Simple AOI

it suppose to be a simple AOI machine. controlled by marlin and a windows base software. Model is old and a mess and there's lots of design flaws on it . It's something to learn how not to design a CNC! Extruded profiles are not accurate and straight. plates which bearings are installed on them, are grinded .yet they were warped! Motors are too small and very noisy . I build Rib4 by sheet metals which has terrible tolerances!!! Seriously ...Don't build it