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Question Servos limits

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by monade, Jan 27, 2019.

  1. monade

    monade New Member

    Joined:
    Jan 27, 2019
    Messages:
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    Balance:
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    My Motion Simulator:
    6DOF
    Hi everyone,

    I intend to build a 6DOF Stewart platform similar to a few I have seen posted here, however at a smaller scale since it only needs to support a payload of 10-15 kgs (33 lbs).

    A few of you have already built models using RC servo motors which seem to simplify the whole system quite a bit and I am wondering if I could manage to stick with those for my machine.

    At the end of the day, it would mean building pretty much the same platform as the model in the following picture built by @xxpelle here however with a heavier payload (10-15 kgs), more powerful servos and if possible a larger rotational amplitude. Also similar to this one below (in principle and mechanics):

    [​IMG]

    I'm thinking/hoping:
    • RC servo: 60 kg-cm, 60 RPM (JX Servo PDI-HV2060MG 60KG-cm)
    • Rotational amplitude: 8 cms
    • Each leg would hold 7.5 kgs, total 45 kgs (maximum given a static platform in neutral position and ignoring everything else, which gives us a factor of 3 to 4.5, doesn't sound like a lot)
    Before getting into the details and trade-offs, does it sound like going with servos is a reasonable approach for these loads? If so what servos could fit the bill?

    Thanks a lot.