joy of mirror making rough grinding

170 Telescope craft ideas in 2021 | telescope craft ...

Joy of Mirror Making: Rough Grinding. Telescope Craft. Radio Astronomy. Make Your Own. Make It Yourself. 3 D. Mirror. Glass. Educational Activities. Woodworking. How to Make Your Own Telescope Mirror. How to Make Your Own Telescope Mirror - Instructables. Telescope Craft. Hubble Space Telescope. Radio Astronomy. Watch Diy.

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From Ring Tool to Tile Tool | Telescope Building

From Ring Tool to Tile Tool. After four hours of using the ring tool with 60 grit, I sufficiently reached the goal-spheroid of FL 78″ that we decided to move from ring tool to tile tool. (1) we traced the circumference of the mirror over a mat of porcelain tiles and cut the mat into the circle with a wet saw.

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Grinding,Polishing and Figuring - Part 2 - Polishing

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.

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Rough Grinding – Fine Grinding | Telescope Building

Rough Grinding – Fine Grinding. I built a "grinding board.". It raises the grinding level seven inches above the table top for the sake of my back. I made it out of particle board scrap. I found a 17″ round of pine at Home Depot for $4. The disk sits on three furniture slides hammered into the particle board box.

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Rough Grinding a 20" Quartz Telescope Mirror on the Fixed ...

Mar 07, 2010· This video shows how to setup a mirror grinding machine for fixed-post grinding, also known as spin grinding or spinning. After setup, you'll see how abrasi...

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Hogging out | Telescope Building

Hogging out. The strategy here is to use a "ring tool" to "hog out" the spheroidal curve roughly. I've decided to grind to f/6.25 for a focal length of 78 inches. The ring tool: a 6″ steel disk about 1/2″ thick. Folks on campus helped me with this.

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Joy of Mirror Making: Fine Grinding - BBAstroDesigns

The Joy of Mirror Making Mel Bartels 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.

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Telescope Mirror Making: Part 2, Hogging to depth

Telescope Mirror Making: Part 2, Hogging to depth This is part 2 of my video series documenting grinding and polishing a 12.5 inch telescope mirror. I'm using a spin or fixed post grinding machine.

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Joy of Mirror Making: Rough Grinding | Diy telescope ...

Joy of Mirror Making: Rough Grinding. Rough grinding a telescope mirror. Gerry Germishuizen. 2 followers. Grind. Diy Telescope. Telescope Craft. Radio Astronomy. Cnc Projects. Diy Wooden Table. Astrophotography. Maker Project. Telescope. More information.... More like this. Maker Project. Educational Activities ...

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Rough Grinding an 8.5 inch Telescope Mirror - YouTube

Mar 30, 2018· The first phase of rough grinding my 8.5 inch Pyrex disc into a telescope mirror. Including beveling the edges, measuring sagita (central depth), and grindin...

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Build your own telescope 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 telescope (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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The Mirror: Grinding, Polishing, Figuring | Telescope Building

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.

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Stellafane ATM:Mirror Making Myths

Making a Mirror takes Hundreds of Hours of Work. Not True! A 6" or 8" mirror should take about 40 to 80 hours of effort. While this is a non-trivial amount of time, the mirror can be completed in a few months, and certainly within a year. Most people work one to three hours a …

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Making a Tile Tool for Mirror Grinding (in 150 seconds ...

Apr 15, 2018· The condensed process of making a tile tool that will be used to grind my 8.5 inch telescope mirror. Making a mould around the Pyrex disc, mixing and pouring...

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Sandridge Foods - Capabilities

Sandridge Foods Corporation creates premium refrigerated soups, salads, dips, specialty sides & entrees for the Retail & Foodservice industry. We use the highest-quality ingredients to produce traditional favorites, custom recipes and on-trend flavors.

