Newtonian Telescope Tube / Truss
thingiverse
The telescope tube for this Printonian design consists of 3 aluminum extrusions measuring 20mm x 20mm and various printed parts, specifically using 80/20 extrusion with tolerances still in progress. Key components include 3 Primary Ribs, 4 Secondary Ribs, and 2 regular Ribs, supplemented by additional Rib pieces if necessary for structural support. The tube maintains a cylindrical shape when wrapped, helping to keep distractions off the primary mirror, while the inside can be lined with black felt for reflection control. Assembly involves 3mm cap screws in self-tapping holes, requiring careful torque to avoid stripping. Extrusion lengths depend on the focal length and diameter of the primary mirror, with a sample 114mm/900mm setup requiring approximately 1m pieces each.
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