Carbon fiber magnetic ball joint jig for the Cerberus, Cerberus Pup, and other Rostocks

This jig is used to make consistent length magnetic ball joint arms for the Cerberus, Cerberus Pup, and other Rostock deltabot printers.

Requirements:

1. 3/8" steel ball bearings

2. 3/8" x 3/8" cylindrical neodymium magnets

3. Carbon fiber shafts, such as arrow shafts

4. High-strength glue capable of bonding metal to carbon fiber (I used Loctite Metal / Concrete epoxy, others have used JB Weld)

Print two and mount them onto a length of wood at appropriate distances using screws.

NOTE:

• The provided STL uses a 7.28mm diameter carbon fiber rod in the model. If your CF rod has a different diameter, download the SCAD and edit it in OpenSCAD, adjusting the cf_rod_dia variable appropriately.

• Assembly instructions are in the Instructions section.