首页>
外国专利>
Shutter mechanism including stepping motor control apparatus with upper and lower limit stopping position control
Shutter mechanism including stepping motor control apparatus with upper and lower limit stopping position control
展开▼
机译:包括具有上限和下限停止位置控制的步进电动机控制装置的快门机构
展开▼
页面导航
摘要
著录项
相似文献
摘要
A shutter mechanism includes a drum (2), a stepping motor (5), a driver (20), a microcomputer (10), a memory (16), and a load magnitude detection circuit (30) that detects the magnitude of the load on the stepping motor (5) when an object such as a shutter (3) is either wound or unwound from the drum (2). The microcomputer (10) can set the upper and lower limit stopping positions of the shutter (3) by resetting the number of command pulses stored in the memory (16) when the load magnitude detection circuit (30) detects an increase in the load at the stepping motor (5), and storing the number of command pulses output to that point from the memory (16) when the load magnitude detection circuit (30) next detects an increase in the load at the stepping motor (5) after the outputting of the command pulses is next restarted.
展开▼