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

Question Motors reversed?

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by SplitCurve49315, Feb 18, 2022.

  1. SplitCurve49315

    SplitCurve49315 New Member

    Joined:
    Feb 17, 2022
    Messages:
    16
    Balance:
    59Coins
    Ratings:
    +4 / 0 / -0
    My Motion Simulator:
    2DOF
    Hi,

    I’m still in the somewhat early stages of my build. I will start a build thread shortly. I’ve been busy planing, wiring and testing my motors using two IBT-2 43A controllers and SMC.

    Everything seems to be working perfectly. The only issue is that each motor seems to move opposite the other. So when I chose sine, on motor 1, when the green line is at the top of the curve the arm is at the top. Motor 2 is reversed. Green line at the top of curve motor moves the arm down.

    Is this something I can fix in software? Or a wiring issue? I’ve quadruple checked my wiring and it is correct.

    Thank you!
    Matt
  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
    Messages:
    20,463
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    St Helens, Tasmania, Australia
    Balance:
    144,614Coins
    Ratings:
    +10,741 / 52 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    Try swapping the two motor wire connections over.
  3. SplitCurve49315

    SplitCurve49315 New Member

    Joined:
    Feb 17, 2022
    Messages:
    16
    Balance:
    59Coins
    Ratings:
    +4 / 0 / -0
    My Motion Simulator:
    2DOF
    So swapping the motor wires on the IBT-2 results in the arm swinging all the way up bringing the green line past my stop lines. bringing the arm back to center and switching the motor “on” again via SMC does the same. As long as it’s on it refuses to stay in the middle and completely ignore the blue line.

    Looking at my problem again I observed that both potentiometers control their respective green lines identically. Seeing as my motors are installed opposite (mirrored), it results in the pots being mirrored as well therefore moving the arms in opposite directions.

    I’m a bit stumped.
  4. Anthony atallah

    Anthony atallah Member

    Joined:
    Aug 14, 2021
    Messages:
    76
    Occupation:
    Mechanical Engineer
    Location:
    Lebanon
    Balance:
    113Coins
    Ratings:
    +40 / 0 / -0
    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino
    maybe you wired the 2 pots differently? check if your negative and positive wires are on the same side.
  5. SplitCurve49315

    SplitCurve49315 New Member

    Joined:
    Feb 17, 2022
    Messages:
    16
    Balance:
    59Coins
    Ratings:
    +4 / 0 / -0
    My Motion Simulator:
    2DOF
    The pots are both wired the same and function identically and correctly. My issue is that my motors are mirrored, therefore motor 1 moves one way but motor 2 moves the opposite way via SMC.

    Everything works great, just opposite one another. Is that a problem?? I have not dived into SimTools yet. Will I be able to configure the motors there?

    EDCFC833-B087-41AD-81C5-330E20C1E20E.jpeg B4ACDF6E-1D68-409D-9C10-E0A1D4561ABB.jpeg CBE1445B-938A-404E-AD3C-12DB9D9390AF.jpeg B5D87699-4173-478D-937B-6FDFA29FD6B0.jpeg F809908C-6295-4D76-9A24-95012A97CEC1.jpeg

    Attached Files:

  6. Anthony atallah

    Anthony atallah Member

    Joined:
    Aug 14, 2021
    Messages:
    76
    Occupation:
    Mechanical Engineer
    Location:
    Lebanon
    Balance:
    113Coins
    Ratings:
    +40 / 0 / -0
    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino
  7. Anthony atallah

    Anthony atallah Member

    Joined:
    Aug 14, 2021
    Messages:
    76
    Occupation:
    Mechanical Engineer
    Location:
    Lebanon
    Balance:
    113Coins
    Ratings:
    +40 / 0 / -0
    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino
    In know from the forum that if in smc3 you face this problem, you swap the ibt motor connections (not battery just motors)
    And later in simtools you could change the direction when assigning the axis and dof
  8. Anthony atallah

    Anthony atallah Member

    Joined:
    Aug 14, 2021
    Messages:
    76
    Occupation:
    Mechanical Engineer
    Location:
    Lebanon
    Balance:
    113Coins
    Ratings:
    +40 / 0 / -0
    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino
    Try getting the motor arm in your desired resting position (not up or down) then turn manually the pot till it reach the middle position on smc3 also.
    Then power the motor and see what happens
  9. SplitCurve49315

    SplitCurve49315 New Member

    Joined:
    Feb 17, 2022
    Messages:
    16
    Balance:
    59Coins
    Ratings:
    +4 / 0 / -0
    My Motion Simulator:
    2DOF
    Tomorrow I will try swapping pin 1 and pin 3 on my motor 2 potentiometer. Will this work?
  10. Anthony atallah

    Anthony atallah Member

    Joined:
    Aug 14, 2021
    Messages:
    76
    Occupation:
    Mechanical Engineer
    Location:
    Lebanon
    Balance:
    113Coins
    Ratings:
    +40 / 0 / -0
    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino
    I think it's the same as swapping the corresponding motor ibt2 connections. Try please what I told you in my last post before, if you can reach the pot's shaft. it's easier then we will see.
  11. SplitCurve49315

    SplitCurve49315 New Member

    Joined:
    Feb 17, 2022
    Messages:
    16
    Balance:
    59Coins
    Ratings:
    +4 / 0 / -0
    My Motion Simulator:
    2DOF
    Ok! I’ll try that first and let you know. But only tomorrow morning.
  12. SplitCurve49315

    SplitCurve49315 New Member

    Joined:
    Feb 17, 2022
    Messages:
    16
    Balance:
    59Coins
    Ratings:
    +4 / 0 / -0
    My Motion Simulator:
    2DOF
    I was reading through the the sim tools documentation this morning. Will this not reverse my motor arm direction? A135B795-BAE9-49E1-BA47-DCE332320851.jpeg
  13. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
    Messages:
    20,463
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    St Helens, Tasmania, Australia
    Balance:
    144,614Coins
    Ratings:
    +10,741 / 52 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    Checking the DIR box orange or not will determine which way and axis moves.
  14. SplitCurve49315

    SplitCurve49315 New Member

    Joined:
    Feb 17, 2022
    Messages:
    16
    Balance:
    59Coins
    Ratings:
    +4 / 0 / -0
    My Motion Simulator:
    2DOF
    So as long as my green line follows the blue line in SMC it shouldn’t matter if it moves opposite of the other motor because I will be able to sync them up in sim tools. Right?
    • Like Like x 1
    • Agree Agree x 1
  15. Gadget999

    Gadget999 Well-Known Member

    Joined:
    Dec 27, 2015
    Messages:
    1,886
    Location:
    London
    Balance:
    11,543Coins
    Ratings:
    +453 / 9 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino, 6DOF
    In smc3 one motor motor will go up and down, the other will go down and up

    As long as ot tracks correctly it does not matter

    Get simtools comnected to your game and start testing
  16. SplitCurve49315

    SplitCurve49315 New Member

    Joined:
    Feb 17, 2022
    Messages:
    16
    Balance:
    59Coins
    Ratings:
    +4 / 0 / -0
    My Motion Simulator:
    2DOF
    Awesome! I just didn’t want to move forward if I had to do some more fundamental setup changes as to wiring or motor placement. Thank you!