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Electromechanical

Educated Guessing Games

Engineers can't know everything, but with the approximation techniques described here, we can fill in the blanks. Engineering is often a guessing game. Radar, high…

Look Ma, No Hands!

Not all systems have position or velocity sensors. In those cases, consider using a stepper motor to effect sensorless control. In my most recent columns…

Tracking Demodulation

High resolution encoders are expensive, but alternatives exist. You can develop a high-resolution system using a sinusoidal encoder or resolver. Last month, we covered some…