1. For downloading SimTools plugins you need a Download Package. Get it with virtual coins that you receive for forum activity or Buy Download Package - We have a zero Spam tolerance so read our forum rules first.

    Buy Now a Download Plan!
  2. Do not try to cheat our system and do not post an unnecessary amount of useless posts only to earn credits here. We have a zero spam tolerance policy and this will cause a ban of your user account. Otherwise we wish you a pleasant stay here! Read the forum rules
  3. We have a few rules which you need to read and accept before posting anything here! Following these rules will keep the forum clean and your stay pleasant. Do not follow these rules can lead to permanent exclusion from this website: Read the forum rules.
    Are you a company? Read our company rules

Question What is the best DC motor for 2DOF rig?

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by Ahmed Hasan, May 16, 2021.

  1. Ahmed Hasan

    Ahmed Hasan New Member

    Joined:
    May 10, 2021
    Messages:
    16
    Balance:
    81Coins
    Ratings:
    +8 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    Hello again, well, i've got my head around almost everything now, though i'm still bit confused about the DC motors.. i read almost all threads but nothing direct or specific so i'd like to know the following for my future 2DOF rig.
    the recommended specifications :

    * Wats
    * Volts
    * Amps
    * Torque
    * All important details so i know what to search for..

    _____* i am planning to use Arduino and MonsterMoto Driver ( or BTS7960 if i didn't find MM )

    thank you.
  2. Ads Master

    Ads Master

    Balance:
    Coins
    Ratings:
    +0 / 0 / -0
  3. Zed

    Zed VR Simming w/Reverb Gold Contributor

    Joined:
    Apr 4, 2017
    Messages:
    993
    Location:
    USA
    Balance:
    5,311Coins
    Ratings:
    +994 / 4 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    The MonsterMoto and other controllers/bridges have current limits so to some extent, that choice might be iterative as other aspects of your sim firm up. Same for motor choice and other design goals.

    That said, my 2dof uses the same bridge chips as the MMs and the motors I used (pgsaw crab pot worm gear motors) pull 20-30A max in general. But things to keep in mind are gentle movements are less demanding with lower peak currents and the sharp, hard, fast motions require higher currents. Torque requirements are going to depend a lot on geometry and travel.

    There are calculators that allow you to input your planned rig geometry and motor information that will give you more insight. The monkey see / monkey do routine worked well for me as I was building my own rig and dissecting other people’s rigs was really instructive and informative. As long as you stay close to other designs known to work, you should be good to just mimic what others did while you learn or to validate your own ideas.

    Best recommendation would be to spend time in the build threads seeing what others did. Unfortunately you will be most qualified to build less conventional designs after you get all the experience and insight from building your own first rig. Behind the gaming/simming facade, these things are really pretty complicated automated industrial controls and take a bit to wrap your head around.
    • Like Like x 1
    • Useful Useful x 1
  4. Historiker

    Historiker Dramamine Adict Staff Member Moderator Gold Contributor

    Joined:
    Dec 16, 2010
    Messages:
    2,017
    Occupation:
    Retired
    Location:
    Michigan USA
    Balance:
    10,070Coins
    Ratings:
    +1,962 / 14 / -1
    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 6DOF
    Bodine 42A3BEPM-E3 Hands down one of the most powerful 12v motors you can get.
    • 12V Permanent magnet motor, max 23A
    • Motor produces 1/4 HP, 310 inch-pounds of torque
    • Sealed and fanless with aluminum housing
    • Gearbox ratio 1:60 for shaft speed of 41 RPM
    • Fully reversible
    It is well worth the extra expense to get a Sabertooth 2x32 motor driver to put behind your Arduino.

    I used these for years on both my 3DoF and my 6DoF simpits until I upgraded to 220v AC servo drives (SFX100).
    • Useful Useful x 1
  5. Ahmed Hasan

    Ahmed Hasan New Member

    Joined:
    May 10, 2021
    Messages:
    16
    Balance:
    81Coins
    Ratings:
    +8 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    thank you very much buddy for all the info.. i learned more things, i just wish if you suggest me some motor name that by your opinion is best of 2DOF rig? my brain learns things by comparison with other types, pretty much more than just reading..

    thank you again.
  6. Ahmed Hasan

    Ahmed Hasan New Member

    Joined:
    May 10, 2021
    Messages:
    16
    Balance:
    81Coins
    Ratings:
    +8 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    thank you very much , man, that was helpful i appreciate it.. if you have any more advices about motors i'd be glad to hear.
  7. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
    Messages:
    16,781
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    St Helens, Tasmania, Australia
    Balance:
    121,948Coins
    Ratings:
    +9,633 / 47 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    • Useful Useful x 2
  8. Zed

    Zed VR Simming w/Reverb Gold Contributor

    Joined:
    Apr 4, 2017
    Messages:
    993
    Location:
    USA
    Balance:
    5,311Coins
    Ratings:
    +994 / 4 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    You’re quite welcome.

    As Noorbeast says, motor choice depends on sim design and geometry. For my rig I was able to use the pgsaw (Not the motor brand name - it’s the source. There’s a guy on ebay named pgsaw who sells them) 50:1 worm gear motors. Mine is a full-frame 2dof with rear-mounted motors. Details at my build link.

    There are more reasons it’s hard to make recommendations. Availability and sourcing of various parts can depend a lot on location and we also don’t know how much money you want to spend. Some build some very righteous rigs with high end parts and some build with wood and scrounged parts.

    2dof rigs are pretty simple but there are full-frame and seat movers and in general, full-frame rigs need more powerful motors since they are moving more mass. Similarly, if you are going to be racing you may want more powerful motors to better simulate bumps and curbs or whatever. Flying is generally smoother and slower and doesn’t need as powerful or fast motion. You want to have something in mind to know which way to go when you have choices.

