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Showroom **RIP** - 6DOF project using 12v DC Motors, Sabertooth 2x60's (was MM's) and Arduinos + OSW

Discussion in 'DIY Motion Simulator Projects' started by SilentChill, Jun 2, 2015.

  1. Jamshaid

    Jamshaid Jamshaid Gold Contributor

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    My Motion Simulator:
    2DOF, 3DOF, DC motor, AC motor, SCN5, SCN6, SimAxe, Arduino, JRK, Joyrider, SimforceGT, Motion platform, 4DOF, 6DOF
    encoder do get the controller over loaded i agree how about if we give ARM basd arduino a try i hope that will work fine.
  2. BlazinH

    BlazinH Well-Known Member

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    Here’s an option for encoders that may work for some albeit a pricey one. They are hall effect absolute encoders. They are basically the same as BI Tech hall pots except they are only 10 bits but output a full 5-volt range (actually .015 to 4.978v). Therefore, they don’t have a dead band in the voltage like BI pots do when they flip over a revolution. So you can use them the same way we use hall pots now except a small amount of additional coding would be need to index what revolution they are on as they flip. However, they are absolute, so if your rig always starts up from the same position, then you will already know what the starting index revolution will be without having to move your rig to each end stop first to test it.

    I recommend the analog ball bearing units since they only cost $6 more than bushing but overall they are still expensive at $66.75 each. They also use a proprietary connector that’s not included so they charge a lot for it too ($8 for a connector with 3 foot leads). Also, don’t consider any pwm models. Their sampling rate is way to slow at 1000Hz or less and they require the processor to pause while it measures the sample.
    http://www.usdigital.com/products/encoders/absolute/rotary/shaft/ma3

    ps Even though they are only 10bits, if you are replacing a 10 turn pot, that is equivalent to 10240 unique positions.

    pps If you need 5 or more though the price drops to $45.40 each.
    • Like Like x 2
    • Informative Informative x 2
    Last edited: Jul 18, 2016
  3. Carl Slaughter

    Carl Slaughter New Member

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    I am very interested in this thread. Read the entire post. Thanks for keeping us informed. Are there location/part number of everything listed in one location? And how much wight do you think this will hold, I am about a buck 90, and I plan on using my Oculus Rift.
  4. SilentChill

    SilentChill Problem Maker

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    My Motion Simulator:
    DC motor, Arduino, Motion platform, 6DOF
    I have no idea how much weight it can hold never really tested it. I could do with better motors as mine are not quite powerful enough.

    Sorry no parts list as such just whats in the thread
  5. engenharia

    engenharia New Member

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  6. Michael Hensen

    Michael Hensen Active Member

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    My Motion Simulator:
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    Sorry to bother.. But I have build me a 6dof sim too and try to get it working with the Oculus CV1..

    The problem I am facing is that the harder I 'drive' the sim the more I sink down in the car and need constantly to recenter the view.. Do you have or had the same issue? if so how did you resolve it?!
  7. insanegr

    insanegr !N$@n€

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    • Like Like x 1
  8. Michael Hensen

    Michael Hensen Active Member

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  9. SilentChill

    SilentChill Problem Maker

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    My Motion Simulator:
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    Mine seems to of cured itself I never need to reset it anymore or maybve its just I have the camera really hard set on my rig so it doesnt move at all. I dunno
  10. Michael Hensen

    Michael Hensen Active Member

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    My Motion Simulator:
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    I noticed that you had it in the center of you rig.. perhaps that is the key..
    I have ordered the gimbal already, I always can use it for something else.. but I will try and mount it more stiff that I have right now.. perhaps some vibrations make the camera up/down vibrate and thus gets out of sync with the motion..
    At least I can give it a go :), otherwise I will have a gimbal by Wednesday to give that a shot..

    But I love to drive it in 6dof and CV1 .. even though I sink in the car now and have to recenter!!!!
  11. mayhem

    mayhem Cobra Commander

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    My Motion Simulator:
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    This is the build that brought me to the forum.
    It very inspiring to see how quickly this came together and how you were able to scrounge most of the elements as well as build in wood which is more approachable for someone like me just starting out.
    • Like Like x 1
  12. SilentChill

    SilentChill Problem Maker

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    My Motion Simulator:
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    Wood is nice and forgiving and can be chopped and changed very easily. 1 year on and it's still in 1 piece.
    • Like Like x 1
  13. Pit

    Pit - - - - - - - - - - - - - - - - Gold Contributor

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    Copy that, also I did use wood everywhere, easy to build, cheap and easy to change if needed. Not the best finish style imo, if this could be an argument (if I compare my rig to other)
    • Agree Agree x 1
  14. SilentChill

    SilentChill Problem Maker

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    My Motion Simulator:
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    Little update, ruff around the edges but its work in progress :p

    20160923_220928.jpg 20160923_220944_001.jpg
    • Like Like x 8
  15. wannabeaflyer2

    wannabeaflyer2 Well-Known Member

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    Yeah baby, now thats what im talking about :) nice work and love the fact your using Plywood no fancy CNC stuff mate, so you have shown a great alternative material ... eyeing this post as always :) well done @SilentChill
  16. SilentChill

    SilentChill Problem Maker

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    Thanks dude :) I have to use what I can use lol looks a bit crap but once it's painted it will be ok....... I hope.

    I've been custom designing lots of bits to print for the limit switches and pulleys and stuff.

    It's all taking far too long for my liking :D
    • Like Like x 2
  17. SeatTime

    SeatTime Well-Known Member

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    Looking good @SilentChill :thumbs. Noticed in your picture what looks like a linear flange type roller bearing for your main shaft :think. If it is, just like to point out that I found them to be a bit noisy and will wear over time the hollow carbon tube - I changed them out to a poly bush. As for taking too long - try 12 months for mine...:rolleyes:.
  18. SilentChill

    SilentChill Problem Maker

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    Yes @SeatTime I had already bought them and I do need to replace them with plastic bearings. I have asked for a sample like @wannabeaflyer2. If I can't get any I will get some soon as ibcan afford them as they are not very cheap for the housing and everything.
  19. SeatTime

    SeatTime Well-Known Member

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    My Motion Simulator:
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    I never priced a housing for the bushes, just purchased the bush and made a housing out of carbon fibre, so not too expensive. Unfortunately not everyone may be able to do that.
    • Agree Agree x 1
  20. SilentChill

    SilentChill Problem Maker

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    Ok so I forgot I got some flange bearings from IGUS lol

    I have 3d printed a housing for them hopefully it will be strong enough.

    Also I have printed the addon bracket for the ball screw which I will attach vslot wheels to stop any unwanted spinning.

    Please forgive the horendous bonding of the carbon I made a right mess of it, but it has worked that's for sure.

    20160925_200332_001.jpg 20160925_200400.jpg 20160925_200931.jpg upload_2016-9-25_20-17-20.png

    upload_2016-9-25_20-17-39.png
    upload_2016-9-25_20-18-30.png

    That's all for now :)
    • Like Like x 5
    Last edited: Sep 25, 2016