FINE GRINDING THE MIRROR. ... Fine grinding is done in about the same way as the last wets of rough grinding, but with a series of finer and finer grits such as 100, 220, 320, and 500, and finishing with 5 micron (15 wets) before pouring a pitch lap for polishing. The function of each succeeding, finer grit is to grind out the pits left by the ...
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Run each grit size for about two hours; longer for large mirrors larger than 12 inches diameter. A fine grinding session is called a 'wet' and runs five to ten minutes long. Start with a thoroughly washed mirror and tool, placing the …
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Mirror grinding is a grinding that the surface roughness of the workpiece is Ra< 0.01μm, and the light is like a mirror after grinding, so it can be clearly photographed. The flatness of the grinding surface is not greater than 3μm /1000mm. The surface machining of high precision and high added value parts requires mirror grinding. 2. Grinder ...
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When the back has Blanchard ground, it will not take more time to grind the mirror flat with a 220. Fifth Phase: Preventing Astigmatism. The first step in preventing astigmatism is by grinding the back flat. You also need to ensure proper mirror support and do fine grinding and polishing the mirror face up.
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Mirror grinding-Shenzhen Shuguang Precision Machinery Co., Ltd. -Mirror grinding (mirror processing) is a process that uses fine abrasive particles to evenly trim the unevenness of the workpiece surface to nanometer level. It is the highest state of metal cutting and ...
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Fine grinding is usually used for superabrasives wheels while flat honing is more for conventional abrasives wheels. Grinding with lapping kinematics is helpful when the workpiece needs machined precision surfaces on a difficult-to-grind material such as hard ceramics [55]. It is recommended for use if a mirror finish is needed when it cannot ...
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fast mirror fine grinding,strokes to extend curve to edge - posted in ATM, Optics and DIY Forum: Hogged out my 10 inch x 3/4 mirror blank with steel tool and 80grit. Making a fast mirror.Made a tile tool with 1/2inch square by 3/8 thick unglazed bathroom floor block tiles, so plenty wear available.Been fine grinding TOT w strokes about 1inch overhang both ways, and …
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So, long story short, I am back to grinding a 6' f/8 this time, The FL now stands at 49" (f/8.1). I had finished fine grinding with 1000 grit SiC and moved to 1200 grit SiC but only to realize (after 30mins of grinding) that the seller had incorrectly labelled the powder as 1200 grit. I ended up with large pits all over the mirror and had to ...
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nihil molestiae consequatur. 18/09/2015; 10 Comments; Super User; 3 Tags; Little abrasion wear, Long service life . Based on 30 years of development experience of grinding equipment, LM Heavy Industry produced LUM Series Superfine Vertical …
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FINE GRINDING THE MIRROR. After generating the mirror curve by rough grinding it remains for us to smooth it by fine grinding and polishing before finally correcting it to a parabola of revolution. Fine grinding is done in about the same way as the last wets of rough grinding, but with a series of finer and finer grits such as 100, 220, 320 ...
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The initial rough grinding process uses grit sizes of 60, 120, and 180 to carve out the basic spherical cavity. The mirror is then fine ground with grits of sizes ranging from 220-900. In both grinding processes, the grit is harder than the mirror blank and tool, resulting in a concave mirror and complementary convex tool.
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The use of ELID mirror grinding technology for precision machining of steel-bonded cemented carbides makes it easy to obtain low-roughness mirrors. I. The basic principle of ELID grinding technology On-line electrolytic …
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High Energy Comil H20. Benefits. Ultra-Fine Powder Grinding. The F10 fine grind mill is an advanced fine powder grinding machine, producing the highest percentage within the target PSD of any existing fine milling technology. For d50 milling in the 5–45 micron (< 325 U.S. standard mesh) range, the Quadro ® Fine Grind F10 delivers unsurpassed ...
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Fine ceramics have the properties of high hardness, chemical inertness, high thermal resistance and low electrical conductivity, but, because of high hardness and brittleness, they are very difficult to machine. Therefore, a superabrasive diamond wheel is used for mirror-like grinding of this material. In this study, an in-process electrolytic dressing system for carrying out mirror-like ...
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· 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: The curve is ground into the mirror face using a grinding tool. The curve is pre-generated for you.
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After having the ground and face of the mirror flat through the 220, you are good to begin rough grinding the curve into the mirror; Do some fine grinding; Proceed and trying getting a sphere; After getting your final abrasive, you can now perform polishing; There is a question on whether to build or buy a telescope mirror amongst most astronomers.
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Grinding, Grit, Mirror. 3. Grinding (intermediate and fine): Once you have reached your goal for the sagitta, and inspected it, then it's time to move on to the next smaller grit size and to a more conventional grinding technique. First of all, throw away all of the used newspaper, rinse out the water bucket, wipe off and put away the grit ...
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in the 2001-02 Stellafane Mirror Class. Fine grinding refines the basic shape you have ground into the surface of the glass with rough grinding. The sequence of ever finer grits that you use smoothes the rough surface that was made in rough grinding, and prepares you for polishing. You are also refining the shape of the surface to be a section ...
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September 26, 2006. The true test of the amateur astronomer is building their own telescope. Grinding and polishing your own mirrors is a long, arduous process. Instead of lapping the blank by ...
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