mirror grinding making
Woodware: Mirror Grinding Stand
Now days it is easer to buy finished mirrors than grinding kits to make them. Still grinding your own mirror is a key skill that makes you a real telpe maker. To grind a telpe mirror by hand you simply attach a glass tool the same size as your mirror blank to the top of a small, strong stand. You apply grinding compounds to the tool and ...
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From Ring Tool to Tile Tool | Telpe Building
(4) we removed the tile tool from the mold and ground the topside (non-tiled side) by sliding it (topside down) on the sidewalk outside the community center. The result is a grinding tool of the same diameter as the mirror: the tiled side has the same curve as the mirror, and the topside is …
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Making a Tile Tool for Mirror Grinding (in 150 seconds ...
The condensed process of making a tile tool that will be used to grind my 8.5 inch telpe mirror. Making a mould around the Pyrex disc, mixing and pouring...
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telpe mirror grinding / polishing machine with ...
The machine is shown grinding a 300 mm mirror.How to build a tachometer:
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Stellafane ATM: Mirror Making Overview
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 ...
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How to Make Your Own Telpe Mirror - Instructables
After your finished with fine grinding the mirror you will need to make yet another tool. This tool is called a pitch lap. It is made the same way as the penny tool you made to do the fine grinding except instead of pennies you will use "Pitch". [Fig 6] Here is a photo that shows the …
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Joy of Mirror Making: Rough Grinding - BBAstroDesigns
31 Here is a 25 inch [635cm] mirror being rough ground followed by a beautiful grinding stand …
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The Mirror: Grinding, Polishing, Figuring | Telpe Building
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. I sent the mirror …
ادامه مطلبLarge Thin Mirror Making - BBAstroDesigns
Make a polishing tool from plaster like we did for fine grinding of at least 1/2 the mirror diameter. Let it dry thoroughly, and seal with water sealer or something similar. By using a tool of this size, we avoid astigmatism, and produce a zone free surface, absent of roughness so typical of small tools.
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Mirror Grinding Machine | Hackaday
Mirror Grinding Machine. The true test of the amateur astronomer is building their own telpe. Grinding and polishing your own mirrors is a long, arduous process. Instead of lapping the blank ...
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Telpe Mirror Making: Part 3, Rough Grinding ...
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.
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TELPE MIRROR MAKING HOW TO: Fine Grinding - YouTube
In this video I am showing you how to make a DIY telpe mirror! This is the second part in the series, showing fine grinding in a step by step tutorial.
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GRINDING – Astro Khan Telpe Making
Grinding is the first step to make the mirror. You remove glass from Mirror blank and hollow it to a concave shape. Once you have the grinding post set, you can start grinding the mirror using the following options. Use the tool to rub the mirror over it by using various kinds of strokes ;
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Telpe Mirror Blanks / TelpeMirrorBlanks ...
* Thin plate glass mirror blanks are lighter than standard mirror blanks, which allows you more flexibility in designing your telpe tube assembly and mount. * When grinding a telpe mirror, you will find that plate glass takes less time to grind and polish than a mirror made from borosilicate glass. Please see the Buy Telpe Mirror Blanks
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53 Telpe Mirror Making ideas | telpe, telpes ...
Jun 8, 2017 - Explore Neil Aubrey's board "Telpe Mirror Making" on Pinterest. See more ideas about telpe, telpes, diy telpe.
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Grind and Polish a Dobsonian/Newtonian Telpe Mirror ...
You'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.
ادامه مطلبSkyBadger - Mirror Grinding Machine
Introduction. The mirror machine came to me as a result of astronomical horse-trading, swapping a large GEM mount and a 8" Newtonian OTA for the machine as it was and a start kit consisting of two 6" blanks and the grit, rouge and pitch to manufacture a mirror. The grinding machine had been built to the design of the mirror-o-matic design of ...
