joy of mirror making fine grinding

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The 25 Best Food Mills of 2020 - Fitter Living

It includes three stainless steel grinding discs for preparing foods of fine, medium, and coarse textures. The fine disc can be used to make fine sauces and baby food, the medium disc works great for applesauce and soups, while the coarse disc is perfect for chunkier sauces and mashed potatoes.

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Metal (Aluminium) primary mirror making? - ATM, Optics and ...

Aluminum is too soft to allow conventional grinding techniques. Aluminum work hardens. Inability to produce an optical finish. Corrosion of surface, aluminum is highly reactive. Despite all this, the ATMMETALMIRROR group is happily making aluminum mirrors and using them in their telescopes with apparent success.

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Joy of Mirror Making: Polishing - BBAstroDesigns

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. If the mirror is expanded to the size of a football field, then the mirror's surface will be smooth to 1/1000 inch or 1/30 millimeter!

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Parabolizing 1 | Telescope Building

Parabolizing 1. 03.06.2014. I used the parabolization stroke for thirty-five minutes and moved from strong spheroidicity to 2/5 wave. 06.06.2014. I continued with parabolizing strokes. Some turned down edge led to some tightening of the amplitude of the strokes. Then a hole in the center led to even more of a tightened amplitude, but with full ...

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

Spending way too many resources and making it seem fine. Driving 100s of km every week like it's normal. Flying 10x per year. Turning the heat up in winter while wearing a t-shirt. This is an age of extreme luxury and we don't realize it. That and addiction to my smartphone.

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Mike's Telescope Workshop - Mike's World.

I finally decided it was time to build a machine to help me grind the edges of the blanks true and round. This is my home-built edge grinding machine for grinding down my home-cast mirror blanks. Click to see the whole project. This is a 12.5 inch diameter, 1.5 inch thick, light-weight honeycomb-back telescope mirror blank that I made myself.

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Lazada's constantly evolving technology, logistics and payments infrastructure connects this vast and diverse region, and offers Southeast Asia a shopping experience that is …

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Programme

Spekki Webu has a fine line in this, and so much more. Hailing from the modest ringed city of Delft, the imagination of Spekki went far further: with a creative outpost, Mirror Zone, and DJ sets known for their ambition, he is a spot-on fit for where Dekmantel Festival is at in the 2020s.

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Telescope Building | Pushing Glass and Sawing Wood

From mid-November 2012 to mid-April 2013 I constructed a telescope from scratch … from grinding the mirror to building the tube. This site was initially conceived for family and friends to keep track of my progress. Early on I began to think the site could be helpful (and encouraging) for aspiring hobbyists. The telescope was a six-inch f/7.73…

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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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Joy of Mirror Making: Introduction - BBAstroDesigns

31 The Joy of Mirror Making Mel Bartels Rough Grinding The first milestone is putting a …

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Mikael Wistrand on LinkedIn: Did you know your ...

Fine-Grinding aims to improve wear resistance again micro-pitting, friction loss reduction, flank and tooth root load bearing capacity, increase gear efficiency and longer life time of gear and ...

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Homemade Telescope Making - Google Search

Mirror making for beginners . Joy of Mirror Making by Mel Bartels. Large thin mirror making by Mel Bartels A number of the techniques I used to make the 14.5 inch mirror came from this website. It was very helpful. Here are some other large mirror making sites you might find helpful: Making a Large Mirror - Part I. Making a Large Mirror - Part II

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Swayze Optical! - Home Page

Grinding and polishing the mirror is the most difficult part of making a telescope. And the most critical. Mirror-making is a hobby that has been around for many years, and many people have put their hands to the task, but it is time consuming, requiring a great deal of skill, patience and perseverence. Especially when the mirror gets big.

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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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How is the mirror polishing finish done on stainless steel ...

The goal of this step is to make the surface of the tube free of welding marks and further polish the already waxed and polished tube to achieve a mirror effect. The mirror finish on stainless steel enhances its appearance and consistency, making its cleaning easier. It also masks the after-effects of welding and hides surface damage, if any.

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Parabolizing 2 | Telescope Building

Parabolizing 2. 2014 October 01. The question is whether to continue figuring the mirror or to be happy with what I have. A strategy: to do a star test. In September we attempted to get a tumble-down jig up to speed. Even though we got the pieces of the jig together, the streetlights around the community center reflect too brightly off the ...

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Cosina announces its fastest full-frame lens, the Nokton ...

Grinding aspherical elements is very difficult if you don't want to leave extremely ugly circular marks that end up showing in the oof highlights. Those are the reasons why I sold the first 3 Otus. The 100mm f1.4 is mostly free of them and so is the Nikon 58mm f0.95 Noct. Another example of a lens ruined by those marks is the Canon 28-70mm f2.0.

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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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Experiment: Metallography Specimen Preparation and ...

An important factor throughout the Coarse Grinding and Fine Grinding Stages is that the scratches be uniform in size and parallel to each other in any one grinding stage. Proper grinding involves rotation of the sample by 90o between stages while the grinding angle must be held constant during the grinding at any one stage.

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Glass Grinder Bits - Top Diamond Grinder Bits and Diamond ...

Glass Grinder Bits with Fine, Medium and Regular Grits. The Grinder Shop carries the most used and popular glass grinder bits available today. Diamond grinder bits come in a different grits for working on a diverse range of glass. An ultra-fine or fine grinder bit is best for mirror, antique or dichroic glass because of their delicate natures.

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TELESCOPE MIRROR MAKING HOW TO: Fine Grinding - YouTube

In this video I am showing you how to make a DIY telescope mirror! This is the second part in the series, showing fine grinding in a step by step tutorial.

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ATM Resources – 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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Polished Plate Glass and Similar Products and Services ...

Polished plate glass. Polished plate is a type of hand-made glass. It is produced by casting glass onto a table and then subsequently grinding and polishing the glass. This was originally done by hand, and then later by machine. It was an expensive process requiring a large capital investment. Other methods of producing hand-blown window glass ...

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Lapping and Polishing Basics - South Bay Tech

2.1: Grinding Grinding can be defined as the rapid removal of material from a sample either to reduce it to a suitable size or to remove large irregularities from the surface. The grinding wheel or plate typically rotates at a high speed (around 200-1000rpm) and a coarse, bonded abrasive (> 40 µm) is used.