Based on the amazing AS5134 chip, this encoder supports 76875 RPM, 360
CPR/counts per revolution (with 4x decoding) quadrature rotational
encoding. It senses the position of a two pole radially magnetized disk
over a full revolution using a hall effect sensor array. The sensor
signal changes are converted to a digital quadrature signal, and the
position information stored as absolute position data on some registers,
which are readable through a 3 wire synchronous serial interface.
Standard quadrature Index, A and B phase signals are also generated just
like any standard encoder.
- 76,875 RPM (!!!)
- Non-contact magnetic sensor.
- No need to mechanically attach to a shaft, just epoxy a small magnet in place. Great for motors with one shaft.
- Alignment isn't critical. As long as the magnetic field is generally over the chip, within 1/2 inch, it will work quite well
- The onboard LED indicates that the board is powered, and provides easy testing the alignment of the IC with respect to the magnet.
- Multiple connection / cable options are supported.
- Standard Quadrature A and B phase outputs, as well as several digital modes.
- Fairly low resolution: 360 positions per revolution (1 degree). Honestly, that just helps the PID controller manage higher RPMs. For most applications 360 is plenty. Steppers are 200 to 400 in the real world, as microstepping is NOT positionally accurate.