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| My Space Invaders Telescope |
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| jasonbar:
Thanks. We didn't get too hardcore. Here's a rough breakdown of the materials: - cardboard sonotube - lots of 3/4" wood (a 4'x8' sheet is plenty) - lots of primer & paint - lots of wood screws & machine nuts/bolts - 6 screw-on feet for base & back of tube - 3 teflon pads (machined) for base turntable - 1 sheet of smooth linoleum sheet to bear on 3 teflon pads for base turntable - 4 teflon sheet squares (cut from sheet) for pitch bearing cradle - 2 machined Aluminum rings for pitch bearing surfaces - edge molding to protect ends of tube - 3 big & 3 little springs for mirror mounts - 4-legged aluminum spider to hold small 45-deg secondary mirror on "top" end of tube (machined) - primary & secondary mirrors (purchased--about $190) - focuser (purchased $40) - 2 eyepieces (purchased, $40 ea.) - Telrad target (purchsaed, $40) - laser collimator to adjust mirrors (purchased, $75) So, just some basic woodworking skills w/ careful measuring (heck, you should see how sloppy I got in places, and as long as the mirrors still line up, it doesn't matter!), a few parts that require a machine shop if you want to do them nicely, and a few purchased parts is all you need, plus some know-how (which I didn't have, but I knew somebody with it!). -Jason |
| Green Giant:
So now the hot neighbor only thinks you are playing video games instead of watching her? Nice... |
| Bones:
--- Quote from: jasonbar on November 12, 2007, 12:37:50 pm ---Thanks. We didn't get too hardcore. Here's a rough breakdown of the materials: - cardboard sonotube - lots of 3/4" wood (a 4'x8' sheet is plenty) - lots of primer & paint - lots of wood screws & machine nuts/bolts - 6 screw-on feet for base & back of tube - 3 teflon pads (machined) for base turntable - 4 teflon sheet squares (cut from sheet) for pitch bearing cradle - 2 machined Aluminum rings for pitch bearing surfaces - edge molding to protect ends of tube - 3 big & 3 little springs for mirror mounts - 4-legged aluminum spider to hold small 45-deg secondary mirror on "top" end of tube (machined) - primary & secondary mirrors (purchased--about $190) - focuser (purchased $40) - 2 eyepieces (purchased, $40 ea.) - Telrad target (purchsaed, $40) - laser collimator to adjust mirrors (purchased, $75) So, just some basic woodworking skills w/ careful measuring (heck, you should see how sloppy I got in places, and as long as the mirrors still line up, it doesn't matter!), a few parts that require a machine shop if you want to do them nicely, and a few purchased parts is all you need, plus some know-how (which I didn't have, but I knew somebody with it!). -Jason --- End quote --- Thanks man! :) |
| mountain:
Excellent work! I like the attention to detail. |
| danny_galaga:
love it! just so happens im building a space invaders cab. where did you get the artwork from? i have some but i seem to be stuck on the front of the cab where the coin door goes... |
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