Cherry Pi Delta 3D Printer

thingiverse

Cherry Pi II details were released on April 13, 2014. It is an improved version of various 3D printer designs like Kossel, Delta Pi, 3DR, and Rostock. The designer expresses gratitude to the original designers for their innovative ideas that he incorporated into his design. The printer's rods are 277mm long with steel ball centers. It has towers made of 800mm Bosch/Rexroth aluminum extrusion, and the base and top frame extrusions are 250mm long each. You need nine such extrusions in total. Each bearing carrier uses six 623 10mm x 4mm x 3mm bearings that slide directly on the extrusion. These carriers also have nut traps for M3 nuts. The rods attach to the carrier with a plate fastened by three M3 bolts, again with nut traps included. The rod carriers and effector plate hold 10mm x 5mm countersunk, cylindrical rare earth magnets. The rod end balls are 8mm in diameter, and the rods are 5mm carbon tubes but can be replaced with 6mm aluminum ones. An update from January 3, 2014, altered the delta rods and attachment mechanism as well as designed a new effector plate. The designer used 10mm spherical neodymium magnets and modified M5 socket head cap screws with a 10mm ball end mill in his pillar drill. The magnetic attraction between the new spheres and the 'cups' is four times stronger than the previous version. He posted images of the new design along with the .stl file for the new effector plate. In February 21, 2014, there was another update due to issues with idler bearing belt guides that disintegrated. The designer provided a modified design on the 'files' section. Andy is the person behind these updates.