Diagonal rod for Rostock

thingiverse

The Rostock is a delta 3D printer that utilizes six diagonal rods for its structure. Initially, these rods were constructed of carbon tubes and ball joints; however, they now use universal joints, making them fully printable. The new OpenSCAD source files can be found on the GitHub repository at https://github.com/jcrocholl/rostock. To ensure proper fitment, the rod length totals 262mm (with a 250mm center distance of the universal joint M3 screws) and accommodates diagonally on an 8x8 inch or 20x20cm build platform. It may be necessary to disable the "Skirt" setting in Skeinforge, as the outline could be too large. Printing with PLA at 185°C nozzle temperature, .2mm layer height, and .5mm extrusion width, combined with a heated bed at 60°C, has proven successful on a Prusa Mendel. During printing, send M106 to activate fans for cooling, preventing potential layer adhesion issues. Afterward, turn off the heated build platform and let it cool completely before removing the rod to prevent bending. To install the rods, no predrilling should be necessary if the printer is properly calibrated; however, a 3mm drill bit can be used as a backup option. Ensure screws are tightened for zero backlash. If the build platform is too small, print rod ends from joint.scad instead and connect them with kite store-purchased carbon fiber tubes.