I am not really making CNC machine but the 3D scanner and I need really high precision rotation! What should I be looking at? Is the answer in Stepper motor with gearbox? The resolution should be at least 0.05 degrees per step, so I thought 1.8 degree stepper motor with 1:40 gearhead but from the manufacturers I got the information that their gearheads can not guarantee that precision. Then I thought of microstepping but controller board manufacturers told me that even 1/16 microstepps are very uneven even with very good controllers and expensive motors.
The stepper will only rotate small laser and will rotate only 1/4 of the full circle, so should I be looking at servo motors?
Any recommendation please!!!