I want to use the motor from a CD to provide feedback for the position of my antenna rotor. I DO NOT have a scope to help trace out the wiring to the hall sensors. I can tell there are 8 pins leading to the hall sensors but have no way of knowing which one is which. I can easily tell which 3 are for the motor windings, but I am after the hall sensor pin out.
Thanks
Bob :-?
I should have been more clear. 11 pins total, 3 for the motor 8 for the hall sensors. I thought about using the motor windings as long as I could get directional information (CW or CCW) Eventually I want to use a LCD display to show me the position in degrees. The motor windings are easy to trace out.
Bob 
I have the CD motor gear to one of the other gears so that it makes about 9 revolutions to the one revolution of the main output. This is a dumb rotor like most TV antenna rotators. It uses a 2 phase AC motor, and the controller works on time. The main output turns about 1 RPM, so if the controller tells it to turn 90 degrees, it only runs the motor for 30 seconds. When you add wind and antenna loading to it, it can load down enough to be off 10 degrees or better. I tried using a pulse disc and a encoder from a mouse but found it was almost impossible to find a way to mount the pulse disc. Being a HAM radio operator, we are cheap and try to make thing with what we have on hand. I tried to trace the hall sensor wiring, but you would have to remove the motor windings to see them all. I was hoping there was some logic to their pin out, like pins 1&2 were the supply and 3&4 were one output pair and 5&6 sere another output pair ect. Will have to try feeding a volt through them and see what I get.
I would expect the hall sensors to have a relatively standard pinout. If you can see them well enough to see which tracks go where.
Does this work as position feedback? My impression was that a spindle motor had about 9 windings and 10 magnetic poles, so that one "phase" would advance the rotor only a fraction of a rotation, and the hall sensors were used for sensing position within a single phase rather than within a single revolution...
I am only using the motor for the 3 hall sensors built into it. I am not sure how many pulses per rev the halls sensors would provide but I am guessing at 30 plus per sensor per revolution. Once I figure out how to power up the sensors, I will have to build something to count the pulses before I can do the match of how many pulses = 1 degree of antenna movement.