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DIY COMPACT 2 DOF 180º FOR VR

Discussion in 'DIY Motion Simulator Projects' started by janio, May 13, 2020.

  1. janio

    janio janio from brazil

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    developing my exclusive project for flying with hmd.
    components - 50mm x 50mm x 1.9mm square tube;
    - 2 dc 24v. wheelchair motors;
    -arduino uno;
    -2 bridge H bts 7960b;
    -2 sources of 20a.
    20200512_190003.jpg
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  2. Ads Master

    Ads Master

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  3. janio

    janio janio from brazil

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    20200524_133435.jpg 20200524_133926.jpg 20200524_154511.jpg
    • Like Like x 2
  4. janio

    janio janio from brazil

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    the speed of the chair motor was high, so I will add a sliding reduction box.
    Last edited: Aug 25, 2020
  5. janio

    janio janio from brazil

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    small sketch 20200527_094931.jpg
  6. janio

    janio janio from brazil

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    me building the motion rig. 20200531_154047.jpg 20200531_154144.jpg 20200531_154309.jpg 20200531_154425.jpg
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  7. janio

    janio janio from brazil

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    the welding of my motion rig.
    • Like Like x 3
  8. janio

    janio janio from brazil

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    the rpm reductions shown above were not strong enough after testing, so they will be replaced by stronger gears. 20200805_120110.jpg 20200805_120212.jpg 20200811_125012.jpg 20200811_125221.jpg 20200819_153209.jpg
  9. janio

    janio janio from brazil

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    - 2 motorcycle springs will be used to compensate for the weight when tilting the y-axis.
    - 4 retractable casters will be installed for small displacements. 20200831_123530.jpg 20200831_123704.jpg 20200831_123758.jpg 20200831_123826.jpg
  10. janio

    janio janio from brazil

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    arduino and h bridges ibt2 bts7960 mounted in an empty computer power supply box.
    missing to place the wires that connect to the motors. I installed a 12v power supply to power the fan.
    20200903_122253.jpg 20200903_122416.jpg 20200903_122501.jpg
  11. Dschadu

    Dschadu Member

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    Looks nice and tidy.
    But: You are going through the metal case with mains power. I don't know if the cable just runs through, but it looks like the fan is connected to it. You need to have double isolation (like heatshrink around the fan wires) or you have to connect the case to ground to prevent electrical hazard. Grounding also helps with EMI.
  12. janio

    janio janio from brazil

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    20200904_192607.jpg 20200904_192705.jpg 20200904_192816.jpg
    I chose to run the cable through the box just for aesthetic reasons, the fan does not go directly to the power cable, there is a compact 12volts source for 1 ampere for it. my rig is getting pretty, see photo.
    thanks for interacting.
  13. janio

    janio janio from brazil

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    My Motion Simulator:
    2DOF, DC motor, Arduino

    first test with simtools.
    • Like Like x 5
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  14. janio

    janio janio from brazil

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    I built a support for the touch rift. 20200922_100735.jpg 20200922_100716.jpg 20200922_100534.jpg
    • Like Like x 2
  15. janio

    janio janio from brazil

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    SPEED RATIO.
    I used 2800 rpm-180w motors - 7,5 amps.
    On the motor shaft, a 20 mm diameter pulley {20 x pi (3.1416) = 62.83 circumference},
    Attached by belt to a 120 mm pulley (120 x pi = 376.99 circ.), Then 376.99 / 62.836 = 6.00.
    Then the 2800 rpm was reduced to 6 time, dropping to 466 rpm.
    A 60mm pulley (60x pi = 188.49 circ.) Is attached to the 120mm pulley, therefore rotating at 466 rpm.
    The 60 mm pulley is connected by belt to a 190 mm pulley (190x pi = 596.90 circ), therefore 596.90 / 188.49 = 3.16
    Then the 466 rpm was reduced by 3.16 times, dropping to 147 rpm.
    147 rpm is the input speed for the gearbox whose speed ratio is 30: 1 (30 turns on the input shaft by 1 turn on the output shaft).
    The lifting arm of the structure coupled to the output shaft of the gearbox has a 180º (half-turn) path which makes use of 15 revolutions at the entrance.
    Being 147 rpm (60 seconds), 15 rpm is for 6.12 seconds. (60 / 147x15 = 6.12)
    The travel time of the platform tilt for each side is 3.6 seconds. If you want a faster platform, just reduce the pulley ratio to obtain a higher final rpm.
    However, there is a cost for this, since increasing the final speed requires more engine power, so you would probably need to increase the wattage of the engine.
    Last edited: Nov 21, 2020
  16. janio

    janio janio from brazil

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    my simulator is already working, but i must mention that i am not satisfied with the potentiomentres i am using, they are common like this photo. pot..jpg so I must exchange for these https://au.mouser.com/ProductDetail...j3Xg/E%2BT4uaGQMLkF/ZbX4q0Jou%2BC/VeFbkRN3Q== that are the ones that Rav2n87 is using in his project, which was advised by noorbeast.
    I also learned in another post (I do not remember the name of the member to refer to him), that the wires to the pots must be shielded cables, so as not to receive interference that causes some noise.
    See you.
    • Like Like x 1
  17. janio

    janio janio from brazil

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    20200925_150329.jpg today i added a metallic support for the tracker, necessary to use the motion compensation software (later i will test the virtual tracker with the flypt mover software), because my x axis rotates 90º to each side, so it is impossible to fly decently without this wonderful OVRMC software, for which we have much to thank Dschadu. 20200925_150329.jpg
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  18. tadek

    tadek Member

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    My Motion Simulator:
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    great project
    How it works under load
  19. janio

    janio janio from brazil

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    hi friend, the feeling on the slopes is great, but I'm still adjusting the plugin, I have some unwanted bumps, and I also couldn't get the ovrmc to work on my steam platform, so I need to fix it.
  20. ART FLY

    ART FLY Active Member Gold Contributor

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    My Motion Simulator:
    3DOF, DC motor, Arduino
    I am impressed. Great project & stylish too.
    Greetings from BAVARiA,
    ARTi
  21. janio

    janio janio from brazil

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    thanks friend, i will post some video after my hp reverb g2 gets here.