Pen Carriage LM8UU Shuttle
The pen carriage for the 'NEMA17 Cantilever Pen Plotter' kit. The 48 x 63 x 37.5 mm shuttle rides two 8 mm X rods set 40 mm apart on two LM8UU bearings, which press into 15.05 mm pockets against a stop face, and a 14 mm belt channel stays open underneath. Both GT2 belt ends pass through 1.6 mm slots in stiff lugs under the deck and fold back on themselves. The flat front face has four M3 heat-set bores on a 20 x 20 mm square for the pen-lift frame.
robotics kit pen-plotter lm8uu