Cartesian style CNC with a working area of around 360mm x 360mm x 120 mm (X, Y, Z) using Linear rails and ball screws. The linear rails are (Hiwin?) HGR 20mm x 520mm and the ball screws are SFU1204 (12mm lead 4mm) of around +/- 430 mm. The base structure is made from rectangular aluminum profiles of 70mm x 45mm x 3mm (thickness of walls).