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2DOF seat mover build

Discussion in 'DIY Motion Simulator Projects' started by Dane Anthony, Feb 4, 2019.

  1. Dane Anthony

    Dane Anthony New Member

    Joined:
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    Botanist
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    Little Rock, Arkansas
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    My Motion Simulator:
    2DOF, DC motor, Arduino
    Hey everybody,

    This is my first motion simulator build. After reading through a large amount of threads I've decided to start with a simple seat mover using worm gear motors. Wiper motors seem like they would eventually need upgrading so the extra money for good motors seemed like a valid choice. I will be using an arduino uno in combination with monster moto controllers for the motors.

    So here's the first post of the build. I bought some 1" square metal tubing for the frame. I've cut the pieces for the part of the frame where the bucket seat will mount and will be welding them shortly. The seat and pedal setup will all be attached to a single plane of the frame(go kart style) unless I decide to raise the seat up a few inches. I extended the sides of it out far enough to more conveniently mount the harness.

    Metal was from home depot ~&17 per 6 ft section
    Additional metal was from Amazon ~$14 per 4 ft section after buying all of home depot's supply

    I cut the metal with an angle grinder then used a grinding wheel to take off sharp corners and clean up the areas that will be welded together.

    Hopefully I'll get this welded and drill the seat mounting holes out within the next few days for my next post.

    Attached Files:

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  2. Dane Anthony

    Dane Anthony New Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    The seat bracket is welded and drilled out. I've also bolted angle iron to the front for mounting the steering wheel and pedals. For the main joint I'm using part of a CV assembly from what I believe is for an ATV side-by-side. I made a small metal bracket and drilled out a hole for the CV. This bracket will be bolted on after I find the center of mass. The idea is to be able to disassemble the rig enough to easily fit it in a vehicle for transport.

    Note: This is the first thing I've ever welded, so I'm aware of how ugly these some of these welds look. My brother had to fix some of them... 20190203_123134.jpg 20190203_124837.jpg
    • Like Like x 1
  3. Dane Anthony

    Dane Anthony New Member

    Joined:
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    Occupation:
    Botanist
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    Little Rock, Arkansas
    Balance:
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    Ratings:
    +9 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    Also I've created a small bracket for the shifter on the side. It is also bolted on. I used angle iron and square metal tubing for the main frame and particle board as a platform for the shifter to sit. 20190206_174733.jpg 20190206_174743.jpg 20190206_174824.jpg 20190206_174907.jpg
  4. Ijanen

    Ijanen Living Room Mechanic

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    precision mechanic, media designer
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    My Motion Simulator:
    2DOF, DC motor, Arduino
    What kind of universal joint do you have? In the picture, it looks like
    it's a drive shaft from a front-wheel drive car. These are not suitable
    because they can twist. If so, it's better to get something like that.

    Attached Files:

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    • Informative Informative x 1
  5. Dane Anthony

    Dane Anthony New Member

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    Botanist
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    +9 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    Hi Ijanen,

    I was unaware of this, so thank you for the heads up! It is an outer CV joint from an ATV side-by-side. However, I do have a u-joint like the one in your picture as a backup, so looks like I will be using it instead. Thanks again for the insight!
    • Like Like x 3
  6. Dane Anthony

    Dane Anthony New Member

    Joined:
    Jan 11, 2019
    Messages:
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    Occupation:
    Botanist
    Location:
    Little Rock, Arkansas
    Balance:
    83Coins
    Ratings:
    +9 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    I just finished making the steering wheel mount. I used a piece of angle iron and some square tubing to make a clamp that will tighten on the frame (in picture). I welded another piece of tubing on this that supports the platform of the steering wheel. This setup lets me adjust the position of the steering wheel up, down, forward, and backwards to dial in a little bit of comfort. I believe this design will be sturdy enough as is, but I can't predict what will happen once the rig is moving.

    I guess I should also mention that I'm using a Logitech G29 steering wheel and shifter. It was the setup with the best reviews in my price range.

    I am currently building a platform for the pedals. I'm going to take them out of the stock enclosure and flip them upside down. I've also began putting together the base of the rig where the motors and electronics will be housed. I'll post pictures once it is finished.


    20190209_103638.jpg 20190207_154349.jpg 20190207_154528.jpg
    • Like Like x 2
  7. Dane Anthony

    Dane Anthony New Member

    Joined:
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    Occupation:
    Botanist
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    Ratings:
    +9 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    Alright, it's been a bit since I've posted, but here is the update. I've attached a harness for the seat and began working on the base of the sim. 20190209_104419.jpg
  8. Dane Anthony

    Dane Anthony New Member

    Joined:
    Jan 11, 2019
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    10
    Occupation:
    Botanist
    Location:
    Little Rock, Arkansas
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    Ratings:
    +9 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    Here is the evolution of the base. I'll have to add on some extra length to the front and sides to ensure it's stable enough under operations. I've also switched the CV style joint out for a standard U-joint as the CV joint gave unwanted rotational movement. Everything was pretty much made of 1" square tubing with some additional thick metal strips to reinforce the column that will be holding the seat. 20190216_141955.jpg 20190226_171207.jpg 20190309_153232.jpg
  9. Dane Anthony

    Dane Anthony New Member

    Joined:
    Jan 11, 2019
    Messages:
    10
    Occupation:
    Botanist
    Location:
    Little Rock, Arkansas
    Balance:
    83Coins
    Ratings:
    +9 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    Here is a picture of the seat mount on top of the base 20190226_180047.jpg
  10. Dane Anthony

    Dane Anthony New Member

    Joined:
    Jan 11, 2019
    Messages:
    10
    Occupation:
    Botanist
    Location:
    Little Rock, Arkansas
    Balance:
    83Coins
    Ratings:
    +9 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    I decided to try and make mounts for the motors out of square tubing and angle iron. I think it will work fine so long as I can attach them to the base well enough. 20190311_173005.jpg 20190311_172954.jpg
  11. Dane Anthony

    Dane Anthony New Member

    Joined:
    Jan 11, 2019
    Messages:
    10
    Occupation:
    Botanist
    Location:
    Little Rock, Arkansas
    Balance:
    83Coins
    Ratings:
    +9 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    I've attached the motor mounting brackets to the base of the frame at the angle calculated from SimCalc. Next step will be attaching the motors and connecting them to the back of the seat. I'll have to go pick up some materials to get to that part, but once that is done, it'll be ready for electronics! Hopefully I can start testing out simtools early this summer.

    Attached Files:

    • Like Like x 1