Stepping motor driving method and system and storage medium

Abstract

The invention discloses a stepping motor driving method and system and a storage medium, and the method comprises the steps: presetting the rotation stroke of a stepping motor according to an application scene; in response to the forward rotation command, starting from the starting position, driving the stepping motor to perform double-phase acceleration to the middle position of the rotation stroke, and then driving the stepping motor to perform double-phase deceleration to the holding position to stop; holding the single coil at the holding position; and in response to the reverse rotation command, driving the stepping motor to perform double-phase acceleration to the middle position of the rotation stroke, and then driving the stepping motor to perform double-phase deceleration to the start position to stop. By adopting the method, the stepping motor can be quickly and stably started and stopped in a fixed stroke.

Description

technical field [0001] The invention relates to a driving method of a stepping motor, in particular to a driving method of a stepping motor applied to an optical path switch, a driving system for implementing the method, and a storage medium for storing the method. Background technique [0002] The optical path switch is generally used in the switch control of the laser beam. By rotating the shutter to the designated position, the beam can be completely turned off, so as to achieve the controllable switch of the beam in the optical path. With the miniaturization of the optical path, the mechanical shutter generally needs to have the characteristics of small size, low noise, fast response, and fast and accurate shutdown. [0003] The optical switch is usually composed of three parts: a light barrier, a stepping motor and a drive circuit. The function of the light blocking sheet is to block light. By fixing the light blocking sheet on the rotor of the stepping motor, when the...

AI Technical Summary

Problems solved by technology

It is common that the moment of inertia of the stepping motor rotor of this volume is less than 10 gm^2, while the moment of inertia of the light blocking sheet is greater than that of the stepping motor rotor itself. In this way, when the moment of inertia of the light blocking sheet is too large, the traditional fine The split-drive gait will cause the jitter caused by the inertia to continue to move forward after the light baffle reaches the designated position

For example: for a common 20-step stepper motor that meets the volume requirements (18 degrees for a single step, the torque is about 1mNm), after installing the light barrier, the single-step step time is about 4ms, and the time for two steps to 36 degrees It is about 6ms, but due to the inertia, it will swing back and forth around this angle, and the final stop time is about 100ms. The maximum angle of the initial overshoot can reach more than 18 degrees. Overshoot will affect the light blocking effect. Generally, the mechanical shutter can respond quickly. The shape of the designed light barrier is slightly larger than the spot size, and once the overshoot exceeds 2-3 degrees, it cannot be turned off, so the traditional subdivision drive cannot be applied to the miniaturized optical path that requires fast optical switches

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