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Seat mover - two options - which one is better?

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by Thirsty, Aug 9, 2016.

  1. Thirsty

    Thirsty Member

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    This is about how to control roll and pitch with Simtools.
    The two types I want to compare are:

    1. simx-style seat mover with two actuators going on whatever angle up to the top of the backrest of the seat and the whole seat frame pivoted under the seat using a steering knuckle for instance

    2. seat mover frame with two actuators in a configuration where one of them is solely covering roll and the other one solely doing the pitch movement. That would be a frame around the seat which holds the seat allowing it to roll using two bearings (front and back) which is sitting in another frame which allows it to pitch (two bearings either side of the seat). Then there are two vertically mounted actuators moving these 2 frames. For this concept there's no need for a steering knuckle under the seat.

    I'm sure option 2 is significantly more stable and the other advantage is that this concept makes it possible to raise the 3-dimensional pivot point up to the level you're sitting on.

    So my question is which concept is easier to control using Simtools?
    I would think it's option 2 as it is physically separating roll and pitch movements, whereas in option 1 roll and pitch is a product of both actuators working together.
    Still, it may not matter...no idea...that's why I'm asking.
  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    The design makes no difference as far as SimTools goes, there is just a difference in terms of how you configure it.

    So if an actuator only controls one axis/force then you allocate an Axis Assignment of 100%, say for a joyrider design.

    In a shoulder style design you split that 100% Axis Allocation between the various axis/forces and SimTools takes care of mixing them, based on the game data: https://www.xsimulator.net/community/faq/steps-to-create-a-motion-profile.228/

    There are other design considerations, like which design suits a particular form of motion simulation. A joyrider design is better suited to flight simulation and the shoulder mount seat shaker is better suited to race simulation.
    • Informative Informative x 1