The STL files and code for the control box of the XYZ macro rail described in my blog are now available at https://www.thingiverse.com/thing:5146275 and https://github.com/pgmobbs/Gigapixel-MPFR. I would reiterate that I cannot help further. It is a fairly advanced project requiring some knowledge of C++ and the use of Arduino’s. There is huge room for improvement of the code. In particular, it needs rebuilding using a stepper motor library rather than as at present with crude direct control of the EasyStepper boards. I would be very pleased to see someone rewrite the code. If someone does, please send me your changes! However, as it is the code works and allows the features described in the 3 articles on it in my blog (above – use the search facility).
petermobbs 