SOS devmonkey!
I've got together with John McNamara to implement his great mechanical design. I need to level long lengths of RHS for several router?laser projects. We are ready to cut and assemble the first two units for John and myself.(I live several hundred kilometres away) But... where is devmonkey? We are hoping he could make his great (but to me impenetrable) program output the wire zero to a physical output. We are hoping to use his code for 2 cameras on a rPi which could be used as a reference for a simple mach3 controller routine. If you are out there we would really appreciate your help.
I have come across a paper (Oleg Borisov) that uses a cheap slotted photodetector to produce some impressive accuracy that I may be able to reproduce, but the webcam seems to me the best option.
Hope to hear from you devmonkey.