Why is the Tachometer Not Moving?

[DeCamilla]

The reasons why the tachometer is not moving: 1. The flexible shaft connection inside the tachometer is broken; 2. The tachometer needle has fallen off or is stuck; 3. There is a foreign object inside the instrument panel; 4. There is an issue with the wiring inside the tachometer, such as aging or burning out. The solutions for a non-moving tachometer are: 1. Replace the flexible shaft connection inside the tachometer; 2. Reinstall the tachometer needle; 3. Clean the foreign object inside the instrument panel; 4. Replace the wiring inside the tachometer. The tachometer is an instrument used to measure the engine's speed and is one of the essential tools in the mechanical industry, used to determine the motor's speed, linear velocity, or frequency. The tachometer receives digital pulse signals, processes them, and directly reads them into the CPU's counting port. The software then calculates the speed and the corresponding position of the needle. Through the CPU's control port, the signal is amplified to drive the stepper motor to rotate in positive or negative directions, indicating the corresponding speed value.