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First Motion Sim - 2DOF Seat Mover With DIY Peripherals

Discussion in 'DIY Motion Simulator Projects' started by CBC_North, Jul 10, 2018 at 06:35.

  1. CBC_North

    CBC_North New Member

    Joined:
    Jun 29, 2018
    Messages:
    3
    Occupation:
    Computer Engineer
    Location:
    Ottawa, Canada
    Balance:
    33Coins
    Ratings:
    +4 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    Starting this build log to track progress on my first motion simulator. Will feature:
    - 2DOF seat mover (Leaning towards shoulder mounted now but also looking at compact desk racer)
    - 3 bass shaker channels running simvibe
    - DIY peripherals - Sequential shifter, handbrake, pedals

    I currently have an 80% functional sim without motion. Based it off the wooden "Death Mobile" design over at ISRTV. Really like what the bass shakers added using simvibe but instantly wanted more feedback. This got me looking for motion sims and ultimately subscribed to this forum. Tons of great inspiration here and I'm going to be taking heavily from it for my design.

    Picture of my current rig below. More details of what I currently have and my plans will come later...

    Current_rig.jpg
    • Like Like x 3
  2. Zeraxx

    Zeraxx New Member Gold Contributor

    Joined:
    Jun 28, 2018
    Messages:
    25
    Balance:
    205Coins
    Ratings:
    +8 / 0 / -0
    My Motion Simulator:
    2DOF
    Welcome, and welcome to your newest addiction, I just completed my first motion seat mover (2DOF) and the first time I used it I couldn't help a grin from ear to ear, that being said an hour later I was already starting to think of what else I could add.

    Regarding your decision about seat mover design. In addition to your storage requirement, you need to consider what type of motors you will be using also. If your going to be using smaller motors your going to want as much leverage as possible not only to produce snappy,strong movements, but also to keep temperatures down and prolong the life of your motors/psu/motor controllers.

    I used the PGsaw 50:1 80 rpm 12v 60Nm Torq. Motors from Ebay for a compact (under the seat mounted motor) and I can say the experience is amazing, but if you don't have as much torque i'd definitely consider going over the shoulder.
  3. CBC_North

    CBC_North New Member

    Joined:
    Jun 29, 2018
    Messages:
    3
    Occupation:
    Computer Engineer
    Location:
    Ottawa, Canada
    Balance:
    33Coins
    Ratings:
    +4 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    @Zeraxx Thanks for the welcome, I've actually already ordered the identical motors (50:1 from pgsaw on ebay). I figured the extra torque will give me a little more flexibility in my design. The motors should be here tomorrow.

    I've paired those with two 750W Dell NPS-750BB power supplies. Got them used off ebay for $32 CAD + shipping from ebay.

    IMG_20180710_182022.jpg

    I also bought the universal joint for the platform. There's a very good junk yard near me where you pull your own parts and pay a flat fee per part type despite what car it came from. It's where I got the seat for the rig in the first post. $40 CAD for a passenger seat from a 2007 Mitsubishi eclipse. It's actually fairly nice with suede on the bolsters and headrest but its fairly heavy. I was originally going to pull a driveshaft from the yard to salvage a u-joint ($36) but took a trip to princess auto first and am glad I did. For only $4 more I was able to get a nice beefy hardened steel universal joint and not have to crawl under a car to saw it out.

    IMG_20180710_182221.jpg IMG_20180710_182303.jpg

    A co-worker has a mig welder I can loan and I have welded in the past but I might bring this to a proper shop to get a top and bottom flange/plate welded to it. Will depend on what kind of a quote they give me. I plan on making the base/motor mounts out of heavy aluminum square stock and plate. I have a good blade for cutting aluminum on my tablesaw so I would be able to make very accurate cuts. My CNC router is also nearing completion and I'm optimistic that I will be able to mill up to 1/4" aluminum plate with it (albeit slowly). It's a "Mostly Printed CNC" (MPCNC).
    IMG_20180710_183342.jpg

    Going to start the CAD for the base tonight.
    • Like Like x 1
  4. CBC_North

    CBC_North New Member

    Joined:
    Jun 29, 2018
    Messages:
    3
    Occupation:
    Computer Engineer
    Location:
    Ottawa, Canada
    Balance:
    33Coins
    Ratings:
    +4 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    After combing through almost the entirety if the projects forum I've decided to go with a compact desk racer vs the shoulder mounted design for the following reasons:
    - Simpler and cheaper to fabricate. Won't have to fabricate the tall metal frame that extends up the back of the seat and my connector rods can be much shorter. This will limit welding as well.
    - Smaller footprint. Half of my unfinished basement (about 14' x 20') is my VR mancave. This is going in the corner of my VR play space so the larger it is, the more space I will lose from the area I use to play other games.
    - The motors I have (pgsaw 50:1) should be plenty strong for this type of rig.

    Any counter arguments to the above?

    As for a compact seat mover design, when mounting the connecting rods to the side of the seat, any advantages in mounting near the back vs the front? With a person in the seat I'm thinking the centre of gravity will likely be around the center of the chair base so neither way will give any more leverage than the other? If I mount it near the back I'm thinking I can drill a hole in the metal frame brackets of the reclining mechanism in the seat. If I mount near the front I will have to fabricate external brackets.