Linear encoders FTW!
June 20th, 2009
Nestled under each positioning stage is a linear optical encoder strip salvaged from a used printer. This first mill is not meant to be accurate to 0.001″ (more like 0.0025″ at the very best,) so the relatively low resolution of these strips should not be a problem. The readings are now satisfactory through the full range of travel. Of course, I need to add limit switches, but that can wait a bit. The next step I’m taking is prototyping the microcontroller board to interface with the motors and sensors.
