He got his hands on some motors to drive the build platform but it doesn’t have a built-in encoder. He knows that optical encoder wheels can have problems due to dirt and grim as well as ambient ...

and an optical detector to "read" slot patterns as they pass in front of the LED light source. Encoders may detect both the speed and direction that an encoder disk or strip is moving and return ...

In the video after the break [365 Robots] takes us through the build process of a closed-loop motor with a custom optical encoder. The motor’s body was printed from ABS to withstand the heat ...

Analog and digital optoelectronic sensors combine an LED and an optoelectronic integrated circuit in a compact package to enable optical encoders to provide absolute or incremental position ...