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Joy of Mirror Making: Introduction - BBAstroDesigns
A ring tool of half the diameter of the mirror used on top of the mirror's flat face with the coarsest grit will rapidly grind a spherical curve into the mirror. Grinding a 6 inch [15cm] mirror to F/2.8 using a ring tool. Mirror Making Zen. Do one thing at a time. Mirror making is a process: 1. Get blank, grit, pitch 2.
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Stellafane ATM: Pour a Pitch Lap
1. Clean: Make sure your plaster disk is clean and dry.If you are using a glass substrate or tile tool, clean the surface with turpentine. 2. Build a Dam: Using 2" wide masking tape, build a dam at least 3/4" high around the edge of the disk to hold the pitch in when you pour it. …
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Newport Glass Works, LTD. Grinding, Polishing and Figuring ...
Leaving the mirror grossly hyperbolic will make fine grinding difficult. Fine Grinding . We've all heard stories about fine grinding taking hundreds of hours. If done correctly, however, fine grinding takes a fraction of this time, and in fact, is one of the more manageable jobs in making a large mirror.
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tut44 Making A Mirror Grinding Tool - Asterism
After fine grinding is complete, the mirror must be polished. It is during polishing that you "figure" the mirror by using a different polishing stroke to change the mirror's spherical polished shape into a parabolic polished shape . See a related tutorial nearby titled, " Making A Mirror …
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Ed Grinds a Mirror
Mirror grinding is a noisy, messy, wet activity. It doesn't take up enough of your attention to fully occupy you, but it does take up just enough that you cannot do something else like watch TV, listen to the radio, etc. You're pretty much stuck there looking at your hands, and adding water or grit once in a while. ...
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All About Telpes How To Build * How To Use * Mirror ...
All About Telpes How To Build * How To Use * Mirror Grinding * Photography|Sam Brown, Sicilian Shadows|Franc Scannella, Bibel Und Natur Vorlesungen Ber Die Mosaische Urgeschichte Und Ihr Verhltniss Zu Den Ergebnissen Der Naturforschung [FACSIMILE]|F. H. (Franz Heinrich), 1825-1900 Reusch, Fanny Burney: Madame D'arblay (Classic Reprint)|Austin Dobson
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Making a Mirror grinding & Polishing machine - ATM, Optics ...
Page 1 of 5 - Making a Mirror grinding & Polishing machine - posted in ATM, Optics and DIY Forum: Hello, I am on the half of the way to make a mirror grinding machine inspired by original M-O-M design. I made the pulley arrangement such a way that, both the turn table & eccentric spins at 50 RPM fixed. I wont go for making mirror bigger that 10.5 (or max 12).
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Build your own telpe part 1: The mirror – Thomas ...
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.
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Explore how telpe mirrors are made | Astronomy
Making a telpe mirror. To start, a new mirror blank is "sanded" down to create a precise parabolic curve in a process called grinding. To do that, the blank is paired with a device called ...
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Astro-Tel - Mirror grinding machine
MIRROR GRINDING MACHINE. I made my first mirror grinding and polishing machine over thirty years ago. It used the working principle of the machine illustrated at "A" Fig.3, Page 163, "Amateur Telpe Making" Book 1. A bowl which rotated was fitted to the spindle. I also …
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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 …
ادامه مطلبTypes of mirror grinding machines - ATM, Optics and DIY ...
Types of mirror grinding machines - posted in ATM, Optics and DIY Forum: Hi to all, I am planning to make a mirror grinding and polishing machine but i have limited knowledge about these machines. Because of this i have some questions to someone who has some experience with those machines; - Some machines have fixed supportes and some of them have a prestaltic moving arm, …
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Mirror grinding machine construction log - James Crombie
Mirror grinding machine construction log I started thinking about building my own mirror grinding machine several years ago. Having been on the ATM list now since almost the beginning of it here on the web, I had lots of of inspiration reading of others projects and viewing their webpages
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