dc motor

Discussion in 'General Electronics Chat' started by danebrown.sjce, Dec 2, 2013.

  1. danebrown.sjce

    Thread Starter New Member

    Dec 2, 2013
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    i need a small motor(im confused whether to choose stepper ot dc motor i also have heard of 6mm coreless motor) i need motor wic can run on 3-5 volts less current with small size....motor has to drive minimal load ...pls suggest the type of motor and its availability

    size is the most important criteria ....
     
  2. shortbus

    AAC Fanatic!

    Sep 30, 2009
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    And we're confused as to what size you need the motor to fit into, what the minimal load actually is, and what the application is the motor is expected to do. More real information will get better results.
     
  3. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    "small" or "minimal" isn't detailed enough for you .. :p geesh so demanding.. :D
     
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  4. danebrown.sjce

    Thread Starter New Member

    Dec 2, 2013
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    motor has to mov a hollow cylinder up down ....hollow cylinder dia = 2mm length 10mm .....
     
  5. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Weight of cyclinder? rate of acell/decell? Precise positioning required? point to point or various precise positioning?
    I don't have a listing for "Minimal Load"?
    Max.
     
  6. danebrown.sjce

    Thread Starter New Member

    Dec 2, 2013
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    weight =3g
    i want to move the cylinder up and down ,controlling the motor by a micro controller ( reciprocating motion)
     
  7. MaxHeadRoom

    Expert

    Jul 18, 2013
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    But by precise positioning via feedback or will point to point via limit switch do?
    If you want to conserve current as much as possible, do not go stepper.
    Max.
     
  8. danebrown.sjce

    Thread Starter New Member

    Dec 2, 2013
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    point to point no feedback required .
    actually what im doing is a braille display . each braille character has 6 dots . im actuating
    each dot by a motor . i need a motor to serve this purpose.
     
  9. MaxHeadRoom

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    Jul 18, 2013
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    Wouldn't this constitute variable (non-repetitive) positioning?
    IOW each dot a different position?
    Or is this just the move on the detection of a dot?
    Max.
     
  10. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    IMO. a motor is a poor choice for that intended function..
    A push/pull solenoid is a better/easier solution.. no need to convert rotary to linear motion either..
    maybe a piezo actuator / voice coil
     
    Last edited: Dec 2, 2013
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  11. danebrown.sjce

    Thread Starter New Member

    Dec 2, 2013
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    @MaxHeadRoom
    i planned to use 6 motors for 6 dot. There will be 6 circular openings on the surface. each time a dot is actuated cylinder emerges out of the circular opening.
     
  12. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Now the application is a bit clearer, I agree with Mgyver a linear actuator may be the answer as it sounds as if you will need to go rotary to linear anyway?
    Dot matrix printer style and the old paper tape punch?
    Max.
     
  13. danebrown.sjce

    Thread Starter New Member

    Dec 2, 2013
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    ya i have to convert rotatory to linear motion.
    Its dot matrix style .
     
  14. danebrown.sjce

    Thread Starter New Member

    Dec 2, 2013
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    i will try both motor and solenoid (if i get a solenoid with operating voltage 3-5v ,small size and less delay).
    so with motor what are my options (which motor do u suggest??).
    with solenoid ??
     
  15. MaxHeadRoom

    Expert

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    There are many small DC motor available on ebay around that voltage.
    But the solenoid would be my first approach, if you can find an old paper tape punch it sounds like that would be ideal, but the 3-5v makes it a bit restrictive, especially with 6 operating at once?
    What kind of power source are you designing around?
    Max.
     
  16. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    There are hundreds of motors that "might" work..
    But obviously without knowing the mechanical design of how to intend to connect these to the dots its impossible to recommend a suitable motor or even a solenoid.

    A google search for "5v solenoid" will turn up TONS of products that might be used..

    But again.. there are many details that are missing from your question.. and IMO are up to YOU to figure out and define..
     
  17. danebrown.sjce

    Thread Starter New Member

    Dec 2, 2013
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    power supply 5v, 500mA.
     
  18. danebrown.sjce

    Thread Starter New Member

    Dec 2, 2013
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    thank you all for your help !!!!! :)
     
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