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Question 2dof compact build. Motor question

Discussion in 'DIY Motion Simulator Projects' started by Michael Yoshi, Jan 28, 2025 at 10:10.

  1. Michael Yoshi

    Michael Yoshi New Member

    Joined:
    Dec 25, 2021
    Messages:
    16
    Balance:
    79Coins
    Ratings:
    +0 / 0 / -0
    My Motion Simulator:
    2DOF, Arduino
    So far my build is:
    These motors
    2 BTS7960 drivers
    Random Arduino mega I have lying around
    1 600 Watt power supply
    Random potentiometers I have lying around.
    Ujoint from an old drive shaft I have

    First question - Are those motors quick enough for a basic 2DOF?

    Second question - Any tips for a compact build? My general thought is a 2.5ftx3.5ft rectangle top and bottom. I have a welder but I'm in an apartment like area so grinders and such are a bit much.
    Last edited: Jan 28, 2025 at 13:27
    Michael Yoshi, Jan 28, 2025 at 10:10
    #1
  2. Michael Yoshi

    Michael Yoshi New Member

    Joined:
    Dec 25, 2021
    Messages:
    16
    Balance:
    79Coins
    Ratings:
    +0 / 0 / -0
    My Motion Simulator:
    2DOF, Arduino
    upload_2025-1-28_18-26-18.png
    75rpm seems low but I'm not aming for a ton of movement.
    Michael Yoshi, Jan 28, 2025 at 10:26
    #2
  3. Joe Cortexian

    Joe Cortexian Member Gold Contributor

    Joined:
    Sep 8, 2021
    Messages:
    76
    Balance:
    475Coins
    Ratings:
    +16 / 0 / -0
    My Motion Simulator:
    3DOF
    My motors are 36RPM and I don’t have any complaints. The lower RPM gives you more torque for the same power.

    SMC3 was designed for Uno. It doesn’t do much abstraction. I know it won’t compile on Leonardo due to the way that it sets up PWM on pins which are not PWM pins by default. Mega I don’t know for sure. You can always buy an Uno if it doesn’t work.
    Joe Cortexian, Jan 28, 2025 at 18:34
    #3
  4. Michael Yoshi

    Michael Yoshi New Member

    Joined:
    Dec 25, 2021
    Messages:
    16
    Balance:
    79Coins
    Ratings:
    +0 / 0 / -0
    My Motion Simulator:
    2DOF, Arduino
    Good to know the motors look like they'll work. Since I'm working in a compact space, more torque makes sense. Was a bit worried one power supply wouldn't be enough.

    And yea, I have a drawer full of different arduinos. One of them will work lol.
    Michael Yoshi, Jan 29, 2025 at 00:31
    #4
  5. Joe Cortexian

    Joe Cortexian Member Gold Contributor

    Joined:
    Sep 8, 2021
    Messages:
    76
    Balance:
    475Coins
    Ratings:
    +16 / 0 / -0
    My Motion Simulator:
    3DOF
    Your PSU will work but when I upgraded from under spec to over spec it worked better. This meant I had to dial down the output in some cases. I think my original PSU was only 360w.
    Joe Cortexian, Jan 29, 2025 at 13:01
    #5