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Measure actuall RPM of a DC Gear Motor with Encoder(Quadrature Hall Effect)

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twinsratio

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Hi there,

I'm doing a dc motor speed controller project and I actually want to measure the actual rpm the motor is running.

Motor details as follow:

DC12V
Output Power: 1.1 Watt
Rated Speed: 185RPM
Rated Current: 410mA
Rated Torque: 78.4mN.m
5V Quadrature Hall Effect Encoder - Monitoring the position and direction of rotation
Resolution of the encoder output:
12 counts per rear shaft revolution
240 counts per main shaft revolution

My question here is how to measure or how can I compute the actual rpm of the dc motor,what is the formula?.


Thank you.
 

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