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Joy of Mirror Making - BBAstroDesigns

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

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Chick Has Orgasm on LIVE TV with Joy Behar - TMZ

Joy Behar interviewed a expert on her Current TV show and the chick busted out an orgasm right there on TV -- just by THINKING about it.

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ATM Supplies, Sites and Links – Astro Khan Telescope Making

Can do mirrors upto 20 inch size. Blue Cotter, Roorkee, Uttarakhand (UK). Contact person: Mr. Dilshad Ali, +91-9917776288. Can do mirrors upto 12 inch size. ATM Knowledge Web. Stellafane Amateur Telescope Making Main Page; The ATMs' workshop by John D. Upton; Mel Bartels' Amateur Telescope Making and The Joy of Mirror Making

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Optics: Spider and Secondary Mount | Telescope Building

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 ...

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telescope grinding machine

Nov 06, 2020· Joy of Mirror Making: Rough Grinding - BBAstroDesigns 31 rânduri Rough Grinding The first milestone is putting a curve into the mirror face. The . MIRROR DIAMETER 2.5 3 3.5; 4: 0 ...

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Is grinding a mirror really that hard??? - ATM, Optics and ...

Mar 16, 2002· The "knack" of making a mirror is an acquired ability. You get the knack by doing. The qualities most important are patience, perseverance, and the ability to learn from mistakes. I admire your enthusiasm and desire to make a large dia mirror for your first mirror, but I think it would be a mistake. Make a 6" mirror first.

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Rough Grinding of a Telescope Mirror | Guy's Math & Astro Blog

Dec 15, 2014· The ground-up glass and grit will make a muddy slurry, which will eventually slow down the grinding process. C. Try not to wrap your hands around the edge of the mirror towards the edge, if at all possible. This will heat up the edge of the mirror, making it expand, which can cause bad, unexpected results.

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Mel Bartels' Amateur Telescope Making

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 telescope mirror is arguably the most accurate surface made by human or machine. Amazingly you can grind a mirror by hand and make a telescope with simple hand tools.

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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 grind, and you have beveled the edge.

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Pin on

Jul 30, 2021 - The best proof of quality and reliability is satisfied customers. And that is why we are quite proud that more and more astrophotographers, research centres, institutes, universities and public observatories worldwide use optics and telescopes from Alluna Optics.

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Stellafane Links Page

JoeAstro Mirror Grinding; Joy of Mirror Making Rough Grinding by Mel; Joy of Mirror Making Fine Grinding by Mel; Large Thin Mirror Grinding; Making a 110mm f/7 by Arjan; Making a 150mm f/4 by Arjan; Making a 250mm f/6.4 by Arjan; Mirror Grinding by P.N.

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Grinding Applied Stage

Grinding Applied Stage. Intermediate autogenous grinding can efficiently replace the rod mill and ball mill stage of a conventional grinding circuit The need was shown for closed circuit operation of the last stage of crushing to control the top size of the mill feed A reasonable rate ratio between media and total mill feed was established

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My first ever mirror drop (5k hours in) : pathofexile

These numbers are a rough estimate as I didn't record them throughout the experience but the big ticket divination cards are accurate count. I started with an initial investment of 50ex (4,500 Cards) and went from there. After 80,000 stacked decks, I opened: 3 House of Mirrors. 1 Demon. 4 Fiends. 13 Doctors. 8 Succor of the Sinless. 4 Love ...

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Photoshoped 3 mirror guy gets another mirror this time ...

These numbers are a rough estimate as I didn't record them throughout the experience but the big ticket divination cards are accurate count. I started with an initial investment of 50ex (4,500 Cards) and went from there. After 80,000 stacked decks, I opened: 3 House of Mirrors. 1 Demon. 4 Fiends. 13 Doctors. 8 Succor of the Sinless. 4 Love ...

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Joy of Mirror Making: Introduction - BBAstroDesigns

Apr 03, 2020· Welcome to my channel - in this video, we will begin to make a telescope mirror from scratch! I'll be showing you the basics of telescope mirror grinding!Her...

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