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Showroom 3-DOF Flat-bed Drifting simulator with AC motors [ Finished ]

Discussion in 'DIY Motion Simulator Projects' started by speedy, Apr 5, 2016.

  1. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    Why not direct mount the Hall sensor rather than use gears? It is simpler and the Hall sensors are accurate enough.
  2. speedy

    speedy Well-Known Member

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    I had to use more than one turn on the timing pulley and hall effect sensors are just 360 deg. max.
  3. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    How many degrees does it currently rotate? Is it possible to get it back to 360 by using a bigger idler pulley, with a direct mounted Hall sensor, would it physically fit the design? Just spit balling simple ideas, as gears would work just fine.
  4. Historiker

    Historiker Dramamine Adict Staff Member Moderator Gold Contributor

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    I had been playing around with printing my own gears, it worked very well. If you have access to a printer it would be worth a try. @bruce stephen did this with his 2DoF rig.
  5. speedy

    speedy Well-Known Member

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    @noorbeast ... allow me to elaborate more ... all 3 axis now have a big travelling distance about 90cm or so which occupy about 8-9 turns of the old 10 turns pot , and with a 2.8 cm diameter timing pulley and belt ... the blue pot worn out internally from all the back and forth movements ... But gave me a very good motion resolution which I can't give it up ...

    I've searched the market locally today and didn't find the required Hall effect sensor like the one you guys are using ...
    2319659-40.jpg

    But I found something that can really makes you wonder where was that before ... a Precision Industrial Potentiometer 5K ohm and 10K ohm without polarity restriction for the 5 volt and ground connection it also works on the 3.3v of the Ard. ... endless rotation repeats itself every 180 360 degree [ working area ] .
    20160727_201044.jpg

    20160727_201056.jpg

    20160727_140222.jpg

    20160727_140308.jpg
    the same configuration as Mod 157 datasheet but with a 10K ohm resistance ...
    http://www.vishay.com/docs/57042/157.pdf
    Last edited: Jul 28, 2016
  6. speedy

    speedy Well-Known Member

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    I'll try with a bolt and nut to have about 10cm or so linear motion out of a rotating bolt ... then convert this 10 cm to a 180 degree on the pot axle with a plastic disk or something ;) ...
  7. Historiker

    Historiker Dramamine Adict Staff Member Moderator Gold Contributor

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    Not sure which 10 turn pots you have been using but I found that the type with metal brackets holding the body together have never given me any problems on my rig at all. They have the same Bourne model number so I am not sure how to tell them apart other than the metal bracket. I do not have access to my platform right now, sorry that I cannot post the exact model number that I am using.
    • Like Like x 1
  8. speedy

    speedy Well-Known Member

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    Yes, I know that metal bracket model and this is what I've been using ...

    20160727_204804.jpg

    20160704_125650.jpg
    Last edited: Jul 27, 2016
  9. cthiggin

    cthiggin Active Member

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    Speedy,
    You ALWAYS get it figured out.............good thread, interesting stuff.
    Blessings,
    Tom
    • Friendly Friendly x 1
  10. speedy

    speedy Well-Known Member

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    Thanks buddy ... hug:

    But I'm really cornered right now :( ... replaced the erratic pots with a same blue old ones and experimenting on the new halleffect pot how to get an easy DIY firm reduction gears from 10 turns to 1 in such a tight space ?
    Last edited: Sep 22, 2016
  11. speedy

    speedy Well-Known Member

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  12. bruce stephen

    bruce stephen Hammer doesnt fix it, must be electrical

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    0 to 200 turns field settable. Very cool. Did you get a quote on these?
  13. speedy

    speedy Well-Known Member

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  14. speedy

    speedy Well-Known Member

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  15. Billel

    Billel Member

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    Amazing build, but unfortunately you shared the building process, and didn't share the programing process (how did you manage to make the Arduino comunicate with the VFD ?) which is the most important and complex part.
  16. amilivian

    amilivian New Member

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    congratulations, I'm going to get some ideas from your project