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Show me your Universal Joints

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by Psionic001, Feb 9, 2019.

?

Do you make your own Joints or buy after market

  1. Designed and Built my own joints

    20.0%
  2. Purchased after market

    60.0%
  3. Found another way to use joints

    20.0%
  4. I don't use joints

    0 vote(s)
    0.0%
  1. Psionic001

    Psionic001 Active Member Gold Contributor

    Joined:
    Mar 5, 2017
    Messages:
    102
    Location:
    Sydney
    Balance:
    709Coins
    Ratings:
    +46 / 0 / -0
    My Motion Simulator:
    Motion platform, 6DOF
    I think the most difficult part of my 6DoF Stewart platform so far was finding the perfect universal joint for the ends of my Linear Actuators.

    I'm now on my V2 universal joint and I think it will be perfect. I designed them in Solidworks and had them manufactured in China. These are 7075 aluminium, sandblasted and anodised.

    Version 1 worked ok, but there was a tiny bit of rattle and slop. This version is nice and solid.

    This might be a good opportunity for others to show what solutions they are using for their Universal joints (U-Joint, Cardan Joint).

    Attached Files:

    • Informative Informative x 1
  2. Uros

    Uros New Member Gold Contributor

    Joined:
    Oct 9, 2014
    Messages:
    3
    Balance:
    200Coins
    Ratings:
    +0 / 0 / -0
    My Motion Simulator:
    2DOF, SCN6
    And how much did you pay for one pcs?
  3. Psionic001

    Psionic001 Active Member Gold Contributor

    Joined:
    Mar 5, 2017
    Messages:
    102
    Location:
    Sydney
    Balance:
    709Coins
    Ratings:
    +46 / 0 / -0
    My Motion Simulator:
    Motion platform, 6DOF
    I paid $60usd plus my design time plus shipping, plus the trunnions bearing.
    • Informative Informative x 1
  4. sam poole

    sam poole Active Member

    Joined:
    Nov 14, 2017
    Messages:
    132
    Location:
    midlands
    Balance:
    471Coins
    Ratings:
    +41 / 0 / -0
    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF, 6DOF
    That's a lot of uj how big is your rig?
  5. Psionic001

    Psionic001 Active Member Gold Contributor

    Joined:
    Mar 5, 2017
    Messages:
    102
    Location:
    Sydney
    Balance:
    709Coins
    Ratings:
    +46 / 0 / -0
    My Motion Simulator:
    Motion platform, 6DOF
    In terms of size for the 6DoF platform it is 1.4m diameter at the base. 6 actuators. Each actuator has a 490mm stroke and pushes 120kg at 500mm/sec.

    They need to be strong.


    • Like Like x 2