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Amicos 3DOF from 3DPrinter Parts

Discussion in 'DIY Motion Simulator Projects' started by Jon Amico, Jan 26, 2026.

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  1. Jon Amico

    Jon Amico Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino
    Help! Lol Anyone have the .STL file for this Hall sensor Mount that fits the 24v 250 watt Wheel Chair Motors?
    I Broke one of mine and lost the file in my laptop hard drive crash and I cant seem to find it anywhere on thingiverse or the 3D Printers section here..



    I could have sworn I found it here..

    [​IMG]


    [​IMG]
    Jon Amico, Feb 7, 2026 at 20:55
    #21
  2. Jon Amico

    Jon Amico Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino
    Found it.. (Attached). I made it 4mm Thick and I will print 100% infill! I did have a more recent back up of my hard drive.. It was just hard to locate in my mess of a place.. lol

    Attached Files:

    • Useful Useful x 1
    Last edited: Feb 7, 2026 at 23:49
    Jon Amico, Feb 7, 2026 at 23:29
    #22
  3. Jon Amico

    Jon Amico Member Gold Contributor

    Joined:
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    My Motion Simulator:
    3DOF, DC motor, Arduino
    Monitors arrived in 1 day... lol Thanks Amazon! I hate that I give them so much money but damn they are fast..

    But more money spent.. i was running monitor out to hdmi on the old Monitors but these have Monitor cable ins.. One is too short. Had to overnight a longer one for the 3rd monitor..

    Looks way better and will perform better no doubt..

    [​IMG]
    • Like Like x 1
    Jon Amico, Feb 8, 2026 at 04:29
    #23
  4. Jon Amico

    Jon Amico Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino
    Plugged in every thing and hit the power to the motors and I got vigorous back and forths on motor 2 again.. i tried messing with all the parameters but couldn't get it to stop.. Sooo I switched the positive and negative back to how they were originally, and now that motor just spins again..

    I got Motor 3 working and hooked it to the seat.. It shakes pretty good during transition.. is this normal for SMC3 and gets better in Simtools or do I need to keep screwing with the parameters in the SMC3Utilis v1.01?

    Jon Amico, Feb 9, 2026 at 00:43
    #24
  5. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    You need to sort SMC3 before messing with SimTools.

    I am not sure how you got the SMC3 values in the video.

    I would suggest trying Fpwm at 25 and expect Kp to be in the range of 250-500. These are the SMC3 setup steps:

    Follow the steps below to reduce the risk of damaging anything: https://www.xsimulator.net/communit...3dof-motor-driver-and-windows-utilities.4957/
    1. Disconnect the motor power supply
    2. Make sure Simtools is not running – we’re not ready for that yet!
    3. Wire up the Arduino (with SMC3 installed) to your H-Bridges and connect to your computer via USB
    4. Run the Windows SMC3 Utility software and make sure it communicates with the Arduino (There is no need to set baud rates, they are not configurable)
    5. Set the Kp, Ki, Kd, PWMmin, PWMmax, PWMrev to 0 for ALL motors (This will make sure the motors don’t move)
    6. Set Clip to 255 (you need to do this first) and Limit to 255 (This will give you plenty of margin if something goes wrong while setting up)
    7. Turn on the power to your motors – nothing should move at this stage!
    8. Set Kp to about 400
    9. Now slowly, increase PWMmax… at some point the motor should start to move. When it does check the “Green” feedback line is moving toward the “Blue” target position.
      • If it is then that motor and feedback is wired correctly - proceed to test other motors.
      • If it is moving away turn off motor power immediately (or quickly reduce PWMmax again). In this case you need to either reverse the wires to the motor being tested –OR– reverse the +5V and GND wires to your feedback pot for the motor being tested (do not do both). Restart the test from the beginning.
    10. Do the above for each motor
    noorbeast, Feb 9, 2026 at 04:47
    #25
  6. Jon Amico

    Jon Amico Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino
    Lol Yeah those settings were me just messing around trying to get the jittering out.. Zero All.. Lots of it was slop in my belt or Pot mount.. They were weak and I printed new solid 4mm. It helped a little but was desperately messing with settings..

    After some chats with Gpt I ended up with this.

    [​IMG]

    The A and B.motors are working ok. But B still just spins till Max and cuts off.. I tried Switching B with its Pot to The C spot and worked OK and the C Moter does the same in B spot.. Im leaving them in those spots now.. I then tried switching the Motor controllers to see if there was a problem there... Same issues.. Im still in Mode 1 as nothing worked in mode 2..

    That damn B Spot!
    Jon Amico, Feb 9, 2026 at 05:32
    #26
  7. Jon Amico

    Jon Amico Member Gold Contributor

    Joined:
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    My Motion Simulator:
    3DOF, DC motor, Arduino
    Oh and the B motor just moves no mater if its in Monitor or any other of the Movement Out Modes. Moves fast to Max limit after giving it power or moving the green line to center and clicking ON..
    Jon Amico, Feb 9, 2026 at 05:39
    #27
  8. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    I can't really read the settings in that image, but the graph at least looks closer.

    With B are you sure the pot is properly centered when the rig is level and at rest? You can disconnect power to the motor and check by observing the graph.
    noorbeast, Feb 9, 2026 at 06:19
    #28
  9. Jon Amico

    Jon Amico Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino
    When there is no power 24v I can spin the motor shaft / pot and I can get the green line centered. The arms are not connected to the cockpit at the moment. When I turn on the 24v is spins way faster than the other two till it hits max and stops.

    It shouldn't be getting any power. I have it on Monitor.. But the same one Sine, Movement or whatever..
    Jon Amico, Feb 9, 2026 at 14:31
    #29
  10. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    Check the pot is not 180 degrees out.

    If not I suspect a hardware fault so swap parts out to narrow down where.
    noorbeast, Feb 9, 2026 at 22:17
    #30
  11. Jon Amico

    Jon Amico Member Gold Contributor

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    My Motion Simulator:
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    That would have been awesome if the Pot was only off 180.. I tried the green line centerd and then again 180 centered again.. Same deal.

    I swapped the motor controllers and same deal.. So its not the controller unless both of them dont like controlling 2 motors?!

    I unhooked the argentina wires to that motor.. the motor won't spin.. if I hook the A1 digital wire back I can see the green line again, Hook up pin 4 Nothing, 4 and 5 Spin..

    I tried reversing the motor in the SMC3 code.. maybe the motor spin the other way, but still moves till Max..

    Maybe I need one more controller??
    Jon Amico, Feb 10, 2026 at 14:53
    #31
  12. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    Does the pot on that motor run correctly if swapped to a different control board? Or alternatively does a different pot behave the same way with that controller?
    noorbeast, Feb 10, 2026 at 15:01
    #32
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