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Rack and Pinion Actuator similar to dbox (Thoughts and Opinions?)

Discussion in 'DIY Motion Simulator Projects' started by John Alexander, Mar 15, 2020.

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  1. John Alexander

    John Alexander New Member

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    A little over a year ago I built a 2dof motion simulator that has been running great, however I have been wanting to build a 3dof simulator for sometime but didn't have the right inspiration.

    https://www.xsimulator.net/communit...uilt-with-slim-tarp-motors.12923/#post-171607

    Recently I observed the SimRig SR1 motion simulator platform, which uses worm gear motors to drive what appears to be a rack and pinion system. It looks very efficient and affordable.




    [​IMG]

    It has 70mm of travel and uses a 500w power supply with a max payload of 175kg. Guessing they are using around 120 watt motors.

    I am thinking with better motors (150 watt plus) I would comfortably be able to do the same thing and either step up the payload, or speed.

    My research so far has lead me to believe a JR dragster rack and pinion would do great.
    They have 3.5 in of travel (90mm) and lock to lock is achieved with 7/8th turn.
    https://www.arcracing.com/1401-rack-pinion-horizontal/


    [​IMG]

    This leads me to believe that a 100 rpm motor will achieve around 100+ mm/s of travel.

    What results has anyone gotten with a similar set up and what suggestions does the community have if I were to go this direction?

    Big questions I have are:
    Motor wattage?
    Motor Speed?
    Motor Torque?
    Best way to mount together?

    Thanks again for the help/support.

    ~Cheers
    Last edited: Jun 17, 2020
  2. Ads Master

    Ads Master

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  3. Djalma Ribeiro

    Djalma Ribeiro Member

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform
    I am confident in this format. It seems simple and easy to replicate.

    I think we should do an open source project "based" on Simrig Sr-1. We will use 3d printer, aluminum openbuilds and engines common to be found all over the world (truck cleaners).

    What do you think of the idea?
  4. Gadget999

    Gadget999 Well-Known Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino, 6DOF
    I think the rack and pinion design is overlooked

    There is a type with 2 racks opposite each other and has double the movement ;)

    Its also cheap to buy the rack and gear

    A steering rack may be suitable and some of them are already electically powered
  5. Djalma Ribeiro

    Djalma Ribeiro Member

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform
    Excuse me. I didn't quite understand what I meant.

    What is the other type of rack?

    Rack and pinion is overlooked for not being a good solution or is it a good solution that people ignore?
  6. John Alexander

    John Alexander New Member

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    Can't believe I let this get passed me. I think its a phenomenal idea. More than willing to start working on it!!
    • Like Like x 1
  7. CleverName

    CleverName New Member

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    Just stumbled upon this... looks like a fantastic idea. Anyone working on this??