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NEWB: trying to drive funny motor from laser printer

Discussion in 'Electronic Basics' started by h, Jan 5, 2005.

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  1. h

    h Guest

    Picture --> http://howiem.com/random/HPLJ5_scanner_pcb.jpg

    I rescued this scanner PCB (and several like it) from some old HP laser
    printers (LJ5, I think). I want to use the polygonal mirror to create a
    scanning / liquid-sky effect using one of my laser pointers.

    I can remove the mirror and mount it on an ordinary dc motor but if it's
    possible I want to try and drive it in situ on its PCB-mounted motor - the
    bearing's deliciously smooth and I can never mount the mirrors as accurately
    on other motors.

    The driver chip on this one is a Mitsubishi chip marked M56737FP. Google
    gives me plenty of info on where to source the chips, but nothing about how
    to drive them, no data sheets etc...

    Any clues how I can try to power it up? Reckon it might need some sort of
    clock pulse as well as power.

    Any thoughts appeciated :)

    h
     
  2. Rich Webb

    Rich Webb Guest

    Closest I can find are datasheets for the M56733AFP. Might (or might
    not) be a close relative. Check on either www.alldatasheet.com or
    www.datasheetarchive.com
     
  3. h

    h Guest

    The driver chip on this one is a Mitsubishi chip marked M56737FP. Google

    Thanks Rich, much appreciated. They look related but not too closely - mine
    has way more pins... suspect I'd be better off ditching the motor, it's just
    too well integrated, shame...

    cheers,

    h
     
  4. Dingo

    Dingo Guest

    I'd assume the mirror needs to spin at a very precise speed for its original
    purpose.

    I'd say there are two power connectors you are interested and a lot of
    encoder feedback which you don't need to worry about. Unless it is a stepper
    motor, then it pretty easy to work out what needs to be pulsed in what
    order. I doubt they'd use a stepper motor for this though.

    I've just pulled a similar one from a NEC Superwriter 610 - I'll play with
    that later and see what it needs.
     
  5. Tekko

    Tekko Guest

    Hello!

    Do you still have these motors ?
    I am a collector of these things.
     
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