Shanghai four macros stepper motor based on the focus evaluation function of image processing system, the common focusing strategy including Fibonacci search method and climbing search method, and the most widely used to climb the mountain search method. According to the principle of mountain climbing search, at the start of a search, first reset focusing lens to start the search location, in the process of search focus, to prevent misjudgment caused by image noise interference program, lead to focus the lens is out of focus range boundaries. In order to meet the control requirements, the general stepping motor controller is improved, in which has the function of automatic and manual control at the same time, the introduction of limit signal feedback control. The motor controller using hardware description language (HDL)Writing, and limit signals by position sensing automatic feedback circuit of photoelectric switch device. Shanghai four step motor is a kind of macro converts electrical pulses to angular displacement or linear motion the execution of the equipment. In the case of the overload, motor speed and stop position depends only on the pulse signal frequency and pulse number, and not affected by load change, so the stepper motor is widely used in precision control occasions. the main products: stepper motor, brushless motor, servo motor, stepping motor drive, brake motor, linear motor and other kinds of models of the stepper motor, welcome to inquire. Telephone:
