WEBMirror thickness is also a consideration. Thicker mirrors will tend to hold their shape better during grinding as they are just more stable overall (resulting in less likelihood of making them astigmatic), but the downside is thick mirrors are an absolute asshole to thermally acclimate at night, and they won't perform well if they're too thick.
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WEBMay 8, 2024 · Use the aggressive chordal stroke he describes for rough grinding, but with mirror below the tool. Also pay careful attention to what he writes in regards to approaching end of rough grinding and progressing to the smoothing and fine grinding so as to avoid non spherical shape and consequent issues with seizing and/or turned edge.
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WEBJoy of Mirror Making: Rough Grinding. Rough grinding a telescope mirror. Richard Burns. Sumerian. Lager. Scopes. Experience. Experiences with Sumerian Alkaid and Canopus 16inch Telescopes Reflectors Cloudy Nights.
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WEBFor grinding the back of my 12" mirror, I used an 8" disk of 3/4" particle board, glued tiles to the front with epoxy, and coated the back and sides with polyurethane. It worked great. I made my polishing tool for my 12" mirror out of three layers of 3/4" particle board glued together. I used a chisel and a belt sander to put a curve on the ...
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WEBJan 25, 2024 · Grinding and Polishing the Mirror. Once you've appropriately set up your workspace, one of the most critical steps in DIY telescope mirror crafting is grinding and polishing the mirror. This process involves removing material from the mirror's surface to achieve the desired curvature, and subsequently achieving a smooth finish for the ...
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WEBMaking a mirror thinner leads to problems keeping it properly supported so it doesn't sag out of shape. The mirror cells get really complied, and sometimes the mirrors sag anyway. ... Rough grinding is complete for the .
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WEBJoy of Mirror Making: Rough Grinding. Rough grinding a telescope mirror. Richard Burns. Quantum Mechanics. Deep Space. Design. Gadgets. Dobson. Electron Microscope. A homemade 20 inch dob lightweight telescope, DS5. Description and design of an ultra lightweight dobsonian telescope. / Mark Moraes. The Kiln. How To Make Light.
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WEBStellafane ATM Main Page. Amateur Telescope Making Main Page. Russell PorterGrinding a Mirror. "For it is true that astronomy, from a popular standpoint, is handicapped by the inability of the average workman to own an expensive astronomical telescope. It is also true that if an amateur starts out to build a telescope just for fun he .
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WEBThe back had to be ground to a spherical shape, the edges beveled and the front rough grind back to This took months of hand grinding. Here you can see the grinding of the mirror's back in operation, along with an initial flash grind of the back showing that the glass was slumped fairly evenly.
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WEBJoy of Mirror Making: Rough Grinding. Rough grinding a telescope mirror. Richard Burns. Projection Screen. Rear Projection Screen. Solar Telescope. Rear Projection. Building. ... I had always thought that it would make a neat project, but the upcoming eclipse gave me a reason to continue. However, aft.
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WEBContribute to sili2023/sbm development by creating an account on GitHub.
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WEBContrast experiments were also conducted on fused silica, using the same grinding parameters; this produced only very rough surfaces, which further validated the feasibility of the proposed model. The demand for reactionbonded silicon carbide (RBSiC) mirrors has escalated recently with the rapid development of space optical remote sensors ...
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WEBMirror maker 'X's mirrors are recognizable and distinct from mirror maker 'Y'. Our personalities impact how we make mirrors. Our processes and techniques vary. That's because there are many variables in mirror making. Each mirror makers chooses to control some factors and vary others in order to achieve the desired result. The Perfect .
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WEBThe Chordal Stroke. USE: Used at the beginning of rough grinding to initially "hog out" a lot of glass and generate the initial curve in the glass. MIRROR POSITION: Mirror on Top, Tool on Bottom ABRASIVE: Your coarsest grit (usually #60 or #80) PRESSURE: Firm downward pressure will result in short wets and faster glass removal. DESCRIPTION: .
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WEBIn today's digital age, making a homemade DIY TV antenna has become a rewarding project for many. These 10 homemade DIY tv antenna plans aim to walk you through the steps of how to make your own DIY antenna, helping you to ch free overtheair television broadcasts without the need for costly subscriptions. ... Joy of Mirror Making: .
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WEBWhile a chip will not be fatal to a tool, if the glass chip falls onto the mirror while you are grinding, it most likely will leave a deep and hard to repair scratch on the mirror. You may want to put a larger bevel on a glass tool, especially if you are making a "fast" mirror. ... Bevel the edge before you start rough grinding.
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WEB25 votes, 29 comments. 132K subscribers in the telescopes community. The home to all amateur astronomers telescopes! Feel free to discuss anything.
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WEBI had always thought that it would make a neat project, but the upcoming eclipse gave me a reason to continue. ... Cnc Projects. Cnc. Grind. Rough. Joy of Mirror Making: Rough Grinding. Rough grinding a telescope mirror. Richard Burns. Documents. Nom Nom. Mechanic. Science. Wall. Document sans nom. Document sans nom / jose eduardso.
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WEBThe rough grinding usually digs a depression in the center of the upper disc which gradually deepens and spreads toward the edge of the disc. It is a fairly simple matter, by regulating the extent of overhand, to arrange to have the curve on the mirror face reach its proper depth just as the edge of the ground out area reaches the edge of the ...
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WEBThe condensed process of making a tile tool that will be used to grind my inch telescope mirror. Making a mould around the Pyrex disc, mixing and pouring...
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WEBPhoto #2 shows the mirror at the end of rough grinding. I was aiming for an f/ mirror, so the required depth of the curve is inch. Once the required depth is reached, the rough grinding is complete. Amazingly, the rough grinding has removed over a pound of glass. The mirror now weighs in at only only 8 pounds 15 ounces.
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WEBYou'll need to do a number of wets to get through rough grinding. What we are doing here is simply shaping the mirror to the desired sagitta, then the rest of the work will be progressively making the surface of the mirror smoother and smoother. The video shows about 30 minutes of this process on another mirror that I'm making for my nephew.
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WEBDec 11, 2021 This Pin was discovered by John Voysey. Discover (and save!) your own Pins on Pinterest
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WEBFeb 3, 2018 · Delmarva is unique in that in 34 days most go home with a finished mirror, from rough grinding to well figured. because of the teachers and null testing used they are able to finish mirrors in just over the weekend.
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WEBYou've already forked sbm 0 Code Issues Pull Requests Packages Projects Releases Wiki Activity
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WEBTelescope Mirror Making: Part 3, Rough Grinding Youtube . Making A Telescope Mirror With Resin Atm, Optics And Diy Forum Cloudy Nights. Part 1 of me grinding and polishing a inch telescope mirror. How to build a telescope mirror. In the beginning, a fresh mirror blank is "sanded" down to form a perfect parabolic curve, which is.
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WEBThe demand for reactionbonded silicon carbide (RBSiC) mirrors has escalated recently with the rapid development of space optical remote sensors used in astronomy or Earth observation. However, RBSiC is difficult to machine due to its high hardness. This study intends to perform ductile mode grinding to RBSiC, which produces superior surface .
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WEBDec 28, 2019 I know it's practical to hand grind a convex spherical mirror and that it's practical to make a concave parabolic mirror from a spherical one. But as I understand it, the procedure for doing so dep...
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