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FlyPT set up with DC Motor and Double BTS7960 drive

Discussion in 'DIY Motion Simulator Projects' started by Flymen, Apr 13, 2023.

  1. Flymen

    Flymen Flymen Gold Contributor

    Joined:
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    Montreal, Canada
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    My Motion Simulator:
    DC motor, 6DOF
    Hello everyone ,
    I am on my second assembly with the FLyPT set up (ESP32) activated by opto and relays to control the output signal , but this time, I control the Double BTS7960 drive with 2-pole Magmotor motors and it works quite well.
    ESP32 module accepts feedback from 500 p/r encoders and does 'nt seem to jump step with two motors on ESP32 module.
    However, I have two problems now :
    1-Dc motors make Harmonic noise (see video)
    2- When the actuators are moving, I have small vibrations or ripples in my signal to the motor , with some filters and lower PID it helps but not enough. The best frequency on Esp32 Sketch found is: #define PWM_FREQUENCY 5000 because higher or lower , the motor makes more noise. ( see video )
    Thanks for your help !!
    @pmvcda
    Vibration from PWM signal - YouTube
    Vibration from PWM signal ? - YouTube
    Last edited: Apr 21, 2023
    Flymen, Apr 13, 2023
    #1
  2. Flymen

    Flymen Flymen Gold Contributor

    Joined:
    May 19, 2018
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    Location:
    Montreal, Canada
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    My Motion Simulator:
    DC motor, 6DOF
    Hi ,
    This video is a good exemple for problem with harmonic sound from DC motor .
    Control Large Gearmotors with PWM & Arduino - YouTube .

    DC Drive with one direction input and one PWM control ....Cytron 13 A DC MD10C .
    This drive seems good .... with the ESp32 driver from FlyPt Sketch , I don't need relay and opto for this drive and maybe less problem of harmonic and vibration from my output signal , but more expensive like 50-75 $can instead of 4$can for the BTS7960 .. Mmmm I'm going to buy one to see the difference
    Pilote moteur Cytron 13 A DC MD10C : Amazon.ca: Outils et Bricolage
    or
    Pilote De Moteur Md13s-cytron 13amp - Câble Enrouleur - AliExpress
    and cheaper one BTS7960 :
    Double BTS7960 – module de commande de moteur haute puissance 43A, pont en H, pour voiture intelligente, outil de diagnostic de courant, à faire soi même | AliExpress

    FLyPt Sketch : Showroom - FlyPT - 6DOF Brushless DIY Actuators (xsimulator.net)
    See: Code for ESP32 with internal PID calculation, version: 11.3.is from 17-04-2020:
    Last edited: Apr 14, 2023
    Flymen, Apr 14, 2023
    #2
  3. Flymen

    Flymen Flymen Gold Contributor

    Joined:
    May 19, 2018
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    +191 / 2 / -0
    My Motion Simulator:
    DC motor, 6DOF
    Hi , ( Problem number two ) @pmvcda
    After somes test , you will see on this video , with the FlyPt Mover program that when I select Icon * Rigs * my vibration come from there !!!! And I don't know why ..... missing ground led ???... or somethings else o_O
    and when I Hide this page * Rigs * everithing is fine ! Realy strange
    (1) Vibration with Dc Motors and FlyPt mover - YouTube
    Flymen, Apr 20, 2023
    #3
  4. ahoenksiluman

    ahoenksiluman Member

    Joined:
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    indonesia
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    My Motion Simulator:
    2DOF, DC motor, Arduino, Motion platform
    maybe you can try arduino uno with smc3 firmware
    it works well for me, and it have lots of adjustment
    ahoenksiluman, Apr 30, 2023
    #4