How to overcome the two-phase hybrid stepping motor vibration and noise -

How to overcome the two-phase hybrid stepping motor vibration and noise of the
stepper motor rotates at low speed vibration and noise is its inherent shortcomings, general can adopt the following solutions to overcome:
as A stepper motor works just in the resonance region, but by changing the reduction ratio of mechanical transmission to avoid the resonance zone:
B USES with the function of subdivision drive, this is the most commonly used, the easiest way;
C into step torque Angle smaller stepper motor, such as three-phase or five phase stepper motor:
D with ac servo motor, is almost completely overcome the vibration and noise, but the high cost:
E on the motor shaft and magnetic damper.