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4 Feet 3DOF Ethercat System

Discussion in 'DIY Motion Simulator Projects' started by TLRE, Apr 12, 2026 at 02:29.

  1. TLRE

    TLRE New Member

    Joined:
    Friday
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    My Motion Simulator:
    3DOF, Motion platform
    Did some research on what system to be used for my motion platform, studied SFX-100, Arduino, Thanos, Canbus, Ethercat, etc… end up go with ethercat due to chatgtp recommends it is the best among all system due to latency and synchronised motion which able to provide best experience and accuracy. After a year of work finally have the prototype completed and now in progress of making fine adjustments aim to further improve the following:

    1. Reducing aggressive movement during a crash while maintain minimal latency.
    2. When exit assetto corsa session, the rig will jump. Believe it is due to sudden change of position setpoint.
    3. Further improving latency as this is why i go with ethercat. Fine PID tuning and Flypt mover filtering still hard to breakthrough.
    4. Still findings best solution for the actuator feet (the interface between actuators arm and hard floor. Currently using neoprene rubber… )

    My setup specification:
    Game: Assetto Corsa + flypt mover (started with 3.5 now using 3.7 version)
    Ethercat Master: Ethercat PLC at 1ms cyclic time
    Drive: Ethercat capable drive
    Motor: 240vac servo motor with brake and 19bits absolute encoder
    Screen: Triple 32” 1000R 2k curved monitor (do not work well in Aesstto Corsa due to the curve, the setup look cool thou.)
    Computer CPU: Ryzen 5800, CPU run more than 50% load in flypt high accuracy calculation mode, 1ms output)
    Graphic card: RTX 4080 (graphic run smooth at high settings)
    RAM: 32gb DDR4

    I am living in Malaysia, the cost of the Ethercat drive, PLC, motors, actuators plus some accessories around MYR10000, approximately EUR2200.
    • Like Like x 1
    TLRE, Apr 12, 2026 at 02:29
    #1
  2. cfischer

    cfischer Active Member Gold Contributor

    Joined:
    Sep 7, 2015
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    398
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    Colorado
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    This is the first I've heard of people building a Sim with a plc. Can you provide us more information on that?
    cfischer, Apr 12, 2026 at 03:44
    #2