My question regards the ‘Small size and high torque’ bipolar 5V stepper motor 24BYJ48S Digikey part number [1597-1203-ND ].
The digikey description of the part says it has 2048 steps/rev and a step angle of 0.176 degrees.
The datasheet from the manufacturer the step angle is 5.625°/32 which agrees with the above and I assume the reason for putting it in this form is because the motor has a 1:32 reduction gearbox.
I have taken the motor apart to find that it has 2 coils, each of which has 16 positions on it, making a total of 32 steps for a complete revolution. The gearbox train then appears to result in a 1:32.86914 reduction. 32 X 32.86914 gives rise to 1051.8 steps/ revolution. Driving this motor I also find that nominally 1024 (32 x 32) steps will move the spindle through a complete revolution, rather than the 2048 steps described in the datasheet and the product description.
Is the datasheet wrong, or am I?!