The difference between a stepping motor and other motors is that the stepping motor must be connected to the control pulse to run, otherwise it Purifier motor cannot work. The simplest operation method of a stepping motor is to form an open-loop system with control pulses. Compared to traditional AC and DC servo systems, the so-called incremental position control system has a significantly reduced cost, and almost no system adjustment is necessary. With the digitalization of the control system, the application of stepper motors is becoming more and more widespread. In response, semiconductor manufacturers in various countries have developed and produced a large number of ASICs suitable for stepper motor control.
The aforementioned static torque characteristics of stepper motors are the most important characteristics. The angular accuracy of the stepping motor can be directly connected by a high-resolution encoder through a coupling (so that the rotational displacement does not occur during rotation). The angle is used as a number, which is read by a human counter and calculated by a computer. The results are output by a printer or X-Y plotter and other equipment as the evaluation data of the motor. Position accuracy: An arbitrary point of the rotor is taken as the starting point, so that the measurement is performed once per step, and the motor continuously rotates once to find the difference between the actual position of the rotor and the theoretical position.
The error expressed by the range of positive maximum and negative maximum is called position error, and it is expressed by the percentage (%) of the basic step angle. Step angle accuracy: When the rotor starts from any point and continuously runs, find the difference between the measured angle of each step angle and the theoretical step angle. It is expressed as the percentage of the theoretical step angle (%), which is called the step distance. Angular accuracy is expressed as the maximum value on the (+) and (-) sides in one revolution. Hysteresis error: After the rotor rotates forward from any point for 1 turn, it rotates in the reverse direction to return to the origin. The largest deviation among the deviation angles of each measurement position is called the hysteresis error.
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