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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. 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?
  3. 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
  4. 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?
  5. 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
  6. CleverName

    CleverName New Member

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    Just stumbled upon this... looks like a fantastic idea. Anyone working on this??
  7. Map63Vette

    Map63Vette Member

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    Something about that price just seems way over the top to me, assuming it's just the motors, power supply / control board, and software with no framework. Aren't those just wiper motors? They look pretty much just like them, but maybe the size is off in my head. So maybe $200-300 in motors and a $100 power supply? The 3D printed stuff can't cost that much either. Not sure I see where the nearly $3k price tag comes from.

    Not sure I really like the idea of 3D printing everything either, but that's just me being skeptical and what I know of 3D printing (have a printer myself, but haven't done anything quite like this with it). I'm not sure the plastic part bothers me as much as just the construction method.
  8. itsumairu

    itsumairu Active Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    Hey guys, been searching a diy project that based on SR1 design. any updates on this project?
  9. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    Its been over a year since @John Alexander has been active, so unlikely you will get an immediate response, perhaps other may chip in some more.
  10. itsumairu

    itsumairu Active Member

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    sorry to wake the old thread. I think the design is really fascinating, at least for me. It can be cost effective while I can use my 2dof motor for this design. I search for the SR1/2 and how it works (maybe a disassembly video), but nothing came up. looking for a friend who interested on this too.
  11. Al.Bundy

    Al.Bundy Member

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    My Motion Simulator:
    2DOF, 3DOF, DC motor, JRK
    must be something like this :

    lineair.jpg

    Attached Files:

  12. itsumairu

    itsumairu Active Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    yes, the mechanism is simple, but need a research to get it work on heavy load