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Question 4DOF platform

Discussion in 'DIY Motion Simulator Projects' started by kalbasator, Feb 11, 2022.

  1. kalbasator

    kalbasator New Member

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    Hello everyone!
    I am starting a project to create a 4DOF platform.
    As I could, I drew an approximate layout in the sketch app.
    With the location of the front motors and fastening jet rods have not yet decided.
    Motors ordered Chinese 300 Watt 24V 1800 rpm, with a 50:1 gearbox.
    Hall sensors are also from China Arduino UNO R3 - 2pcs. But the situation with drivers for motors is not clear. Sabertooth is not delivered to our country. While I am studying the question of which ones are suitable from those available in China. Picked up a few options.
    I post screenshots below. Criticism and comments are welcome.

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  2. Ads Master

    Ads Master

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  3. kalbasator

    kalbasator New Member

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF
    According to the available drivers, one of the following:

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  4. kalbasator

    kalbasator New Member

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF
    I also found this driver. It is also in question whether it will fit, the price is almost like for a sabertooth))

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  5. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    When it comes to selecting drivers why not simplify and ensure existing code is available for the Uno: https://www.xsimulator.net/community/faq/arduino-code-for-use-with-various-hardware-and-simtools.31/

    Personally I would suggest selecting hardware compatible for the various variations of SMC3, given it has a companion app to provide easy and informative access to configuring settings.

    With respect to the design you could perhaps consider a pivoting V shaped bar between the top and bottom frames to prevent unwanted torsional rotation, but still allow traction loss style movement, albeit from a limit pivotal point. This a slightly different design but similar to what I mean in terms of visualizing the motion: https://www.xsimulator.net/community/threads/prilads-4dof-dc-motor-sim-rig.6157/
  6. kalbasator

    kalbasator New Member

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF
    For myself, so as not to lose:
    Platform 4DOF + TL (Traction Loss - lateral rotation / displacement of the rear axle) - what to shift - the entire platform or the pilot's seat?
    ***Features***
    Left and Right
    Back and forth
    Up and down
    TL Lateral shift/rear axle swivel Tilt angles 15* or 30*?
    ***Logics***
    Starting the platform (power is turned on, the platform goes to the working position (no data - moves to the rest position) )
    Before the start - the platform is in a rest position (motors without power? Or lower the lever to 0 *? - the force is removed from the motors)
    The map (game) has loaded - the platform enters the working position, receives data from the game...
    After the end of the race, the platform moves to a rest position.
    Protective emergency shutdown - what to turn off, under what conditions? (Power supply for potentiometers, power supply for motor drivers)?
    Manual emergency shutdown - what to disable? (Motor power, potentiometer power, motor driver power)? Grounding - what kind of grounding? (Boards, potentiometers must be isolated from the platform?) ***Software***
    SMC3utils - configuring motors
    SimTools - Receives data from the game (adjusted by Axis Limits...)
    Sketchup + package for building "crutches" - platform constructor
    Plugins for games.
  7. kalbasator

    kalbasator New Member

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    My Motion Simulator:
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    Thanks for your recommendations.
    I'll think about your design proposal. Below is a video of the platform in action. The video is not mine, so let me post a link to the author:

    https://2dof.ru/file/doc/4dof_ugly1.mp4
  8. kalbasator

    kalbasator New Member

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF
    • Like Like x 1
  9. kalbasator

    kalbasator New Member

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF
    So after a long time, it was decided to use the unnamed 100A driver.
    On the Internet, I found chip diagrams. Didn't understand anything about them.
    I logically figured out how the pins would be connected, but I could be wrong.
    Below are screenshots of the connection.
    Line.jpg

    Attached Files:

    • Like Like x 1
  10. kalbasator

    kalbasator New Member

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    Hello @RufusDufus !
    Can you tell me if this connection is correct? :think
  11. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    @RufusDufus was last active on Oct 17, 2021, so it my be a while before he has a chance to respond.

    SMC3 MODE1: Supports a PWM output pin plus two Motor Direction output pins.

    MODE2: Designed for H-Bridges that require direct drive of Highside and Lowside switch inputs. In this mode one switch is driven as a direction pin and the other with the PWM output however the PWM duty needs to be inverted whenever the motor changes direction with the direction pin.

    You need to figure out if your hardware is supported and if so which Mode yours is.
  12. kalbasator

    kalbasator New Member

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    My Motion Simulator:
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    The problem is that the manufacturer of this driver could not say anything (on Aliexpress ...:grin)
    Okay, when I get these drivers, I'll try at random

    Thank you very much for your support :thumbs
  13. Gadget999

    Gadget999 Well-Known Member

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    My Motion Simulator:
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    wait till you get the drivers - you will get it working quickly
  14. kalbasator

    kalbasator New Member

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF
    Thanks for your support and understanding.
    Tell me what mode in SMC3.ino did you use with a 100A drivers?
  15. itsumairu

    itsumairu Active Member

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    My Motion Simulator:
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    I really interested on the design.
    using 4 motor to get 4dof. very interesting! this is something I can do, with minimal budget of course.
    can't wait to see the final build.
    good luck!
  16. kalbasator

    kalbasator New Member

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    Hey @itsumairu! At the moment I am waiting for the gearmotors to arrive.
    Since I do not know their dimensions, I cannot proceed with the assembly and welding of the platform.
    As soon as I receive them, I will create a new theme in the showroom
    • Like Like x 1
  17. Gadget999

    Gadget999 Well-Known Member

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    iirc

    #define MODE1
  18. kalbasator

    kalbasator New Member

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    My Motion Simulator:
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    Thank you very much for your replies.
    Tell me, if a resistor is required for the driver and what denomination?
    Last edited by a moderator: Mar 2, 2022
  19. Gadget999

    Gadget999 Well-Known Member

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    My Motion Simulator:
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    no resitor required
  20. kalbasator

    kalbasator New Member

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    My Motion Simulator:
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    After a long wait, the ordered components gradually began to arrive. I received an arduino UNO, I ordered it on Aliexpress, the order came not the one that was in their photo.
  21. kalbasator

    kalbasator New Member

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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF
    The order was like this,
    1.JPG
    and received this
    ARD1.jpg ARD2.jpg