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drtikol's 2 dof Seat shaker

Discussion in 'DIY Motion Simulator Projects' started by drtikol, Aug 1, 2016.

  1. drtikol

    drtikol Member

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    Hi guys,
    so finally I can say that I've started with my project. My plan is to build 2 DOF Seat motion with possible future upgrade with Traction loss as I'm fan of road cars simulations (recently Assetto Corsa) and rally(used to be Richard Burns Rally) Dirt rally actually.
    As I want to be as cheap as possible I plan to use wiper motors + Arduino & Monster Moto shields. This is my first motion project so it could possibly turn out to be "proof of concept" or more likely "proof of my abilities" as many members verified the concept already. Looking forward to weeks and months spent building motion rig with the community support I can feel from all threads . Some pictures will follow shortly.
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  3. drtikol

    drtikol Member

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    So couple of pictures to show what I'm working with so far. First day was pretty much disassembling 2x wiper mechanisms I got from second-hand BMWs 3-class model E46(pretty old now I know) but they are made by Bosch in Germany so "should" hold some reliability. I got them for 20$ each and actually they look in mint condition.I opened the plastic back cover to see the transmission and they both look like new inside-full of slightly yellow grease so I guess they are OK.

    Attached Files:

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  4. drtikol

    drtikol Member

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    Next thing was to clean up a bit the joint to be used under the seat. As wipers it is a cardan joint from used truck car (unfortunatelly from BMW as well as it would cost 15$ more than actual one I got for 7bucks). The top part is quite close to axle of turn so it should fit the need (to keep seet as close as possible to the axle of turning) and the bottom part allows some space under the seat for motors, electronics, PSU etc.

    Attached Files:

  5. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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  6. drtikol

    drtikol Member

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    Thanks @noorbeast ! I was aware of a need of grounding wiper motors but not aware of grounding isolation (yet). Thank for that.
    I'm lucky that I have skilled folks around me who could do the technical stuff but as you said I take this as a learning as I want to try and learn new things (I've always thought that soldering is for strange people :grin).
    I'm intrigued of an idea or re-using things which seem to be dead/useless.
  7. drtikol

    drtikol Member

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    Just for clearing my head around how the wiper will work with levers I just tried to simulate lever arm with parts from wiper structure.
    In theory, would this work if mounted to shoulder height of the back of the seat?
    Should the angle marked red be perpendicular and fixed or moveble to allow arm to extend?

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  8. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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  9. drtikol

    drtikol Member

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    Thanks again. Please disregard my silly question regarding fixed/flexible angle, watched some videos again and needs to be flexibe of course.
  10. drtikol

    drtikol Member

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    Yet another Christmas! I must have been vey nice last year:)
    Is the USB power source enough for the Arduino/Genuino or do I need to plug dedicated power source?

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  11. drtikol

    drtikol Member

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    and few hours later another delivery(I would love to have my job projects go that just in time:thumbs): HP PSU DPS-600 to be modded.
    Got it for 20$ from second-hand market here in Czech.

    So basically what I got now:
    1x Genuino (and plus 2x dirty cheap chineese clones for 2$/ea which I ordered together with Monster Motos)
    2x Monster Moto shields (bought from chineese seller "verified by @Pit here: https://www.xsimulator.net/community/faq/reputable-monster-moto-suppliers-testing-before-use.158/

    1x HP DPS-600 (as mentioned above)
    2x HAL pots 6127V1A360L.5FS from here for 15$/ea (I stupidly missed free shipping by 2$ and basically wasted 20$ :mad:)
    http://cz.mouser.com/Search/Product...rtualkey57700000virtualkey858-6127V1A360L.5FS

    2x Bosch wiper motors (CEP 12V) from BMW E46 (to be tested and ground isolated if needed)
    1x U-joint from truck (czech made Avia if someone interrested:)) cardan
    https://www.google.cz/url?sa=i&rct=...ZVyPFZCKrGd8o7QkoZo-Hasg&ust=1470825797030347

    So from electronic/motion point of view I've got all I need to start my build, right?

    Attached Files:

    Last edited: Aug 9, 2016
  12. drtikol

    drtikol Member

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    Motors grounds isolated(hopefully) so if it kills me now it's up to you guys

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    • Funny Funny x 1
  13. drtikol

    drtikol Member

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    I got it! The last component for my build - seat from Subaru Impreza GT96. Why not at least sit in it if I could not afford whole car;)

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  14. drtikol

    drtikol Member

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  15. drtikol

    drtikol Member

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  16. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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  17. drtikol

    drtikol Member

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    Thanks @noorbeast so as long as angles are within this range is OK,right? There is not a single "Best angle" ? Because I could adjust measurements of rods and construction to serve the best purpose.
  18. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    In terms of best angle the most effective use of torque is under 40 degrees either side of right angle, but other practical design considerations come into play.
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  19. drtikol

    drtikol Member

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    Little bit of progress, my soldering skills improved by huge leap (from actually no skill). Now I'm puzzling how to connect any type of rod between the motor (drilled holes through motor covers and there is some kind of very solid plastic inside) and potentiometer. There should not be a huge friction when potentiometers rotates, correct?

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  20. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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  21. drtikol

    drtikol Member

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    Thanks @noorbeast but I expressed myself wrong probably. I've got flex mounts bought for rod-to-pot connection but problem..ehh challenge here is how to connect rod itself to the motor. I'm thinking of try to melt plastic part of the motor little and connect it with hard plactis rod that way. i.e. plumbers do the connections of tubes.