Motor encoders
From emboxit
Magnetic encoder IC: • No complicated mechanical work to attach the encoder to motor • Not depended on hard to find and expensive motor/encoder • Use any motor you like (even a motor from children’s toy) • Easy for higher quantity production • Easy to prototype and finalize successfully an innovation voucher There are many options, mostly from AVAGO and AMS The one below is very attractive due to: • Classic incremental quadrature encoder output A,B and Index (resolution 90p/r) o Can be used with many available motor controllers or chipsets (like Avago…) • PWM output. Can be used to create analogue PID loops. Economic, simple, no CPU, good to teach • Step mode with step and direction outputs: o Easy to interface to CMOS 4000, or TTL 74 series counters, teaching digital electronics…up-down counters… o Selectable 24, 60, 90, 180 pulses/rotation • Serial interface o SSI serial interface is the format of high-end encoders o 360 degrees resolution o 9-bit Rotations counter o Magnetic field strength meter 5-bits o …..more http://www.ams.com/eng/Products/Magnetic-Position-Sensors/Rotary-Magnetic-Position-Sensors/AS5132 Deciding to go with such an encoder makes the motor selection very easy (…and low cost )
