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Question about power issue?

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by Joonas Temonen, Feb 17, 2025 at 05:58.

  1. Joonas Temonen

    Joonas Temonen New Member Gold Contributor

    Joined:
    Jan 3, 2025
    Messages:
    15
    Balance:
    19Coins
    Ratings:
    +6 / 0 / -0
    My Motion Simulator:
    2DOF
    Hello!
    I have just build New 2dof simulator and I have weird problem.
    Everytime I close smc3 utilities or sim tools, both motors goes down. When I start game, motors goes up where it should be.
    In game everything also works like it should. Its just annoying because rig doesnt stay where it should be all the time.
    How do I get motors to stay In their positions? Is It possible that my psu doesnt give enough power? Psu has 24v/15amp. Motor is 16 amps each.
    Earlier I had 2dof seat mover and there was no problem like that.
    In seat mover I had 2 wiper motors and now I have 2 big wheelchair motors. I have changed Electronics to 24v.
    I have ibt-2 and arduino Uno.

    Attached Files:

    Joonas Temonen, Feb 17, 2025 at 05:58
    #1
  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
    Messages:
    21,346
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    St Helens, Tasmania, Australia
    Balance:
    149,741Coins
    Ratings:
    +10,957 / 54 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    That sounds like the motors can be back driven, that means they can be moved when power is not applied as a result of the load on them.

    This often relates to both design and the ratio of the wormdrive. For example, on my compact 3DOF I currently use 60:1 wormdrives, which can't be back driven, but previously used 50:1s, which were initially OK when brand new, but after a little use they loosened up and could be back driven. I have previously used 25:1s and they are easily back driven.

    For motors that are back driven the low tech solution is pivoting chocks, for when there is no power: https://www.xsimulator.net/communit...k-driving-when-not-powered.14900/#post-200346
    noorbeast, Feb 17, 2025 at 06:08
    #2
  3. Joonas Temonen

    Joonas Temonen New Member Gold Contributor

    Joined:
    Jan 3, 2025
    Messages:
    15
    Balance:
    19Coins
    Ratings:
    +6 / 0 / -0
    My Motion Simulator:
    2DOF
    Thanks for really quick answer! I have seen those on other peoples projects and now I think im going to test those!
    Thank you!
    • Like Like x 1
    Joonas Temonen, Feb 17, 2025 at 06:11
    #3