Actualy I am not shure this is the right forum to post this but anyway.
So I took the rotor out of the stator and do not even know the specs of the stepper. 86 mm diam motor.
From seeing the rotor it looks like somethin metallic, definately not neodimium but more like AIN. How many poles do a rotor has?
I have 25 NeFb magnets grade 35, dimentions 2"x1"x0.5" for a windturbine project. Supposing if the rotor has 4 poles N S N S
I could arrange 4 of my neodimium magnets like this, just in the entrance of the stator,
. N
. |
S- -S
. |
. N
so when I introduce the rotor back in the stator, the neodimium magnets will remagnetize the rotor.
I guess I could find out the number of poles with a small magnet, I would have to take the rotor out again though. When I had my rotor outside I tested the magnetic field by getting close a small washer and the magnet wasnt very strong either.
A specialized rewinding shop could reassemble a motor and remagnetize it based on original specifications, but I dont know the specs of my motor anyway.