Carriage for Kossel Mini (replaces ball rails)
thingiverse
Construct a Kossel Mini Cerberus-style carriage with Graber Dual 623 V rollers for an affordable alternative to official ball rails. This option is ideal when the OEM ball rails are unavailable, too expensive or not long enough. The Cerberus Pup-style carriage features an OpenBeam design that allows smooth motion at a cost of around $70 for three units. It also supports an unmodified Kossel ball joint adapter since its 20x20 m3 grid matches the spacing on the official Kossel Mini ball rails. To assemble, you'll need 3x Graber Dual 623 V rollers per carriage, along with various screws and nuts. Print at low-to-moderate infill (30% with 3 perimeters is sufficient), drill holes for the rollers and fasteners, attach the rollers and wheel bearings, then secure the Kossel Mini ball joint adapter to complete the installation. The total weight of the assembled carriage, including rollers, screws, and nuts but excluding the ball joint adapter and screws, is approximately 36g.
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