1. Do not share user accounts! Any account that is shared by another person will be blocked and closed. This means: we will close not only the account that is shared, but also the main account of the user who uses another person's account. We have the ability to detect account sharing, so please do not try to cheat the system. This action will take place on 04/18/2023. Read all forum rules.
    Dismiss Notice
  2. 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!
  3. 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
  4. 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
Shared accounts will be removed Plugin Downloads Zero spam policy Forum Rules

Question 3rd motor connection?

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by Joonas Temonen, Dec 28, 2025.

  1. Joonas Temonen

    Joonas Temonen Member

    Joined:
    Jan 3, 2025
    Messages:
    38
    Balance:
    97Coins
    Ratings:
    +7 / 0 / -0
    My Motion Simulator:
    2DOF
    Hi!
    I have searched the wiring diagram for 3 motors but havent found it.
    I would like to add 3rd motor and H-Bridge ibt-2 to my sim witch has 2 motors already. Thinking of adding traction loss to my sim.
    Could someone link the photos of connections.
    Thanks you!
    Joonas Temonen, Dec 28, 2025
    #1
  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
    Messages:
    22,045
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    Tasmania, Australia
    Balance:
    153,866Coins
    Ratings:
    +11,154 / 57 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    noorbeast, Dec 28, 2025
    #2
  3. Joonas Temonen

    Joonas Temonen Member

    Joined:
    Jan 3, 2025
    Messages:
    38
    Balance:
    97Coins
    Ratings:
    +7 / 0 / -0
    My Motion Simulator:
    2DOF
    Joonas Temonen, Feb 11, 2026 at 10:29
    #3
  4. Joonas Temonen

    Joonas Temonen Member

    Joined:
    Jan 3, 2025
    Messages:
    38
    Balance:
    97Coins
    Ratings:
    +7 / 0 / -0
    My Motion Simulator:
    2DOF

    Here is video about this
    Joonas Temonen, Feb 11, 2026 at 10:33
    #4
  5. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
    Messages:
    22,045
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    Tasmania, Australia
    Balance:
    153,866Coins
    Ratings:
    +11,154 / 57 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    The tracking is poor so try setting Steps to 1, Fpwm to 25, Kp to 400, PWMmax to 200, Max Limits to 50 then rerun and post the Sine test.
    noorbeast, Feb 11, 2026 at 11:00
    #5
  6. Joonas Temonen

    Joonas Temonen Member

    Joined:
    Jan 3, 2025
    Messages:
    38
    Balance:
    97Coins
    Ratings:
    +7 / 0 / -0
    My Motion Simulator:
    2DOF
    I will try that and be back with video. I cant change the Fpwm To 25. Motors 1 and 2 are on 25khz but motor 3 has only that 31khz and if i remember right, 4khz. Potentiometers are all the same on motors.
    Joonas Temonen, Feb 11, 2026 at 11:13
    #6
  7. Joonas Temonen

    Joonas Temonen Member

    Joined:
    Jan 3, 2025
    Messages:
    38
    Balance:
    97Coins
    Ratings:
    +7 / 0 / -0
    My Motion Simulator:
    2DOF
    Joonas Temonen, Feb 11, 2026 at 11:38
    #7
  8. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
    Messages:
    22,045
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    Tasmania, Australia
    Balance:
    153,866Coins
    Ratings:
    +11,154 / 57 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    You can tweak from there but at least it looks like the tracking is in the ballpark.

    I can't tell from the video why the tracking seemingly flat-lines near the end.
    noorbeast, Feb 11, 2026 at 11:52
    #8
  9. Joonas Temonen

    Joonas Temonen Member

    Joined:
    Jan 3, 2025
    Messages:
    38
    Balance:
    97Coins
    Ratings:
    +7 / 0 / -0
    My Motion Simulator:
    2DOF
    Thats when the motor stops. The line stops when it shut Off the motor.
    Should I use 2 arduinos? I just read from here that motor 3 wont work on smc because of the Fpwm cant be setin To 25khz.
    Joonas Temonen, Feb 11, 2026 at 11:56
    #9
  10. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
    Messages:
    22,045
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    Tasmania, Australia
    Balance:
    153,866Coins
    Ratings:
    +11,154 / 57 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    I think another Arduino would be the easiest fix.
    noorbeast, Feb 11, 2026 at 11:58
    #10
  11. Joonas Temonen

    Joonas Temonen Member

    Joined:
    Jan 3, 2025
    Messages:
    38
    Balance:
    97Coins
    Ratings:
    +7 / 0 / -0
    My Motion Simulator:
    2DOF
    Okay. Will try that too. Thanks!
    Joonas Temonen, Feb 11, 2026 at 11:59
    #11