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2 DOF Wiper Motor - first project

Discussion in 'DIY Motion Simulator Projects' started by prada_logi, Nov 13, 2020.

  1. prada_logi

    prada_logi New Member

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    My Motion Simulator:
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    Hello,

    My first project is based on the Racing Mat idea:
    - 2DOF
    - andruino
    - 24 V wiper motor
    - SMC3 software.

    I made a mini test platform. For a few weeks I was doing tests and everything works fine (SimTools, SMC3 Utility, LFS Game, etc).

    I am starting to build the frame.

    I have one question about the wiper motor:
    When everything is turned off and I press motor arm very strong, it turns.
    Is it normal ? Does every motor behave like this and does it depend on the force used ?

    20201112_235251.jpg
  2. Ads Master

    Ads Master

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  3. Skuldi

    Skuldi New Member Gold Contributor

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    yes, that's normal. depending on the gear ratio its easier or harder to move them
  4. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    A motor that moves when un-powered is called being 'back driven' and as @Skuldi points out depends on gear ratio and is not uncommon.

    As an aside the MM will need a heat sink and fan, otherwise you will damage it.

    It also pays to test clone MMs before use: as many have Quality Control faults: https://www.xsimulator.net/community/faq/monster-moto-testing-before-use.158/

    Wiper motors do need to be ground isolated: https://www.xsimulator.net/community/faq/wiper-motor-mandatory-ground-isolation.25/
    Last edited: Nov 13, 2020
  5. prada_logi

    prada_logi New Member

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    My Motion Simulator:
    2DOF, Arduino
    It depends on gear ratio or torque ?
  6. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
  7. RacingMat

    RacingMat Well-Known Member Gold Contributor

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    if the gear box is made with "worm and wheel gears" it's irreversible
    [​IMG]
    or as Skuldi said, if the gear ratio is very high