Electromechanical derailleur
An Actuating device for a bicycle is provided. The actuating device may include a static element which is positionally fixed in relation to a bicycle frame, a movable element which is movable in relation to the static element, an electromechanical drive which provides drive force for a movement of the movable element. The electromechanical drive has a motor and a gearing driven by the motor. The gearing may include a first gearing wheel and a second gearing wheel which is in engagement with the first gearing wheel.
1. A method for controlling an actuating device for a bicycle wherein the actuating device includes a static element which is arranged positionally fixedly in relation to a bicycle frame, a movable element which is movable in relation to the static element, an electromechanical drive which provides a drive force for a movement of the movable element, and a fault detection device which detects a fault relating to the movement of the movable element, comprising:
generating a first drive control signal, in order to drive the electromechanical drive with a first level of drive power, if the fault detection device detects no fault, and
generating a second drive control signal, in order to drive the electromechanical drive with a second level of drive power, if the fault detection device detects a fault,
wherein the second level of drive power is lower than the first level of drive power but is greater than zero.
2. The method according to claim 1 , wherein the second drive signal is generated if the fault endures for a predetermined first time.
3. The method according to claim 2 , wherein the electromechanical drive is stopped if the fault endures for a predetermined second time after the second drive signal has been generated.
4. The method according to claim 1 , wherein the actuating device includes an overload clutch which is arranged functionally between a drive source of the electric mechanical drive and an output member of the electromechanical drive, and which shuts off a transmission of the drive force from the drive source to the output member if a force acting on the overload clutch exceeds a predetermined overload threshold value.
5. The method according to claim 4 , wherein the first level of drive power is configured such that, in the event of a blockage of the movement of the output member, the force acting on the overload clutch is greater than the overload threshold value.
6. The method according to claim 5 , wherein the second level of drive power is configured such that, in the event of a blockage of the movement of the output member, the force acting on the overload clutch is lower than the overload threshold value.