Talk:Microstepping with optical feedback

why are you sampling inputs during a timer interrupt when you could use interrupt-on-change or even the counter subsystem? - Triffid Hunter

Have you considered try this setup with a mouse optical sensor mounted on the carriage measuring the surface of the axis rod? the [[1]] sensor has quadrature pins (like most of these days optical mouse sensors) and should act just like the linear encoder. Would be interesting to compare that with the printer-hacked-linear encoder to check how much precision a mouse sensor could get!! ADNS2051 have a maximum of 800DPI, which should give a response of 31.75 microns per measurement. Later revisions can go up to 8000DPI, or 3.175 microns (which is just crazy!!) Hradec