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6DOF Work in progress

Discussion in 'DIY Motion Simulator Projects' started by beng2k, Jul 26, 2017.

Page 3 of 3
  1. beng2k

    beng2k Member

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    My Motion Simulator:
    6DOF
    No I did not. Can you show on a picture where to cut as a see a few places that say that
    beng2k, Dec 21, 2018
    #41
  2. Thanos

    Thanos Building the Future one AC Servo at a time... or 6

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    My Motion Simulator:
    AC motor, Motion platform, 4DOF, 6DOF
    Thanos, Dec 21, 2018
    #42
  3. beng2k

    beng2k Member

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    My Motion Simulator:
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    So I did as directed by the video. I verified no continuity between the 8bit side and center pins. Still this is the result

    Position 0-49 3.5v
    @ 49% it changes to 2.3 volts very rapidly
    It then has somewhat fine output until position 64 then stays at 1.1v until I hit 100
    beng2k, Dec 21, 2018
    #43
  4. beng2k

    beng2k Member

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    6DOF
    Well I managed to get it to move. With me in it. Under my control! I setup the heave as DOF1 with heave at 50 and DOF2 as roll at 50 on all axis to test as I actually have no idea what I'm doing and trial by fire is kinda my way LOL



    All the actuators need to be better centered and some other small things but hell yes!

    Now some observations so far

    AMC doesn't seem to ever send 2.5v by my multimeter at positions 49 but sends close to 2.35 so I programmed the sabertooths to use that at input center.

    It's also PID 25/0/0, motor speed 30

    The actuator movement length is also only.about 50% of what it could be, how would I go about adjusting that.

    All in all I'm super stoked about it. But I'm now leaving my other half and I'm.not sure when I can work on it next until things are settled.
    • Like Like x 3
    beng2k, Dec 31, 2018
    #44
  5. Pierre Lalancette

    Pierre Lalancette Sir Lalancelot Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino, 6DOF
    That's so cool! It's moving so smooth.
    I have the same problem with actuator only moving about 50% of the full length they could. Either there is something to program in the Arduino program, or maybe add a potentiometer between the ground and 5v to change the range, I don't know. If you have a solution, please send it my way.
    "Leaving my other half", sound sad.
    Pierre Lalancette, Dec 31, 2018
    #45
  6. beng2k

    beng2k Member

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    Sad yes. Never easy but just isn’t working anymore.

    I’m wondering if it was something to do with PID or motor speed but I’ll look into next time.

    A little noisy due to the ball bearing guides and one arm is slightly binding but thank god it moves.

    Getting closer and closer
    • Like Like x 1
    beng2k, Dec 31, 2018
    #46
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