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

Slowest 2DOF build ...ever.

Discussion in 'DIY Motion Simulator Projects' started by Goatboy, Feb 26, 2016.

  1. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
    Messages:
    20,554
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    St Helens, Tasmania, Australia
    Balance:
    145,142Coins
    Ratings:
    +10,779 / 52 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    Disconnects can be a range of things, a failing PSU, usb cables, interference and possibly influenced by settings.

    USB cables are easy to swap out, a battery could help identify if a PSU is the issue, using shielded wires and not bundling with power cables helps.
    • Agree Agree x 1
  2. Goatboy

    Goatboy Member

    Joined:
    Jul 4, 2014
    Messages:
    82
    Location:
    New South Wales, Australia
    Balance:
    386Coins
    Ratings:
    +43 / 2 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    I've got shielded usb cables , got plenty of distance between feedback and power wires and also short runs on the power wires.

    Time to swap out the power source and start there.

    Thanks for the ideas @noorbeast
    • Like Like x 1
  3. rattler

    rattler

    Balance:
    Coins
    Ratings:
    +0 / 0 / -0
    Try shortening levers to 45mm ctc. A longer lever might give you speed but that means the motor has to work harder to pull the sim around.
  4. Nick Moxley

    Nick Moxley Well-Known Member

    Joined:
    Dec 13, 2013
    Messages:
    2,779
    Occupation:
    Owner/Operator- Moxleys Rantals
    Location:
    Winnipeg Manitoba Canada
    Balance:
    17,054Coins
    Ratings:
    +2,504 / 30 / -2
    My Motion Simulator:
    2DOF, 3DOF, DC motor, JRK
    Do you have all the axis properly reversed ? like sway and roll ? Sounds like you have 1 side that needs to be reversed, Sway requires one motor to drop and one to raise. Im thinking its trying to raise it but it hasn't been inverted and physically cant move the way you want due to settings.

    Post all your setting's please, Axis assignments, PID, Motor tab and Tuning center please.
    • Agree Agree x 1
  5. Goatboy

    Goatboy Member

    Joined:
    Jul 4, 2014
    Messages:
    82
    Location:
    New South Wales, Australia
    Balance:
    386Coins
    Ratings:
    +43 / 2 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    For example, it does it when I only have Sway enabled, the axis are correct otherwise I would be getting surge/pitch effect at the seat and not sway. And it also returns errors whilst reversed incorrectly, so if the seat swaying the incorrect way or moving forward back in a surge/pitch motion.

    I'll post a video and hopefully that gives you all the details you require :)

  6. RaceRay

    RaceRay Administrator Staff Member SimAxe Beta Tester

    Joined:
    Nov 8, 2006
    Messages:
    4,656
    Occupation:
    Self-employed | Web and application development
    Location:
    Hamburg, Germany
    Balance:
    23,840Coins
    Ratings:
    +1,968 / 13 / -0
    My Motion Simulator:
    2DOF, DC motor, SimAxe, SimforceGT
    @Goatboy Its lowered to 5 posts now.
  7. rattler

    rattler

    Balance:
    Coins
    Ratings:
    +0 / 0 / -0
    Raise PID period to 20ms,
    Integral to 10000
    Drop max duty cycle and max accell to 500
    Set max current to 0 (unlimited)
    See how that goes @Goatboy
    • Like Like x 1
    • Agree Agree x 1
  8. Goatboy

    Goatboy Member

    Joined:
    Jul 4, 2014
    Messages:
    82
    Location:
    New South Wales, Australia
    Balance:
    386Coins
    Ratings:
    +43 / 2 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    Same results with those settings :(
  9. Nick Moxley

    Nick Moxley Well-Known Member

    Joined:
    Dec 13, 2013
    Messages:
    2,779
    Occupation:
    Owner/Operator- Moxleys Rantals
    Location:
    Winnipeg Manitoba Canada
    Balance:
    17,054Coins
    Ratings:
    +2,504 / 30 / -2
    My Motion Simulator:
    2DOF, 3DOF, DC motor, JRK
    Axis 1 appears to be "Double reversed" In the utility feedback tab its been checked as reversed, also in the Axis assignments its also been reversed.....
  10. Goatboy

    Goatboy Member

    Joined:
    Jul 4, 2014
    Messages:
    82
    Location:
    New South Wales, Australia
    Balance:
    386Coins
    Ratings:
    +43 / 2 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    It's reversed in the utility because I turned the shaft around in one motor, the jrk utility selects this as default when I "learn" the feedback range, changes to this cause the lever to smash in to the MDF whilst turning the wrong way...

