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本文介绍了获得精密小步距角步进电动机的原理和方法。２００ＢＦ型精密小步距角步进电动机通过增加定、转子齿数和采用具有细分线路的驱动器，并且采用了一些提高精度的措施，因而达到了１分的分辨率（步距角），步距角误差小于１．５分，积累误差小于３分。其样机直接驱动数控铣床的分度装置，加工电机转子轴的４０等分齿槽，结果，加工相邻误差不超过４分，累积误差不超过５分。
This article describes the principle and method of obtaining a precision stepper stepper motor. The Model 200BF Precision Step Stepping Motor achieves a resolution of 1 point (step angle) by increasing the number of stator and rotor teeth and using a driver with subdivision lines and using some measures to improve accuracy, Angular error is less than 1.5 points, accumulation error is less than 3 points. The prototype directly drives the indexing device of the CNC milling machine and processes 40 equally-spaced tooth slots of the rotor shaft of the motor. As a result, the machining error does not exceed 4 points and the cumulative error does not exceed 5 points.