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8-inch F5 Newtonian Astrograph
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Making the Mirror Cell
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The hardware just arrived. For lack of experience building mirror cells I ordered two different sets of compression springs to feel them out. One set is substantially stiffer than the other, but both are fully capable of lifting the combined weight of the upper plate plus mirror at as little as 0.25" of deflection.
Pictured from left to right (top row first):
1/4-28 stainless knurled thumbscrews, 1.75" shank (collimation bolts)
Stainless compression springs, 1.5" long, 0.375" OD, 17.68 lb/inch
Stainless compression springs, 1.25" long, 0.6" OD, 37.49 lb/inch
1/4-20 stainless knurled thumbscrews, 1.5" shank, (locking bolts)
8-32 stainless socket-head machine screws, 0.75" shank, (mounting bolts)
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All projects on Shareaproject.com are user-submitted and should be used for reference information only. The projects are not intended to be complete "How-To" articles. Use the information contained in these projects at your own risk. Projects are not checked for completion, accuracy, or safety and therefore cannot be guaranteed in any way.
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