Joy of Mirror Making: Rough Grinding BBAstroDesigns. 31 · Grind with the tool on top in a to and fro pattern, overhanging each end by about 1/6 the. MIRROR DIAMETER 25 3 35; 4: 0100: 0083: 0072: 6: 0150: 0125: 0107: 8: 0201: 0167: 0143: 10: 0251: 0209: 0179: 31 ...

Joy of Mirror Making: Rough Grinding. Rough grinding a telpe mirror. E. Edward. Telpe Making. Minas Gerais. Observatório Astronômico. Domo Geodésico. Festa Da Estrela. Kit Casas. Projetos Legais De Faça Você Mesmo. Construção De Uma Casa. Pontões. Madeira. Building Lone Star Observatory III. C.

The Joy of Mirror Making Mel Bartels. Introduction Rough Grinding Fine Grinding Polishing

Optics: Spider and Secondary Mount. The spider and secondary mount began straight from the stellafane site but evolved as I chatted with my expert advisors. The mirror is mounted to a length of dowel. A bolt runs up the dowel and out and through a hub that is a milled cube of aluminum. The corners were milled out of the cube; so that from above ...

How to Make Your Own Telpe Mirror: [Fig 1] This is a large piece of glass a woman off Craigslist gave me. It was 40"x40" and 0.75" thick. Its what I decided to use to make the mirror. Cutting it into smaller sections can be difficult but scoring it with a glass cutter …

Rough grinding. This step is about making one side of the glass concave. It will give your mirror its overall focal ratio. If you make the centre deep, you will end up with a fast telpe (e.g. F/D = 4) well suited for deep sky observations. On the opposite, a shallow mirror (e.g. F/D = 8) will be performing very well on planets and the moon.

Instrument Making Section. This Section is one of the oldest in the Society, and could also be known as the 'Telpe Making Section'. Its prime purpose is to provide a wealth of knowledge and experience to any member who wishes to construct an instrument which …

Polishing is the stage of mirror making that requires the most physical work, even more than rough grinding. What probably concerns you most is how much time it will take you to polish the mirror. Using the techniques described below, a 16" porthole takes about 10 hours to polish out with a full lap.

How to Make Your Own Telpe Mirror: [Fig 1] This is a large piece of glass a woman off Craigslist gave me. It was 40"x40" and 0.75" thick. Its what I decided to use to make the mirror. Cutting it into smaller sections can be difficult but scoring it with a glass cutter …. graavan. G. Peter Kraus.

Joy of Mirror Making: Rough Grinding. Rough grinding a telpe mirror. E. Edward. Telpe Making. Stargazing Telpe. Diy Telpe. Radio Astronomy. Space And Astronomy. Science For Kids. Science And Nature. Life Science. Cosmos. Curiosity Rover. The Simplest Way To Prepare A Diy Telpe Most Inexpensively.

Finally work as slowed down just enough that I could slip away on Tuesday (10/29) to check in at the mirror grinding workshop. I brought my blank along. I consulted about how to start, and as a result I decided I should build a box to store the mirror and tool in and, before making…

Joy of Mirror Making: Rough Grinding - BBAstroDesigns. Rough Grinding. The first milestone is putting a curve into the mirror face. The curve's depth dictates the mirror's focal length. The curve should be spherical. Creating the curve can be done by several methods: The curve is ground into the mirror face using a grinding tool.

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Gordon Waite sets up his fixed-post mirror grinding machine to begin rough grinding on an 11 f/4.3 telpe mirror. He uses a grinding tool made from dental plaster and steel pieces to speed up grinding. Gordon shows the setup for spin grinding at high speeds and with added weights to get the job done as fast as possible.

Joy of Mirror Making: Rough Grinding Saved by Gerry Germishuizen Telpe Craft Radio Astronomy Aficionados Cnc Projects Grinding Joy Mirror Collages Log Projects

Joy of Mirror Making: Rough Grinding. Glass tools can stick and cause scratches in larger sizes. More importantly, the glass tool can be saved and used later as a mirror blank for a second project. Grinding Stands. I use an old printer stand. Here is a 25 inch [635cm] mirror being rough ground followed by a beautiful grinding stand from the ...

