Microstepping mode in some cases can improve the quality of a stepper motor, as well as reduce cost and overall complexity compared to using a drive system and a total step polushagovom mode. Besides, microstepping mode effectively reduces noise and resonance, while increasing the accuracy and resolution of the system.
The resonant frequency is determined by a stepper motor torque retention of the rotor inertia and the load, and the total number of steps per revolution. At low damping system stepper motor there is a risk of noise and loss of steps when the stepper motor is running at the resonant frequency, or close to it, depending on the damping, the total inertia and type of stepper motor. These problems can occur at integer or close to them values or fractions of natural frequency. Usually the frequency closest to the natural frequency, causing most problems.
The main source of these resonances is that using drivers without microstepping mode, the magnetic stator flux moves intermittently, causing the energy flow through the rotor pulsation and the pulsation excite resonance. Using polushagovogo mode excitation energy decreases by about twenty-nine percent in comparison with the total step mode. If we include the micro-stepper motor mode is 1/32 of a full step, then there is only one percent of the total energy step. You can reduce the excitation energy to a sufficiently low level so that all the resonances have been completely eliminated by microstepping mode of engine operation.
However, this is only true for an ideal stepper motor. In real systems, there are additional sources that excite resonances. Regardless, the microstepping mode improves movement in virtually all use cases, and in many cases significantly reduces noise and vibration for most systems.
When you run a stepper motor at low frequencies polushagovom or total step mode, the intermittent movement, vibration and noise occur. The frequency in which this happens, lower the natural frequency of the stepper motor system, so microstepping mode is safe and simple means of extending the range of silent close to zero operating frequencies.
Typically microstep less than 1/32 of the magnitude of the full step is not needed - such small step angles electrically easily absorbed by the internal friction of the stepper motor, which means that such a step does not cause surges or noise. microsteps position will deviate from the straight line due to uncompensated profiles sine / cosine.
