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Question Independence of axis for a Stewart platform?

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by Thomas Luzat, Mar 12, 2019.

  1. Thomas Luzat

    Thomas Luzat New Member

    Mar 11, 2019
    Web developer
    Wesel, Germany
    +1 / 0 / -0
    Before building a model, I am trying to get my head around this: Is it possible to extend/contract just one actuator at a time in a Stewart platform build without adjusting any others?

    If yes, that's great, but if not, I imagine that minor differences in what the actuators do or how precise the platform is built could introduce much stress to the components, given that errors would often be magnified through the platform acting as a lever...? Is that a problem in practice, do components need some clearance or flex? I am thinking of builds such as FlyPT's, which do seem to give little clearance.

    I could not find any mention of such problems, but maybe that's because the answer to my first question above is "yes" ...
  2. noorbeast

    noorbeast VR - The Next Generation Staff Member Moderator

    Jul 13, 2014
    Innovative tech specialist for NGOs
    St Helens, Tasmania, Australia
    +8,172 / 40 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    An actuator could move one at a time if it were just a dedicated force it drove, such as traction loss, but in most circumstances like a 6DOF rig actuators will be configured to respond for multiple axis output movements.

    Stress is not really an issue if actuators and rig are properly constructed and configured. FlyPT is certainly a boon for Stewart rig owners.
    • Agree Agree x 1