I have a CanoScan 5000 scanner, which falters when initializing ... and also when scanning an image. That is, the movement of the scanning platform is not smooth, but 'stutters', and does not produce a successful image.
My initial guess is that the problem is with the stepper motor which moves the scanning platform. Another possibility is that the nylon gears that mesh with the output shaft of the motor have worn and are slipping. It is difficult to pinpoint the exact cause, since I have not been able to activate the stepper motor drive by itself ..... only when assembled ... and the case is closed.
Stepper Motor:
Astrosyn
Type 14PM - M201 -G11ST
Minebea Co. Ltd.
My question at this time is whether this type of stepper motor can wear out?
I have disassembled this motor, and there is a ferrite stator ring, with fine, inboard, indentations, along with 8 radial coils. The rotor has a matching ferrite disk, placed in direct proximity to the stator.
There is no obvious sign of wear within the motor .... iron dust .... or anything else.
Is it possible that the gap between the stator and rotor ferrites has somehow enlarged or increased, thereby decreasing the motor torque?
.... Something that I am missing here?
Thanks ....
My initial guess is that the problem is with the stepper motor which moves the scanning platform. Another possibility is that the nylon gears that mesh with the output shaft of the motor have worn and are slipping. It is difficult to pinpoint the exact cause, since I have not been able to activate the stepper motor drive by itself ..... only when assembled ... and the case is closed.
Stepper Motor:
Astrosyn
Type 14PM - M201 -G11ST
Minebea Co. Ltd.
My question at this time is whether this type of stepper motor can wear out?
I have disassembled this motor, and there is a ferrite stator ring, with fine, inboard, indentations, along with 8 radial coils. The rotor has a matching ferrite disk, placed in direct proximity to the stator.
There is no obvious sign of wear within the motor .... iron dust .... or anything else.
Is it possible that the gap between the stator and rotor ferrites has somehow enlarged or increased, thereby decreasing the motor torque?
.... Something that I am missing here?
Thanks ....