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Friction-free Angle Measurement

a magnetic shaft encoder using the Hall effect

Friction-free Angle Measurement
Measuring angles has until now involved a choice between potentiometers and optical encoders. Potentiometers are inexpensive, but have the disadvantages that they require calibration and create friction; optical solutions, although offering high accuracy and long-term stability, are mechanically more complicated and considerably dearer. In this article we describe a modern semiconductor-based solution: a magnetic shaft encoder using Hall effect sensors.
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