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May 02, 2021· After dinner the tables were pushed to the side to make a dancefloor, "and Lourdes is on the iPad playing tunes. So I started dancing and Madonna came up and started, well… grinding …
Joy of Mirror Making: Fine Grinding . 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. During fine grinding, we''ll grind the mirror face against a …
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
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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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.
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Surface finishing is a broad range of industrial processes that alter the surface of a manufactured item to achieve a certain property. Finishing processes may be employed to: improve appearance, adhesion or wettability, solderability, corrosion resistance, tarnish resistance, chemical resistance, wear resistance, hardness, modify electrical conductivity, remove burrs and other surface flaws ...
Joy of Mirror Making: Rough Grinding - BBAstroDesigns
Dec 07, 2009· Page 1 of 5 - new grinding machine and 23,5 mirror project - posted in ATM, Optics and DIY Forum: Hello folks!I have been an ATM since 1992 and would like to share you some videos and pics in order to pay tribute to all ATM colleagues who have been sharing their knowledge publicly for common benefit. I try to get this mirror ready before the next summer.
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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.
Read Altoona Mirror Newspaper Archives, Aug 9, 1918, p. 11 with family history and genealogy records from altoona, pennsylvania 1876-2021.
The back face of the mirror is unblemished and relatively flat. There is an odd imperfection in the pyrex, but not one that would be ground into. 16″ f/11.8 pyrex mirror blank. underside of blank, untapered. 16″ diameter, 3.125″ thickness. The smaller chips on the ground side of the blank. The largest chip on the ground side of the blank.
Feb 20, 2012· Feb 20, 2012 - Building a 13" Portable Dobsonian Telescope
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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Dec 10, 2014· For rough work, where the edge is badly deteriorated, start with an 800-grit stone. But for most sharpening, begin with a 1200-grit stone for honing, and then move directly to a 6000- or 8000-grit stone for polishing.
Instrument Making Section. This Section is one of the oldest in the Society, and could also be known as the 'Telescope Making Section'. Its prime purpose is to provide a wealth of knowledge and experience to any member who wishes to construct an instrument which …
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:
Sep 23, 2012· 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...
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 ...
May 16, 2020· My passenger mirror doesn't fold. So I disassembled and found a broken ear on the housing. Fixed that with some JB weld and tested the motor with 12 V and it worked normally. Thought maybe the broken ear was blocking movement. Hooked the mirror back to the door module and still no joy. Everthing else on the door seems to work normally.
Origin: CN(Origin)Certification: CEModel Number: SFU1605Guide Width or Diameter: 16mm
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.
Next, I ground down the rough edge using a grinding stone and water and created a reasonably round disk 2 3/4 inches in diameter. This lens blank had a positive meniscus shape. For the lens grinding tools I used the bottoms from two other jars. ... Joy of Mirror Making by Mel Bartels.
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Mar 20, 2018 - Introduction to grinding polishing and parabolizing a telescope mirror. Pinterest. Today. Explore. When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures. ... Joy of Mirror Making: Introduction. Introduction to grinding polishing ...
The Joy of Mirror Making Mel Bartels. Introduction Rough Grinding Fine Grinding Polishing
Nov 3, 2019 - Introduction to grinding polishing and parabolizing a telescope mirror. Nov 3, 2019 - Introduction to grinding polishing and parabolizing a telescope mirror. Pinterest. Today. Explore. When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe ...
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