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Advantages and defects of the stepper motor



Advantages
1, the rotation angle of the motor is proportional to the number of pulses;
2, when the motor has a maximum stall torque (the time when winding excited);
3, since the accuracy of each step in the three to five percent, and the accumulation of error does not step to the next step and therefore a better positional accuracy and repeatability of movement;
4, excellent response to start and stop and reverse;
5, since there is no brush, high reliability, and therefore the life of the motor It depends only on bearing life;
6, only the motor is determined in response to the digital input pulse, it is possible to open-loop control, which makes the structure of the motor can be relatively simple and cost control;
7, only the load is connected directly to the shaft of the motor It may be a very low speed synchronous rotation;
8, since the speed is proportional to the pulse frequency, and thus have a relatively wide speed range.
Defect
1, if not properly controlled easily resonance;
2, difficult to operate to a higher speed;
3, it is difficult to obtain large torque;
4, there is no advantage, low energy efficiency in terms of weight by volume;
5, the load will exceed destruction of sync, it will send out vibrations and noise at high speed.