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Question Pololu JRK 12v12 motor error

Discussion in 'SimTools DIY Version' started by MichaelS, Nov 18, 2019.

  1. MichaelS

    MichaelS New Member

    Joined:
    Oct 22, 2019
    Messages:
    20
    Balance:
    135Coins
    Ratings:
    +4 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    Hi all,

    i had a few weeks of the simulator, i followed the pid tutorial and made quite a good profile i think. I just have the problem that while racing the motor go outside the range i gave them and they give the motor error drive but also they dont correct themself untill i push them back towards the position. You hear the engine sort of rattling/shaking like an error. In the pololu interface you can also see the motor driver error count up.

    I tried it with more proportial, less proportial and more and less derative according.
    Also tried it with more axis limiting but need to go to 50 procent or less will it happen a lot less.

    The motors are brushed dc engines.
    25:1 MCP 4 Gearbox and a ZYT 90-155-12V DC 23 Amps 65 RPM

    I placed cooling fins from an old computer processer block on the pololu's with a cooling fan next to them but they feel quite hot till really hot at some moments. Does anybody else also have that they get hot?

    Can someone help me with this problem? Not really sure what more info to put here, if you need more info please let me know and i will post them.

    Kind regards
    Michael
    MichaelS, Nov 18, 2019
    #1
  2. yobuddy

    yobuddy Well-Known Member Staff Member Moderator SimAxe Beta Tester SimTools Developer Gold Contributor

    Joined:
    Feb 9, 2007
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    5,162
    Occupation:
    Computer Technician
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    Portland, Oregon - USA
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    48,171Coins
    Ratings:
    +5,036 / 16 / -0
    yobuddy, Nov 18, 2019
    #2
  3. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
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    20,539
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    St Helens, Tasmania, Australia
    Balance:
    145,052Coins
    Ratings:
    +10,776 / 52 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    noorbeast, Nov 18, 2019
    #3
  4. MichaelS

    MichaelS New Member

    Joined:
    Oct 22, 2019
    Messages:
    20
    Balance:
    135Coins
    Ratings:
    +4 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    I will read those topics tomorow @yobuddy , thanks :)

    @noorbeast I have them at 40 degrees up and 40 degrees down.
    MichaelS, Nov 18, 2019
    #4
  5. MichaelS

    MichaelS New Member

    Joined:
    Oct 22, 2019
    Messages:
    20
    Balance:
    135Coins
    Ratings:
    +4 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK
    After reading through a lot of other topics aswell i have decided to switch to a sabertooth 2x32 and an arduino. Just the main question i still have after reading through all the topics is that the sabertooth only has 1 power input, which power supply do you need?

    a 24v power supply?
    a really high amps > 70 12v supply?

    i have currently 2x: 12v 480 40A led power supplies which i used for the JRK.

    thanks in advance.
    MichaelS, Nov 19, 2019
    #5