stepper
A standard type motor may be switched to a smaller geared motor as long as both motors operate at equivalent torque. For example, a standard type motor with a frame size of 85 mm (3.35 in.) can be replaced by the geared motor with a frame size of 60 mm (2.36 in.), thereby reducing the mass from 1.8 kg (4.0 lb.) to 1.5 kg (3.3 lb.) (comparison between AS98AAE and AS66AAE-N5). Positioning accuracy can be measured by the stop position accuracy (angular transmission error for the small geared stepper motor). The stop position accuracy (angular transmission error) refers to the difference between the theoretical rotation angle (this is the rotation angle calculated from the number of input pulses) and the actual output shaft's rotation angle. The error closer to 0 represents higher rigidity.
This is a great first stepper motor, good for small projects and experimenting with steppers. This uni-polar motor has a built in mounting plate with two mounting holes. There are only 32 step (11.25 degree) per revolution, and inside is a 1/16 reduction gear set. (Actually its 1/16.032 but for most purposes 1/16 is a good enough approximation) What this means is that there are really 32*16.032 steps per revolution = 513 steps! The shaft is flattened so its easy to attach stuff to it with a set-screw. A perfect first best stepper motor online and works well with the motor. Positioning accuracy against the fluctuating friction load is an important determinant of motor rigidity. This feature applies to any type of geared motor. Therefore, geared motors are more effective for positioning operation for vertical drive and other applications in which friction load fluctuates due to the varying quantity and weight of the load. The gearing has a few side effects which are important to note.