Rostock Style Printable U-Joint Carriage For Kossel & Mini Kossel

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I took the original Mini Kossel carriage and swapped out the traxxis ball joint mounts with Rostock/Rostock Mini universal joints, which are entirely printable aside from rods and screws. I've found that they have less slop than traxxis ball joints, as noted by Johann. However, using ABS and PLA, they tend to get sloppy quickly, so nylon screws or a smooth rod fixed in place may help solve this issue. I designed several carriage styles, one for GT2 belts and four different spectra style mounts to suit your configuration or preferences. For spectra, the vertical line mount is for an adjustable line tension screw; simply use an M3 screw (10-15 mm) with a washer, put a slip knot in the spectra & snug it up to the washer & install the screw. I've also added a spot for an adjustable end-stop triggering screw, but it's best to let the top of the carriage trigger the endstop and perform all endstop offsets in software. If you need to modify any design, I've included the OpenSCAD files. If using this on the Kossel carriage, fasten with 3 * M3x20mm screws and M3 nuts to attach it to the roller truck. Use the original Rostock mini printed u-joints, jaws, and effector from the zip file attached, and follow the build instructions here: http://reprap.org/wiki/Rostock_mini#Carriage These work great with my other mod, Carriage Roller Base for Kossel & Mini Kossel w/ OpenBuilds 2020 V-Slot Extrusion & Mini V Wheels: https://www.youmagine.com/designs/carriage-roller-base-for-kossel-w-openbuilds-2020-v-slot-extrusion-mini-v-wheels Thanks to Johann Rocholl for the original source files.