36" LED Mega-sphere

thingiverse

Printed with: Prusa MK3S+, eSun PETG, 0.20mm SPEED profile The clamps and supports are printed with 20% infill, with supports for the hex nut indents; they got a bit mucky without it 2 x sphere mounts -36in - top half (177g, 14hr for one) 2 x sphere mounts -36in - bottom half: (267g, 18hr for one) 4 x sphere mounts -36in - clamp: (10g, 54min for one) A single rib of the sphere has 23 standard bullet pixels on it and requires: 5 x pixel clips - 36in - four pixels 1 x pixel clips - 36in - three pixels 1 x 72" long 1/4" steel rod, cut to 53 1/4" long; 18 3/4" off cut is left, keep this for a 12" sphere. I bought these in 304 stainless from Online Metals.com; it is probably cheaper to get them locally. Arc the 1/4" steel rod using a ring roller (Harbor freight one does just fine); arc to 36" diameter. Print these in the shown orientation with NO supports and with a brim (otherwise they won't adhere well). Filament for a rib is 159g, 17hr print time Print 32 ribs. Assembly of hubs: One of the clamps is secured to the bottom half piece using machine screws and hex nuts. As shown in "clamp orientation", #6 machine screws and nuts can be used to secure the top and bottom pieces together (if desired) for extra clamping strength along the center. The hub slips on to a 3/4" EMT conduit and #6 machine screws and nuts are used to secure a clamp piece to hold the hub in place on the EMT conduit. Keep all the outer machine screws as loose as possible so that you can easily slip the arcs in both ends. Once they're all in tighten all the machine screws snug so that the arcs are clamped in securely.