    As for the reverse in the Axis assignments, it makes no difference as I explained before. You can reverse the axis and still get the same results when it comes to input disconnect errors. Regardless of what DOF effect is hitting the seat and if it's moving in the correct direction, there will be input disconnect errors flowing in.
    Last edited: Mar 25, 2016
  11. Goatboy

    Goatboy Member

    Joined:
    Jul 4, 2014
    Messages:
    82
    Location:
    New South Wales, Australia
    Balance:
    386Coins
    Ratings:
    +43 / 2 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    Another video, but this time I'm cycling through the dir changes in the axis assignment and the errors occur no matter which combination used.

    Last edited: Mar 25, 2016
  12. Nick Moxley

    Nick Moxley Well-Known Member

    Joined:
    Dec 13, 2013
    Messages:
    2,779
    Occupation:
    Owner/Operator- Moxleys Rantals
    Location:
    Winnipeg Manitoba Canada
    Balance:
    17,054Coins
    Ratings:
    +2,504 / 30 / -2
    My Motion Simulator:
    2DOF, 3DOF, DC motor, JRK
    Something is seriously wrong here.....Have you tested roll ? please do so. After that, Please test a Force that does not require reversing of one motor to perform its motion. Use surge or heave.
  13. Goatboy

    Goatboy Member

    Joined:
    Jul 4, 2014
    Messages:
    82
    Location:
    New South Wales, Australia
    Balance:
    386Coins
    Ratings:
    +43 / 2 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    Roll is the same , so is pitch and the same with surge. I noticed with the roll/surge effect both controllers report input disconnect errors whilst pulling the levers down , but not whilst pushing them up. In the second video I posted you may notice that at the 40second mark when I set both axis to reverse, this emulates roll/surge.
  14. Nick Moxley

    Nick Moxley Well-Known Member

    Joined:
    Dec 13, 2013
    Messages:
    2,779
    Occupation:
    Owner/Operator- Moxleys Rantals
    Location:
    Winnipeg Manitoba Canada
    Balance:
    17,054Coins
    Ratings:
    +2,504 / 30 / -2
    My Motion Simulator:
    2DOF, 3DOF, DC motor, JRK
    Very strange you get the errors when both are going in the same direction as well. Man im stumped, Sorry bud. Ive messaged Robbie and lets hope he can spot something in the video or setting's.
  15. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
    Messages:
    20,554
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    St Helens, Tasmania, Australia
    Balance:
    145,142Coins
    Ratings:
    +10,779 / 52 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
  16. Nick Moxley

    Nick Moxley Well-Known Member

    Joined:
    Dec 13, 2013
    Messages:
    2,779
    Occupation:
    Owner/Operator- Moxleys Rantals
    Location:
    Winnipeg Manitoba Canada
    Balance:
    17,054Coins
    Ratings:
    +2,504 / 30 / -2
    My Motion Simulator:
    2DOF, 3DOF, DC motor, JRK
    Also just to confirm, Both motor's will work by themselves no problem ?
  17. Goatboy

    Goatboy Member

    Joined:
    Jul 4, 2014
    Messages:
    82
    Location:
    New South Wales, Australia
    Balance:
    386Coins
    Ratings:
    +43 / 2 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    I'm using modded HP DPS-600PB server PSU's

    DSC_7716[1].JPG

    Those are XT60 connectors soldered directly to the board with short runs of wire.

    DSC_7774[1].JPG
  18. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
    Messages:
    20,554
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    St Helens, Tasmania, Australia
    Balance:
    145,142Coins
    Ratings:
    +10,779 / 52 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    My mistake, that is OK, I can see now what looked like a bridging wire is the pin connector wires.
  19. Goatboy

    Goatboy Member

    Joined:
    Jul 4, 2014
    Messages:
    82
    Location:
    New South Wales, Australia
    Balance:
    386Coins
    Ratings:
    +43 / 2 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    Just to show the rig does work even with errors. It was pretty early in the morning (3am) so I can't recall how aggressive the axis setup was for this video but I'd say pretty weak when it comes to sway/surge.

  20. Nick Moxley

    Nick Moxley Well-Known Member

    Joined:
    Dec 13, 2013
    Messages:
    2,779
    Occupation:
    Owner/Operator- Moxleys Rantals
    Location:
    Winnipeg Manitoba Canada
    Balance:
    17,054Coins
    Ratings:
    +2,504 / 30 / -2
    My Motion Simulator:
    2DOF, 3DOF, DC motor, JRK
    sway looks backwards ? no ? Pause the game In Mid corner with a bunch of steering added and at speed, then Increase the Sway slider in the Editor, That willl change the Data value LIVE and make it really easy to distinguish what direction a force is going.