joy of mirror making rough grinding

Christmas Deer Large-scale sale Merry Bright Joy Peace ...

QUALITY MATERIAL: Our hinged spring clip is crafted from mirror and satin chrome-plated metal with a glossy resin-topped featured design shown. The round charm measures 0.6" (16 mm) in length. The clips are approximately 2.3" (5.8cm) x 1.1" (2.8cm) in size.

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

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.

Mel Bartels' Amateur Telpe 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 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 kits

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 ...

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

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.

Stellafane Links Page

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 Tutorial by Berislav; Mirror Making Video by Armin (German) Mixing Suspension-Treated Abrasives; Mother of All Sagitta Charts ...

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" …

Optics: Spider and Secondary Mount | Telpe 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 ...

The Joy of Mirror Making: Parabolizing - BBAstroDesigns

This is the beginning of mirror making wisdom. Wisdom in mirror making is not learned; it is absorbed by constant observation and thought over a long period of time. Luckily for the first time mirror maker, the joy of taking the first step is as powerful as the satisfaction of an experienced mirror maker finishing a difficult mirror.

Summierian II, een 100mm f/4 Babydobson | Roelblog | Telop

Joy of Mirror Making: Rough Grinding. Rough grinding a telpe mirror. E. Edward. Telpe Making. Astronomie. Cirkels. How to make an azimuth setting circle. Point accurately to anywhere in the night sky with this simple project to help you to locate targets with a Dobsonian telpe. Gal Golan. Dob Setting Circles.

The Joy of Mirror Making Mel Bartels | Mirror | Grinding ...

For more see Introduction Rough Grinding Polishing Parabolizing Polishing Star Testing. converted by W eb2PDFConvert The Joy of Mirror Making Mel Bartels. Polishing Polishing a mirror is one of the great joys you will experience as a maker and builder. It's also arguably the most accurate surface made by man or machine.

Telpe Mirror Making: Part 3, Rough Grinding - YouTube

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 | Diy telpe ...

Nov 21, 2020 - This Pin was discovered by Gerry Germishuizen. Discover (and save!) your own Pins on Pinterest

14" Phoenix | Telpe craft, Diy telpe, Telpes

Joy of Mirror Making: Rough Grinding. Rough grinding a telpe mirror. Gerry Germishuizen. Cnc projects. Stargazing Telpe. Telpe Craft. Cosmos. Astronomical Observatory. Project Success. Watch Diy. Woodworking Garage. Star System. Learning Styles. The Simplest Way To Prepare A Diy Telpe Most Inexpensively.

ATM Resources – Astro Khan Telpe 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 Telpe Making Main Page; The ATMs' workshop by John D. Upton; Mel Bartels' Amateur Telpe Making and The Joy of Mirror Making

Telpe Making, Rough Grinding a Primary mirror for a 12 ...

In this video, I continue rough grinding my 12.5 inch primary mirror for my Buchroeder Quad Schiefspiegler. The radius of curvature will be 300 inches when c...

spherical grinding stone

Joy of Mirror Making: Rough Grinding Motorized grinding wheel on the end of along boom that is anchored that is moved ... Making a Dental Stone Tool Method of grinding of a mirror. With this method, the first thing is to mostly grind out …

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John Pierce's Telpe Making Articles.

We use the following sizes: Nos. 80, 120, 220, 400 and 60 aloxite and 600 emery. One pound of the No. 80 and a 2 oz. can of each of the others will be ample. A pound of Wilmington pitch and a 2 oz. box of optical rouge completes you list of the necessities for the grinding and polishing of the mirror. We are now ready to start the mirror-making.

Prepping to Grind | Telpe Building

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…

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 ...

Summierian II, een 100mm f/4 Babydobson | Roelblog | Telop

Joy of Mirror Making: Rough Grinding. Rough grinding a telpe mirror. Gerry Germishuizen. Cnc projects. Ruimte En Astronomie. Wetenschap En Natuur. Kosmos. Kennis. Instrumenten. Zelfgemaakt. Ruimte. Cultuur. Bricolage. The Simplest Way To Prepare A Diy Telpe Most Inexpensively.

How I built an edge grinder for telpe mirror blanks.

A course diamond grinding drum is installed on the grinder. It will be used to take off the rough edges, and make blanks truly round. Then a switch to a finer grinding drum will clean up the edge. The edge grinder is done! Here I am doing a dry run to make sure everything works. A 13.5 diameter wood disk has been installed on the grinder.

pp_ - xuexifangfa

ppalone!" -119- Wuthering Heights I took her hand in mine, and bid her be composed; for a succession of shudders convulsed her frame, and she would keep straining her gaze towards the glass. "There's nobody here!" I insisted, "It was yourself,Mrs. Linton： you knew it a while since. "Myself!" she gasped, "and the clock is striking twelve!

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 like Pyrex has no practical …

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

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.

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 …

Ask HN: What things has tech made worse in your life ...

Ask HN: What things has tech made worse in your life? Growing up I always enjoyed tech and was excited for all the problems tech can solve and all the improvements it can make and has made in my life. However, recently I had to check-in into a doctors office using a 3rd party software and the process is incredibly worse for the patient.

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.

Pin on Telpe Makers - Pinterest

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 …