Position detection in an electric drive unit for cords of blinds

A method for controlling an architectural covering, the method comprising:

• winding, by using an electric motor of the architectural covering, a blind of the architectural covering in a first direction;
• stopping the winding by the electric motor of the blind in the first direction at a programmatically adjustable wound end position;
• and
• upon the blind reaching the programmatically adjustable wound end position, winding, by using the electric motor, the blind in an opposite direction to a second position relaxing at least a cord of the blind that is wound by a cord winding/unwinding unit driven by the electric motor, the difference between the programmatically adjustable wound end position and the second position being an amount less than that which would result in movement of the blind to a fully extended position and set based on a length of the blind.

A controller of an architectural covering, the controller comprising:

• one or more processors;
• and
• one or more memories storing instructions that, upon execution by the one or more processors, configure the controller to control operations of an electric motor of the architectural covering to at least:
• wind a blind of the architectural covering in a first direction;
• stop winding the blind in the first direction at a programmatically adjustable wound end position;
• and
• upon the blind reaching the programmatically adjustable wound end position, wind the blind in an opposite direction to a second position relaxing at least a cord of the blind that is wound by a cord winding/unwinding unit driven by the electric motor, the difference between the programmatically adjustable wound end position and the second position being an amount less than that which would result in movement of the blind to a fully extended position and set based on a length of the blind.