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Thread: What kind of motor do you think i need?

  1. #1

    Default What kind of motor do you think i need?

    hi,
    I'm doing an experiment, in realisation of which i need to move a steel plate up and down. Please consider the following constraints faced by me:

    -The plate would rise to 12mm at most.

    -The speed should be such that it rises 12mm in around half a second.

    -I want to be able to stop the plate anywhere between 0-12mm.

    -Variation of the speed may also be needed.

    -The plate will be exposed to high pressurefield above, so will tend to come down.

    -I have only 75mm(L)*175mm(W)*25mm(H) space to accommodate the lifting mechanism.

    -I can also mount the motor outside the above mentioned cavity, but the motor diameter less than 30mm is preferred.

    After considering all the above mentioned constraints, i've thought of getting a miniature rack and pinion system manufactured. But the driving motor is still not finalized and i'm facing a problem in it. Initially i thought of using a geared dc motor but then i won't be able to stop it at the precise positions (4mm say). Servos can definitely be used but the speed control is a problem.
    Stepper motor seems a good choice but i haven't got much experience working with them.

    So, please help me choose a good motor or a new mechanism.

    Thank you in anticipation.

    Abhishek.

  2. #2
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    you missed out the most important parameter - weight.
    .... I didnt do it ! ....

  3. #3

    Default

    Weight is not much of a problem.
    But given the small dimensions of the region i plan to fit the motor in, i think the motor won't weigh much.

  4. #4
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    :evil: :evil:

    weight of the steel plate.
    .... I didnt do it ! ....

  5. #5

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    well, my computer modelling tells me it would be around 220gm.

  6. #6

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    http://www.flickr.com/photos/33711228@N02/3221465139/

    this is a possible solution. I dont find a suitable motor.
    i think steppers might work, but circuit is the problem.
    I dont have any exposure of microcontroller programming.

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