Vertical carriage for Rostock

thingiverse

The Rostock 3D printer features a delta-style design, and this part specifically serves as the vertical carriage for LM8UU linear bearings and universal joints, which attach to two diagonal rods. Updates to the OpenSCAD source files can be found on GitHub at jcrocholl/rostock. To assemble, print three of these carriages and secure each to a pair of LM8UU bearings with zip ties. For enhanced horizontal constraint, consider using an LM8LUU (45mm) instead of LM8UU (24mm) on one side; however, this is optional. Next, fasten a M3x16 screw with a round head into the vertical hole to adjust or calibrate the top endstop. Pre-cutting the thread should not be necessary if your printer is correctly calibrated. Then, place four M3 nuts inside each universal joint and insert four M3x12 screws with washers through these nuts and into the joint pieces. Tighten the screws securely to prevent the delta robot from disassembling. Stainless steel fasteners are recommended for durability.