| Project by JerryL | posted 945 days ago | 699 views | 1 time favorited | 11 comments | ![]() |
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This is my most recent telescope project. It started because I’ve always wanted and Edmund Astroscan. When I finally could afford one I decided to build one instead. I used a model car finish in place of natural because I needed to paint the acrylic globe with something, and how many times in life to you get to color something metal-flake blue?
The first picture is of the complete scope on it’s “bucket” mount. The next two show most of the internals that are used to support the mirror and the poles for the ring that will hold the secondary mirror, focuser (the place where you look) and the finder.
As a woodworking challenge imagine putting together a spherical puzzle that needs to contain an adjustable platform that is accurate to within a fraction of an inch. The key to that isn’t in the construction tolerances but in some spring loaded 1/4-20 screws that allow everything to be tilted to make it all line up.
I’d also like to add a plug for my favorite component site, McMaster-Carr. It’s like having the biggest hardware store in world right down the street.
Thanks,
Jerry
-- Jerry L.
































11 comments so far
woodspar
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705 posts in 998 days
posted 945 days ago
Jerry, Again, thanks. This is great. I also have thought of purchasing an astro-scan. It is great to see that you have created your own. Nice work! My ATM project right now however is an eight inch Dobsonian. I have ground the mirror and now I am at the pitch/polish stage. Instead of the straight dob mount I have thought of making a split ring instead.
-- John
Bob Babcock
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1808 posts in 985 days
posted 945 days ago
Very nice…...now all you need to build is the observatory….
-- Bob, Carver Massachusetts, Sawdust Maker http://www.capecodbaychallenge.org
Dick, & Barb Cain
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7045 posts in 1198 days
posted 945 days ago
Very nice, looking at the third image, it looked like the wood was on the exterior of the globe, until I enlarged it. Optical illusion ?
-- -** You are never to old to set another goal or to dream a new dream ****************** Dick, & Barb Cain, Hibbing, MN. http://www.woodcarvingillustrated.com/gallery/member.php?uid=3627&protype=1
MsDebbieP
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14174 posts in 1059 days
posted 945 days ago
amazing. You must be pretty excited—I mean, metal-flake blue!!! ;)
quite the creation.
-- ~ Debbie, Canada (http://www.execulink.com/~yohan)
oscorner
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4572 posts in 1209 days
posted 945 days ago
That is a very interesting project.
-- Jesus is Lord!
JerryL
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38 posts in 946 days
posted 945 days ago
Thanks for the comments. It’s almost a shame that the inside is painted flat black. No one can see the components :-(. On the filp side it get’s used when it’s dark anyway.
Dick, you are right about the optical illusion. The camera had a tough time with the clear globe.
-- Jerry L.
Napaman
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3492 posts in 976 days
posted 945 days ago
wow…talk about the precision need to make this…amazing! how well does it work? were you pleased with the results in terms of making your own vs. buying? i never took an astronomy class in college…but when I get away bckpackng in the summers i cant wait to see the stars without city lights…very cool project.
-- Matt, Napa, CA...fun is beautiful...just trying to have some fun...
dbkmd
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19 posts in 976 days
posted 945 days ago
Very Cool!! Now that you’ve got me hooked, where can I get the plans? Does McMaster-Carr have them, or just the components? I’ll check them out. Thanks for sharing this.
David
JerryL
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38 posts in 946 days
posted 945 days ago
Precision, yeah, that’s what it’s called… Actually a little relative dimensioning and a some felt applied before assembly makes sure it all fits nice and snug ;-). The cool thing is that there are only six screws in the whole thing. Four through the top ring into the spars and two in the bottom ring just to make sure it’s held to the spars. No glue.
As far as functionality, I still don’t have the mirrors. They have been on order since January :-(. I’ll make sure to follow up with a first light report after they arrive.
David, as far as plans, it’s an amalgamation of designs based on some reasearch done through the Yahoo group called “roundscopes”. A quick Yahoo group search will turn it up. I’d say do some reasearch first on basic telescope design before you start something like this. And get good at cutting circles! I can send you a few more pics and more ideas if you want. Send me PM if you are interested.
Finally, McMaster-Carr is an industrial parts supplier. You name a part, thing, or gadget and they have it. The trick is knowing which gadget to get :-).
-- Jerry L.
David
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1982 posts in 1037 days
posted 942 days ago
What an interesting project! Well done. Thanks for the McMaster-Carr link – always good having resources for components.
-- http://foldingrule.blogspot.com
mcoyfrog
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824 posts in 493 days
posted 221 days ago
Wow intense
-- Wood and Glass they kick (well you know) Have a great day - Dug