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$450 Mige Direct Drive Wheel using MMOS and AASD

Discussion in 'DIY peripherals' started by Peacemaker105, May 6, 2020.

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  1. Peacemaker105

    Peacemaker105 Active Member Gold Contributor

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    Oh mate, you don't mess around do you @Thanos haha. Hell yeah! The pin header spacing should all be the same though, yeah?
    • Like Like x 1
    Peacemaker105, May 8, 2020
    #21
  2. Thanos

    Thanos Building the Future one AC Servo at a time... or 6

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    The Core407v board has different pinout from Discovery board... Its just hard to find discovery boards anymore.

    Plus the core407v is more compact! It will be easier to design 3D printed enclosure for it.
    • Informative Informative x 1
    Last edited: May 8, 2020
    Thanos, May 8, 2020
    #22
  3. Peacemaker105

    Peacemaker105 Active Member Gold Contributor

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    That would be just my luck :(
    There's hundreds of discovery boards available from element14, rsoline, mouser etc. (STM32F407G-DISC1) yes a tiny bit bigger but because it has ST-link programmer built in.
    Peacemaker105, May 8, 2020
    #23
  4. wannabeaflyer2

    wannabeaflyer2 Well-Known Member

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    @Peacemaker105 Oh Oh i Think thats the one i have as well ....Bugger :-( oh well still game on so another E-bay hit coming up

    Attached Files:

    • Like Like x 1
    Last edited: May 8, 2020
    wannabeaflyer2, May 8, 2020
    #24
  5. Thanos

    Thanos Building the Future one AC Servo at a time... or 6

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    Well, at least you can still use the ST-Link programmer on the Discovery boards you have to program the firmware into the Core407v...
    https://www.waveshare.com/core407v.htm

    No need to buy extra programmer...
    • Funny Funny x 1
    Thanos, May 8, 2020
    #25
  6. Peacemaker105

    Peacemaker105 Active Member Gold Contributor

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    @Thanos I see you've worked in retail before! Nice sales pitch haha. Funny thing is i actually ordered an st-link anyway because i didn't know this at the time lol

    @wannabeaflyer2 Nice DD wheel production line you got going on there, it does look a little incomplete.. :p
    • Funny Funny x 1
    Peacemaker105, May 9, 2020
    #26
  7. Gadget999

    Gadget999 Well-Known Member

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    Gadget999, May 10, 2020
    #27
  8. Gadget999

    Gadget999 Well-Known Member

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    Gadget999, May 10, 2020
    #28
  9. OZHEAT

    OZHEAT Active Member

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    Good to see someone else that has used different servo driver despite what majority of people think that granite's simucube is the ONLY driver that can be used.
    I said long ago that granite are laughing their arse off because of all the sim people think that it only works with their "special" driver. The only reason that they use <50v is because their driver cant handle 310v(mosfets vs IGBTs.

    Peacemaker you will probably need to tweek a few timings to get rid of the jitter from pwm input.
    • Agree Agree x 1
    OZHEAT, May 11, 2020
    #29
  10. thefost

    thefost Member

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    Great work @Peacemaker105 ! Really excited to see how this project turns out and will be keeping a close eye on this thread. I'd offer to help with the custom PCB, but looks like @Thanos has you covered :D
    • Like Like x 2
    thefost, May 11, 2020
    #30
  11. Thanos

    Thanos Building the Future one AC Servo at a time... or 6

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    Thanos, May 11, 2020
    #31
  12. Gadget999

    Gadget999 Well-Known Member

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    can you explain - would it be suitable as a 6dof motor
    Gadget999, May 11, 2020
    #32
  13. wannabeaflyer2

    wannabeaflyer2 Well-Known Member

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    wannabeaflyer2, May 11, 2020
    #33
  14. Thanos

    Thanos Building the Future one AC Servo at a time... or 6

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    The link had only the motor, without matched driver. Never buy them separate, it will be impossible to find matched servo drive and if you do, you will have to build the encoder wiring to match and find the correct parameters of the motor model and calibration information, which from my experience, its not easy task and its not worth it, to try save a few dollars.

    Thanks
    Thanos
    • Informative Informative x 2
    Last edited: May 11, 2020
    Thanos, May 11, 2020
    #34
  15. Thanos

    Thanos Building the Future one AC Servo at a time... or 6

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    • Informative Informative x 2
    Last edited: May 11, 2020
    Thanos, May 11, 2020
    #35
  16. Peacemaker105

    Peacemaker105 Active Member Gold Contributor

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    Mige don't use AASD drivers so very possible the pinouts are different.. Not to mention a 130st (130mm flanged motor) is way too big for a 6dof unless you're building something epicly large. 80-90st is what you want.
    • Agree Agree x 1
    • Informative Informative x 1
    Peacemaker105, May 11, 2020
    #36
  17. wannabeaflyer2

    wannabeaflyer2 Well-Known Member

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    Cheers @Thanos , The wave share version it is then , Motor driver Combo Ordered so Here we go again .. Thanks @Peacemaker105 for increasing the size my DD FFB production line LOL .. ( Note to self ....Must sell off this Things to pay for newer Things " :)
    • Funny Funny x 2
    wannabeaflyer2, May 11, 2020
    #37
  18. Peacemaker105

    Peacemaker105 Active Member Gold Contributor

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    Nice!! well hopefully between the few of us and the help of thanos we can fine tune this baby to oblivion :)
    • Like Like x 2
    • Agree Agree x 1
    Peacemaker105, May 12, 2020
    #38
  19. Wilbo

    Wilbo New Member

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    Great work so far pal....one question...How easy would it be to fit a SinCos encoder to the aasd? As in would it read it or would modifications be necessary?
    Wilbo, May 13, 2020
    #39
  20. Peacemaker105

    Peacemaker105 Active Member Gold Contributor

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    Hey mate, it won't work. From what i've read the maximum Encoder to work with MMOS is ~16,000ppr due to the 16.8khz rate. So the 10,000ppr (40,000cpr) encoder will be the highest readily available encoder to work before you would have to upgrade to Granity simucube setup. I've got a 40,000cpr encoder on the way to see how that fairs.

    I have tried changing the filtering (PN188) to "1" and it made a MASSIVE difference to road feel like bumps and curbs etc but it also increses the high frequency noise felt in the motor. I'm hoping the higher resolution encoder will allow me to find a better balance between this motor noise while keeping the detail felt in the road. Unless someone has another way to filter out this noise? perhaps using the DAC like thanos mentioned will help with this also.

    Unfortunately i have been busy repairing my rig and just life in general these past days so haven't had much time to play with it more. Hoping on my next break i will have more time to mess around with settings etc.
    • Agree Agree x 1
    Peacemaker105, May 14, 2020
    #40
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