Movable barrier operator

Details Movable barrier operator Movable barrier operator

E - Fixed Constructions

05

F

E05F 15/18 (2006.01) E05F 15/16 (2006.01)

Patent

CA 2461177

A movable barrier operator having improved safety and energy efficiency features automatically detects line voltage frequency and uses that information to set a worklight shut-off time. The operator automatically detects the size of door and uses that information to set a maximum speed of door travel. The operator moves the door with a linearly variable speed from start of travel to stop for smooth and quiet performance. The operator provides for full door closure by driving the door into the floor when the DOWN limit is reached and no auto-reverse condition has been detected. The operator provides for user selection of a minimum stop speed for easy starting and stopping of sticky or binding doors.

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