My first Homemade Universal CNC Machine RAMPS 1.4 (3D printer) Универсальный ЧПУ Станок Самодельный

365x305x180 mm Work Area Arduino mega 2560, RAMPS 1.4, А4988 (changed to dvr8825 and some problems solved), LCD12864, Marlin , NEMA17 stepper motor, 12mm Rail and linear bearing good for 3D printing and plotting (recomended 16-20 mm for routing an cutting), Dremel, Repetier-Host, ArtCam And here are some problems