NEWB: trying to drive funny motor from laser printer

Jan 06, 2005 4 Replies
H

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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



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R

Closest I can find are datasheets for the M56733AFP. Might (or might not) be a close relative. Check on either

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Rich Webb Norfolk, VA
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H

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
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D

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.

of

mine

just

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T

Hello!

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

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