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the pololu turning off

Discussion in 'DIY Motion Simulator Projects' started by hooshang, Jan 5, 2012.

  1. hooshang

    hooshang Active Member

    Joined:
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    My Motion Simulator:
    2DOF, DC motor, AC motor, Arduino, 6DOF
    hello freinds
    i am using Thanos AMC 1.5 along with pololu VNH2SP30 and 2 wiper motors
    in my project.i have problem of my pololu turning off(just motor 1)and getting
    stop sometimes during operation while the second one work smoothly nonstop,
    when i just plug off the whole system and turning on after a couple of seconds
    it just works well again. i just mixed up what and where is the problem :?
    thank you for any help or guide...
    regards
    Hooshang
    hooshang, Jan 5, 2012
    #1
  2. bsft

    bsft

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    do you have heatsinks on the boards big chip? Are they overheating? One could be and not the other.
    Is the power supply ok?
    Have you earth isolated the motors?
    Is the tronic card working properly?
    Did you email pololu service?
    bsft, Jan 5, 2012
    #2
  3. eaorobbie

    eaorobbie Well-Known Member SimTools Developer Gold Contributor

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    CAD Detailer
    Location:
    Ellenbrook, Western Australia
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    My Motion Simulator:
    2DOF, DC motor, JRK, SimforceGT, 6DOF
    could be a heat issue mate,
    i found when pushing this drivers which was originally
    designed for small battle robots, or line followers, need a heatsink over the
    main chip plus a small fan helps.

    Check the running temps mate, plus another could be how fast the updates are comming to the card,
    which can cause a motor error.
    eaorobbie, Jan 5, 2012
    #3
  4. hooshang

    hooshang Active Member

    Joined:
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    Balance:
    285Coins
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    +157 / 3 / -0
    My Motion Simulator:
    2DOF, DC motor, AC motor, Arduino, 6DOF
    hello freinds and thank you for quick reply
    i have heatsink and there is no overheating
    motors installed on the wood...
    2012-01-06 15.46.19.jpg
    2012-01-06 15.42.46.jpg
    ?... :? think so
    not yet...you mean should be better test another one(pololu card)?
    hooshang, Jan 6, 2012
    #4
  5. bsft

    bsft

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    Hello Hoosang, firstly with your motors. Even though they are on wood, the metal case is still connected to the rod end and unless you have isolated the earth off the motor, there is a good chance you are running 12 volts through the sim chassis. It may not sound like a problem, but you may be feeding back 12 volts through the power wires to the boards and upsetting them.
    Secondly, I think I can see a potentiometer bolted to the metal bracket that the motor is on. This also could be feeding a 12 volt signal back to the control boards if yo have not isolated the earth off the motors.
    Suggestion is, isolate the earth of the motors so you cannot use the motor housing as an earth, unless you have already done so. Check this first before telling pololu the problem.
    Also email pololu service with your issue, and they maybe able to help.
    Go with that. However, feel free to try another board if you have it.
    Cheers, David.
    bsft, Jan 6, 2012
    #5
  6. hooshang

    hooshang Active Member

    Joined:
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    Balance:
    285Coins
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    +157 / 3 / -0
    My Motion Simulator:
    2DOF, DC motor, AC motor, Arduino, 6DOF
    hello Daivid
    thank you so much of your fruitful help and also giving time freind
    lets doing this(properly isolating everythings which takes time)first and being in touch
    later of results
    best regards
    Hooshang
    hooshang, Jan 6, 2012
    #6
  7. JimmyPaul

    JimmyPaul New Member

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    Thanks for sharing.Recent times Cheap Nike Free Run 2 is very popular and hot.I think you'd better have a look no matter you will buy or not.
    JimmyPaul, Mar 29, 2012
    #7