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Looking into a brushless setup

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by matthew loomis, Aug 9, 2017.

  1. matthew loomis

    matthew loomis Member

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    My Motion Simulator:
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    Looking into motors and such started thinking about brushless. Have some experience from my rc hobby. Brushless has been a revolution everywhere else so I looked at this
    [​IMG]
    And maybe control with this or similar
    [​IMG]
    Any reason this would be extra hard?
  2. Ads Master

    Ads Master

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  3. Alexey

    Alexey Well-Known Member

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    My Motion Simulator:
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    You need to source reversible motor controllers. Also I'm not sure if anyone has written code to talk to the motor controller.
    BLDC motors are pretty much stepper motors with fewer steps, as far as I know there is not any mature control package for steppers/BLDC.
  4. matthew loomis

    matthew loomis Member

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    Those are fully reverseable rc controllers and use servo code to operate. Lots of servo controlled ard projects
  5. ferslash

    ferslash Active Member

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    if the motor you selected would do the job, what is the price of the motor and the driver? (if it is in your info sorry i did not see it)
    :popcorn
  6. matthew loomis

    matthew loomis Member

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    The rc speed controller runs about $120 so same range as a sabertooth. Having trouble on pricing motors but around the 100-200 range so comparable there as well.
    I want to do a 3dof so I need pretty good torque numbers
  7. Alexey

    Alexey Well-Known Member

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    Sounds pretty straight forward then. Couple that with a gearbox and you should have a pretty strong setup.
  8. matthew loomis

    matthew loomis Member

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  9. matthew loomis

    matthew loomis Member

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    My Motion Simulator:
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    Power scooter motors are 4nm for $125
  10. SeatTime

    SeatTime Well-Known Member

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    My Motion Simulator:
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    I've seen a few DC brushless projects pop up then - nothing heard ... Just takes someone to put in the time/money.
  11. ferslash

    ferslash Active Member

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    how many motors does talon driver actually controls?

    if they countrol only one, maybe in terms of money the scooters motors are a better option... the interesting thing about the other motors should be the size, maybe they are cheap to send on the mail..

    fer
  12. DEADBEEF

    DEADBEEF New Member

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    ODrive may be worth a look for this sort of thing once they've matured a bit.

    They're aiming for an open source BLDC controller board which can controll two motors, handle encoder feedback, and work up to 100A peak current. If it all comes off they sound perfect for controlling motion sims.
  13. matthew loomis

    matthew loomis Member

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    I have found some bldc stuff that will take pwm input. It's all expensive. I'm worried about speed (latency) using rc servo controllers. Brushless Electric moped motors look close, and cheep. Trying to find solid torque required numbers is tough, different for each design. 1-3 hp motors seem to do the trick, getting that at 24v is tough. 48 not so tough
  14. auryza

    auryza Active Member

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    Hello ,
    I'm working on stepper motion control, things looks promising . ;)
    With this small 8Nm motor, and what you see in picture i can lift around 20 kg.

    20883991_343712912731967_2013787770_o.jpg

    And some video:

  15. matthew loomis

    matthew loomis Member

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    I've been looking at hobby stuff. These motors output over 3nm for under $100
    [​IMG]
  16. pmvcda

    pmvcda aka FlyPT

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    My Motion Simulator:
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    Hi,

    I made a topic about my 6DOF build with brushless motors.
    I can share what I'm using:


    Motor:
    Nanotec DB59C024035-A (brushless).
    Bought at Farnell (http://pt.farnell.com/nanotec/db59c024035-a/bldc-motor-24vdc-4500rpm/dp/2507576
    Specs: http://en.nanotec.com/fileadmin/files/Datenblaetter/BLDC/DB59/DB59C024035-A.pdf
    Right now they are around 99€ each one.
    They are rated 3500rpm and 0,6Nm (4500 rpm 1,8Nm peak)
    For a SFU1605 (ball screw), thats 16mm diameter with 5mm travel on each turn we can have for rated values:
    3500rpm => 290mm/s of travel
    0,6Nm => 372N = 38Kg of lift


    Motor drivers (one for each motor):
    ACT Motor BLDC-8015A
    Bought on ebay (http://www.ebay.co.uk/itm/EU-UK-Brushless-DC-Motor-Driver-BLDC-8015A-18-80V-Nema17-to-Nema23-Wantai-/282017543495?hash=item41a98e3547:g:56oAAOSwubRXHvie).
    Specs: http://www.wantmotor.com/product/8015a.html
    They cost around 40€ each.


    This with an Arduino, works really well and we can go up to 6 motors with one Arduino.
    My schematic:
    Electronics2.jpg
    • Like Like x 2
    Last edited: Aug 31, 2017
  17. pmvcda

    pmvcda aka FlyPT

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    My Motion Simulator:
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    Missed one image (can't edit the above post, gives error)
    Electronics1.jpg
    • Like Like x 1
  18. Zennix

    Zennix New Member Gold Contributor

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    Hi,
    I'm new in this business. Thinking in the same direction using cheap brushless motors and drivers.
    Some time ago, I build quadrocopters with brushless motors that can change the direction of the propellers to fly upside down.
    I remember a project where somebody has written a firmware for several ESC (brushless motor drivers).
    Sorry I'm not allowed to post the link. Just search for Simonk.
    This software is able to turn the motor in the other direction. The input for the ESCs is PWM.
    In the list you will find the supported drivers and how to flash that.

    Greetings / Zennix