CD ROM Motors ?

Here is one place to start: http://electronics.howstuffworks.com/cd6.htm

I would bet money that one of those 3 motors is a stepper motor, so start by
Googling on stepper motors.
You will get better technical data if you can find a make and model #
somewhere on each motor, then Google on that.

If you want to build a robot using these motors you could start by Googling
"floppy bot" --- there are a few pages on the net for building a small robot
using floppy disk drive motors and electronics.

Hope that gets you started!
JCD

On Wed, 25 Jan 2006 19:31:26 -0500, "pogo"


   All of the ones from the drives I've taken apart are DC motors.


   I hope you can read Japanese. :) I think it would be easier to test
each motor yourself. You might want to measure the voltages across
each while it's reading a CD before you take it apart, so you know the
approximate range of voltages you should apply.

i guess from my cd player observation that one is normal dc motor which
is just to rotate the disk with desired speed and another is stepper
motor which is used to move the laser- lense assembley to perfectly
measured desired track.. i dont kno about another one..

There should be three motors:
1. Plain DC motor for ejecting and retracting CD-ROM tray.
2. Small stepper motor for positioning optical head.
3. High-torque brushless motor for spinning the disc.

The brushless spindle motor requires a special controller. The motors
are popular for use in tiny RC aircraft. A lot of the time this requires
rewinding the stator and possibly replacing the bearings.

i guess from my cd player observation that one is normal dc motor which
is just to rotate the disk with desired speed and another is stepper
motor which is used to move the laser- lense assembley to perfectly
measured desired track.. i dont kno about another one..