Validation of spring-balancing of a motorized window treatment

A motor drive unit for a system for raising and lowering a covering material, the system comprising one or more lift assistance springs configured to provide lift assistance to the motor drive unit and a battery holder configured to receive at least one battery for powering the motor drive unit, the covering material configured to be adjusted between a lowered position and a raised position, the motor drive unit comprising:

• a motor configured to be operatively coupled to the covering material for adjusting a present position of the covering material in response to rotation of the motor;
• and
• a control circuit configured to control the motor to rotate for adjusting the present position of the covering material;
• wherein, during a test procedure, the control circuit is configured to:
• control the motor to adjust the present position of the covering material through a movement between the lowered position and the raised position;
• determine a magnitude of an input power of the motor drive unit as consumed from the at least one battery during the movement of the covering material between the lowered position and the raised position;
• determine that the system requires more or less lift assistance springs based on the input power of the motor drive unit during the movement of the covering material between the lowered position and the raised position;
• and
• in response to determining that the system requires more or less lift assistance springs, communicate an indication that the system requires more or less lift assistance springs.

A method of controlling a window treatment system for raising and lowering a covering material, the window treatment system comprising one or more lift assistance springs configured to provide lift assistance to the motor drive unit and a battery holder configured to receive at least one battery for powering the motor drive unit, the covering material configured to be adjusted between a lowered position and a raised position, the method comprising:

• adjusting a present position of the covering material through a movement between the lowered position and the raised position;
• determining a magnitude of an input power of the motor drive unit as consumed from the at least one battery during the movement of the covering material between the lowered position and the raised position;
• determining that the window treatment system requires more or less lift assistance springs based on the input power of the motor drive unit during the movement of the covering material between the lowered position and the raised position;
• and
• in response to determining that the window treatment system requires more or less lift assistance springs, communicating an indication that the window treatment system requires more or less lift assistance springs.

At least one computer-readable storage medium having computer-executable instructions stored thereon that, when executed by a control circuit, cause the control circuit to:

• control a motor of a motor drive unit to adjust a present position of a covering material through a movement between a lowered position and a raised position, the motor drive unit configured to receive lift assistance from one or more lift assistance springs and receive power from at least one battery;
• determine a magnitude of an input power of the motor drive unit as consumed from the at least one battery during the movement of the covering material between the lowered position and the raised position;
• determine that more or less lift assistance springs are required based on the input power of the motor drive unit during the movement of the covering material between the lowered position and the raised position;
• and
• in response to determining that the more or less lift assistance springs are required, communicate an indication that the more or less lift assistance springs are required.