Gate operator and method using automatic limit adjustment

摘要: A gate operator for moving a between two fixed end positions such as opened position and closed minimizing the possibility of impact with structure at either these positions. The relies upon measuring number electrical pulses or so-called counts representative distance includes controller in which are measured movement from an open to position, count is automatically readjusted eliminate any hard contact position. In one important embodiments invention, utilizes controlled coasting system. this case, driven toward other by motor de-energized preselected advance moving. If still strikes overdrives compensates so that reaches stops.