13-6
13. CIRCUIT DESCRIPTIONS
13-6. MOTOR TACHO INPUT SYSTEM
Function
- Detects the current RPM of the motor and controls the output.
Description
- The motor TACHO sensor is connected to CN10 B-pin.
- According to the current RPM of the motor, a square wave is applied to pin 8.
- The square wave that is input to TR2 BASE turns the motor on if high (5V), and turns it off if low (0V). And this operation
will be inverted to TACHO NET for a clear wave with no noise.
- The signal is applied to MICOM pin 13. Then MICOM counts the frequency of the input signal and detects the current
RPM of the motor.
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