NEWB: trying to drive funny motor from laser printer

[h]

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

 

[Rich Webb]

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

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

 

[h]

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

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

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

 

[Dingo]

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.

 

[Tekko]

Hello!

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