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3V DC motor very weak even with new batteries

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  • 07-09-2013 1:50pm
    #1
    flashforward
    Registered Users Posts: 314 ✭✭


    The motor is enclosed so I cant get to it, powered by 2 AAA batteries. It has a few different speeds that are controlled by a single button. The Motor is very weak even with brand new batteries (5%of total power ) but when I hit the unit on the fastest setting the motor speeds up and holds (50% of total power) once the speed button is pressed it reverts back to 5%.

    This is a brand new unit so it should be working.


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    #2
    coylemj
    Registered Users Posts: 25,457 ✭✭✭✭coylemj


    Are you using rechargables or alkaline batteries?


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    #3
    flashforward
    Registered Users Posts: 314 ✭✭flashforward


    Brand new alkaline.


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    #4
    coylemj
    Registered Users Posts: 25,457 ✭✭✭✭coylemj


    Any fear one of the batteries is a dud? It does happen.


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    #5
    flashforward
    Registered Users Posts: 314 ✭✭flashforward


    Tried 2 new sets from 2 different brands. Can't understand why the motor picks up speed when the unit is struck. Once the setting is changed it reverts to approx 5% power.


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    #6
    stoneill
    Registered Users Posts: 3,609 ✭✭✭stoneill


    Sounds more like a mechanical problem than an electrical. There is some friction going on there - does it feel hot?


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    #7
    JonathanAnon
    Closed Accounts Posts: 23,718 ✭✭✭✭JonathanAnon


    flashforward wrote: »
    Tried 2 new sets from 2 different brands. Can't understand why the motor picks up speed when the unit is struck. Once the setting is changed it reverts to approx 5% power.

    If it works properly on one of the settings, then there is no problem with the power source.

    What "setting" are you changing. Is it a pot? Maybe it's faulty?


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