Motorized roller tube system having dual-mode operation

A motorized roller tube system comprising:

• a rotatably supported roller tube;
• a flexible member engaging the roller tube for winding receipt of the flexible member by the roller tube;
• a motor having an output shaft rotated at a motor speed;
• a gear assembly connected to the output shaft of the motor and to the roller tube such that gear assembly is driven by the motor and the roller tube is driven by the gear assembly, the gear assembly producing an output rotational speed that is reduced with respect to the motor speed;
• and
• a controller connected to the motor and adapted for variable-speed control of the motor speed to provide for movement of the flexible member during winding or unwinding of the flexible member at a substantially constant linear speed,
• the controller responsive to a first control signal to control the motor such that the flexible member moves at a first predetermined linear speed, the controller responsive to a second control signal to control the motor such that the flexible member moves at a second predetermined linear speed that differs from the first predetermined linear speed.