Attached Files:

    • Like Like x 5