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The Mirror: Grinding, Polishing, Figuring. In regular visits through the winter I began the grinding, polishing, and figuring the mirror blank to astronomical standards. After forty-five hours of my "pushing glass," the experts declared the mirror finished once it reached 1/6 wavelength through Foucault testing.

The I.A.U. named asteroid 17823 Bartels discovered 1998 by J.M.Roe in recognition for my contributions to amateur astronomy. Making is the Key to Knowing. A telpe mirror is arguably the most accurate surface made by human or machine. Amazingly you can grind a mirror by hand and make a telpe with simple hand tools.

Mirror Grinding at the Spring 1998 Stellafane Mirror Workshop in the McGregor Observatory Rough Grinding. The purpose of rough grinding is to start to cut a spherical concave surface into the mirror blank. For a 6" mirror with a 48" focal length, the depth of the curve is 0.047". A full sized tool is rubbed against the mirror blank, with a wet ...

How to Make Your Own Telpe Mirror: [Fig 1] This is a large piece of glass a woman off Craigslist gave me. It was 40"x40" and 0.75" thick. Its what I decided to use to make the mirror. ... Joy of Mirror Making: Rough Grinding. Rough grinding a telpe …

DIY Mirror Grinding and Telpe Making - Google Sites. To ensure that the mirror or tool edges won't chip during grinding, the edges of the mirror and tool must be beveled. I regret not requesting the factory do this job. Hours were spent with a grinding stone trying to get all the edges to about 1/8" wide.

31 The Joy of Mirror Making Mel Bartels Rough Grinding The first milestone is putting a curve into the mirror face. The curve's depth dictates the mirror's focal length. The curve should be spherical. Creating the curve can be done by several methods:

A good starter size is the 150 mm (6") mirror. A 200mm (8") will also work. Most ATM books and websites recommend a Pyrex® mirror blank, but in my opinion, annealed plate glass is better for this first, "learn and practice" mirror.It is cheaper, it is softer and grinds faster, needing less abrasives and with these small sizes, the low expansion glass like Pyrex has no practical (visible at ...

After hogging the mirror blank to depth, the rough grinding stage begins. In this video I am grinding with 60/90 grit. The wets are lasting about 90 second...

Joy of Mirror Making: Rough Grinding Ceramic tiled tool ground against the mirror face. Glass tool ground against the mirror face. ... Mirror grinding - Scope Making One as the mirror, and the other as the tool. If you have such a kit, save the second glass, and make a tile tool.

Mirror grinding scope making. · A good starter size is the 150 mm (6") mirror. A 200mm (8") will also work. Most ATM books and websites recommend a Pyrex® mirror blank, but in my opinion, annealed plate glass is better for this first, "learn and practice" mirror.It is cheaper, it is softer and grinds faster, needing less abrasives and with these small sizes, the low expansion glass ...

Joy of Mirror Making Fine Grinding bbastrodesigns. Fine Grinding The goals of fine grinding are to prepare the curved mirror face so that it is ready for polishing and figuring and make any adjustments of the focal length Previously in rough grinding we deepened the center of the mirror s face either by grinding with coarse grit and a tool slumping in a kiln over a mold or purchasing the

The goals of fine grinding are to prepare the curved mirror face so that it is ready for polishing and figuring and make any adjustments of the focal length. Previously in rough grinding we deepened the center of the mirror's face either by grinding with coarse grit and a tool, slumping in a kiln over a mold, or purchasing the glass pre-generated.

🔭🔭🔭🔭🔭🔭🔭🔭ATM - Amateur Telpe Making in INDIAFor those who are passionate about learning How to build their own telpe https://t.me ...

-Ed 5/29/00) Chapter One: Rough Grinding, May 28, 2000 I arrived on a cool Sunday afternoon in May, and started grinding with five other club members in a local barn. Right away, there was pressure on me; I had missed the first two-hour grinding session and everyone was well ahead of …

In this video, I continue the rough grinding of the primary mirror for my Buchroeder Quad Schiefspiegler telpe. I have decided, against the advice of my ...

Stellafane ATM: Rough Grinding. This page describes the rough grinding process Before You Start Use this checklist to make sure you are ready to start rough grinding: You have selected a mirror diameter and focal ratio, and have use these to calculate a target sagitta; You have a way to measure sagitta; You have an appropriate size mirror blank, you have selected a surface to grindTo Grind a ...