Performance analysis and classification of stepper motor drive open-loop control system
Release Time:
Jul 28,2022
The stepper motor runs under a drive pulse with a certain conversion direction, according to which the stepper motor driver is divided into two parts: direction control and logic output.The limit signal is used to reset and define the operating direction, so the limit is processed at the same time in the direction control part; in the logic output part, it is divided into three logic processing modules: reset, automatic and manual according to the control requirements. In the implementation of the logic output, reset, automatic and manual pass a certain priority logic, and the logic output module is multiplexed by sending a motor occupancy request.
The stepper motor runs under a drive pulse with a certain conversion direction, according to which the stepper motor driver is divided into two parts: direction control and logic output.The limit signal is used to reset and define the operating direction, so the limit is processed at the same time in the direction control part; in the logic output part, it is divided into three logic processing modules: reset, automatic and manual according to the control requirements. In the implementation of the logic output, reset, automatic and manual pass a certain priority logic, and the logic output module is multiplexed by sending a motor occupancy request.
The mountain climbing reset module is used to reset the focusing lens to the starting position of the mountain climbing search.After the stepper motor driver captures the reset signal of the command unit, it generates the drive logic in a predetermined operating direction until the controller receives the effective feedback of the limit signal LIMIT and stops.During the reset process, automatic and manual requests are invalid.
The step count data of the stepper motor driver, the receiving end of the data, after receiving the number of operating steps passed in by the command unit, first checks whether there are currently other motor occupancy requests. If the motor is idle, the drive logic for the specified number of steps is output according to the direction signal passed in at the same time; otherwise, the automatic control request is ignored.
Manual fine-tuning is used as an auxiliary control means in the drive, allowing manual fine-tuning of the position of the focusing lens.Each time the manual fine-tuning is started, the motor runs for a fixed fine-tuning distance in accordance with the set operating direction.After the driver captures the MANUAL INPUT signal, IT reads the set value of the manual OPERATING direction at THE same time. If the current motor is idle, THE drive LOGIC of A fixed number OF steps is output according to THE manually entered direction SIGNAL; OTHERWISE, THE manual request is INVALID.
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