Cherry Pi III

thingiverse

Update 08/08/2014: The delta rods design has been altered, replacing magnets with 8mm stainless ball bearings drilled with a 4mm diameter, 4mm deep hole. Sold for photography use on eBay. The effector and rod carrier designs now have 8mm sockets to accept the ball bearings. These are locked together using Spectra line (100lb) and springs, specifically 85mm springs with a little silicone grease applied before assembly to prevent wear. This results in a rock-solid, backlash-free connection between effectors and towers with no play at the nozzle and increased print speed capabilities. In version three of the Cherry Pi printer, mini V wheels are used for carriages, and a hot end Z probe is integrated for auto levelling and calibration. Rich Cattell's Marlin fork enables this functionality. The number of parts has been reduced, with the V wheels leaving space to mount the extruder on the Z tower, shortening the Bowden tube. Plastic parts have been renamed to reflect quantity needed and settings/materials used for printing. A centrifugal fan is now incorporated due to its increased airflow and ease of integration into the Z probe hot end design. The Bill of Materials includes plastic parts as required, 2020 Bosch/Rexroth extrusions, flanged bearings, mini V wheel kits, neodymium magnets, aluminium tubes, SHCS rod ends, GT2 belt, GT2 pulleys, micro switches, NEMA 17 stepper motors, Arduino Mega 2560, RAMPS 1.4, RRD Smart LCD Display, 4988 stepper drivers, a 12V 5A PSU, mains lead, a centrifugal fan, a build plate, J Head Bowden-type extruder, PTFE tube, pneumatic fittings, 608 bearings, M8 threaded rod, hobbed bolt, nuts, washers, SHCS and springs. Enjoy!