    There’s a lot of experience lurking here but to get specific and good/useful help, you will need to work through more of the design process. The best thing would be to look through the build threads and see what fits for you and what doesn’t. That will really narrow down the questions and choices. A lot of the 2dof rigs use the pgsaw motors. They have their own issues and even come in at least two gear ratios, but they are very popular. Many use the MonsterMoto bridges to drive them.
    • Agree Agree x 1
    • Useful Useful x 1
  9. Ahmed Hasan

    Ahmed Hasan New Member

    Joined:
    May 10, 2021
    Messages:
    16
    Balance:
    81Coins
    Ratings:
    +8 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
  10. Ahmed Hasan

    Ahmed Hasan New Member

    Joined:
    May 10, 2021
    Messages:
    16
    Balance:
    81Coins
    Ratings:
    +8 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino

    thanks a lot, yes i want car sim. with above average motors. i have all tools and metal and everything that i need in home or near home, only the motors are difficult to find, the reason i wanted to know which motors people are using is not to get 1:1 similar but just to know for which similar specifications to search for, now i have clearer vision thanks to your replays.. so thanks again.
  11. Gadget999

    Gadget999 Well-Known Member

    Joined:
    Dec 27, 2015
    Messages:
    1,316
    Location:
    London
    Balance:
    8,843Coins
    Ratings:
    +293 / 8 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino, 6DOF
    A pair of wheelchair motors and gearboxes should do the job

    Try and get some that are at least 400w each if not more
    • Like Like x 1
  12. Ahmed Hasan

    Ahmed Hasan New Member

    Joined:
    May 10, 2021
    Messages:
    16
    Balance:
    81Coins
    Ratings:
    +8 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    oh thanks man, that's great tip, that would save me long order times and money .. i should find some of these here :D

    and thanks for the watt info, some said 70 or 100 is enough but idk i think that's too weak
  13. Gadget999

    Gadget999 Well-Known Member

    Joined:
    Dec 27, 2015
    Messages:
    1,316
    Location:
    London
    Balance:
    8,843Coins
    Ratings:
    +293 / 8 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino, 6DOF
    Buy the most powerful motors you can find. If you check my build thread i am using 100a motor drivers that can take 200a for a short time
    • Like Like x 1
  14. Ahmed Hasan

    Ahmed Hasan New Member

    Joined:
    May 10, 2021
    Messages:
    16
    Balance:
    81Coins
    Ratings:
    +8 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    wow, i wish i can find anything close to that,,!
    i am super motivated now as my RC build is going in the right direction :D will post about it in few minutes ..
  15. iLLuac4

    iLLuac4 Member

    Joined:
    Jun 19, 2019
    Messages:
    90
    Balance:
    660Coins
    Ratings:
    +35 / 0 / -0
    My Motion Simulator:
    2DOF
    I have used a little different motors and they are very strong. You can see here https://www.xsimulator.net/community/threads/simlab-gt2-to-2dof-conversion.13948/
    Aliexpress search: https://es.aliexpress.com/wholesale...0520210541&origin=y&SearchText=250w+24v+75rpm

    Some other users have also used them in their project and they were also satisfied.
    The mounting points are a little different. Those motors are not worm drive (I actually like that because there is less back-lash but needs to be energized to maintain the position (easy with simtool)). Also when designing the electronics I would recommend to fused the motors for protection since they are expensive (i did mine).
    Also pay attention to implement diode to avoid tripping the power supply (valid for any motor).
    I am using IBT2 motor drivers which ar ok-ish, but a little more expensive alternative as i hear is much better alternative to those drivers https://www.xsimulator.net/community/threads/ibt-2-motor-controllers.15765/
    IBT2 pwm drivers has a tendency to turn off under heavy load as you can also read in the forum in some posts.
    • Like Like x 1
  16. Ahmed Hasan

    Ahmed Hasan New Member

    Joined:
    May 10, 2021
    Messages:
    16
    Balance:
    81Coins
    Ratings:
    +8 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino

    thank you very much buddy, that was really helpful, appreciate it.
  17. Arta Yasa

    Arta Yasa Member

    Joined:
    Jan 27, 2021
    Messages:
    59
    Balance:
    197Coins
    Ratings:
    +5 / 0 / -0
    My Motion Simulator:
    2DOF
    Hi sir, for motor should be worm gear selft locking?? Or can use worm gewr non selft locking sir??
  18. adgun

    adgun Active Member

    Joined:
    Jan 28, 2008
    Messages:
    440
    Occupation:
    mechanic
    Location:
    Netherlands
    Balance:
    5,189Coins
    Ratings:
    +104 / 3 / -0
    I believe the bodine motors are a spurgear not self locking.
    If a wormgearbox is self locking or not depends on his ratio, its got all to do with the tooth angle insite the gearbox, from i 50 and above they become self locking
    • Friendly Friendly x 1
  19. Arta Yasa

    Arta Yasa Member

    Joined:
    Jan 27, 2021
    Messages:
    59
    Balance:
    197Coins
    Ratings:
    +5 / 0 / -0
    My Motion Simulator:
    2DOF
    Yes sir, that means I can use this worm gear dc motor that is not self-locking, right? because I'm afraid I'm going to break my bts7960 while maintaining the angle of the movement position, sir, because it's not self-locking. ok i will try it tomorrow. thanks again sir.
  20. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
    Messages:
    16,781
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    St Helens, Tasmania, Australia
    Balance:
    121,948Coins
    Ratings:
    +9,633 / 47 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    Just so you know 50:1s can't normally be back driven when they are new, but can under load once worn in, in my experience 60:1s can't be back driven even on a compact style rig like mine.