I am currently thinking about building myself an Arduino controlled CNC machine. I know there are several DIY CNC machines out there utilizing printer hardware, stepper motors etc.
What I haven't seen so far is a feedback system about the actual position of the drilling head.
Adding a few sensors shouldn't be that hard but the question is if their resolution would be precise enough to calculate the exact distance of the drilling head down to the sub millimeter range (at least 0.01 mm).
Has anyone ever tried to realize such a precise measurement system? What kind of sensors did you use?
Thanks a lot in advance! Have a nice day :) Tom