First time mirror grinding 8" f/5ATM Optics and DIY
Jan 05 2020 · Grinding an 8" mirror on the 6" steel tool would mostly keeping the center of the mirror out very near the edge of the tool. As the curve is generated in the glass only a narrow area at the edge of the tool will be in contact and grinding the glass. Essentially it would be a ring tool. Stroking too close to center would tend to flatten the mirror.
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Nov 27 2015 · Prussiani Engineering presents Mirror CNC polishing machine for marble granite slabs with three interpolated axes and automatic tool change. Perfect for calibrating polishing sanding
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The tool being a copy of the glass is also not spherical and thus needs some grinding along with the mirror to gain the spherical state. Typically I make a tool in about 30-40 minutes from the time that everything is pulled out until the tool is off of the mirror and the back is cleaned up so that the tool will sit flat on the table top.
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"BL" porous resin bond wheels are designed for mirror grinding of carbide alloy molds ceramics silicon wafers and hardening steel alloys. With the effect of pores and a heat-resistant bond strengthened by special filler these wheels produce high quality finished
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Resin bonded grinding tools..129 Metal bonded grinding tools ..136 Electroplated grinding pins ..139 Small grinding tools for coordinate was established in 1665 to supply glass for the Hall of Mirrors in the Palace of Versailles. kits out every second car in Europe with window glass
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Discounted Telescope Mirror Blanks Mirror Grinding Tools and odd-sized blanks Discounted Mirror BlanksBig Savings TelescopeMirrorBlanks sells discounted mirror blanks which have a few more surface scratches than normal or more than average edge chippingthese mirror
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Dec 15 2000 · As all ATMs soon discover there are many different ways to do each of the tasks required for grinding your own mirror. Making a grinding tool is no different. For smaller mirrors up to about 10 inches diameter using a solid glass tool
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Jul 08 2012 · Mirror grinding tile toolposted in ATM Optics and DIY Forum Hi all Im about to begin crafting a mirror grinding tool out of plaster and tile. In researching how to make the tool Ive ran across some conflicting instructions. Would I create the tool flat or make it convex in accordance to the final shape of my mirror (an 8 f/8 parabola)
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Grinding the secondary is just like grinding any other optic except in minature. I ground the secondary with the workstand and worked the tool on top just like I would grind a larger mirror. This optic is small enough that a lens grinding
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They are available in the tool coating variants BLUE-TEC and BLACK-TEC. Karnasch carbide burrs and carbide rotary burrs have optimized front sides for an improved cutting efficiency and extremely smoothly grinded milling surfaces (mirror grinding) for higher material removal.
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MIRROR MAKING "HOW TO MAKE YOUR OWN TELESCOPE MIRROR . When ready to make a concave surface on the mirror you will need to have the mirrorglassblanc and glassgrinding tooldisk and grinding grit place the "tool" on a wet cotton rag (to prevent slipping" on a level work surface sprinkle Carbo grit and little water on and grindhogging with the mirror on top making circular strokes with (1/3
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After fine grinding the mirror has to be polished. The toolmade from plasteris the same as used for fine grinding but now carries a special polishing layer. The polish commonly used is cerium oxide.
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I like to use tools that are 75 the mirror size. The tool is lighter and easier to handle and still grinds fast enough. Plaster tools over 20" in size are heavy and awkward to handle. Make a grinding tool from finishing plaster hydraulic cement casting plaster or concrete available at
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For grinding the back of my 12" mirror I used an 8" disk of 3/4" particle board glued tiles to the front with epoxy and coated the back and sides with polyurethane. It worked great. I made my polishing tool for my 12" mirror out of three layers of 3/4" particle board glued together. I used a chisel and a belt sander to put a curve on the
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Discounted Telescope Mirror Blanks Mirror Grinding Tools and odd-sized blanks Discounted Mirror BlanksBig Savings TelescopeMirrorBlanks sells discounted mirror blanks which have a few more surface scratches than normal or more than average edge chippingthese mirror blanks are perfectly usable just a bit "aesthetically challenged" and these cosmetic flaws will in no way affect
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Cleaned mirror platter and tool dried mirror and check with low angle light. No Pits visible. Very uniform surface under 7 power loupe. Aug 5 2003 I was off to the Nova East Starparty for the weekend a good turnout but lousy weather. We were rained out for 3 days. -( Started on the 12micron grit today.
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By switching mirror on top / tool on top we keep the shape of the mirror. At this stage we can use finer grit. The courses are now reduced to 1/3 center over center. Mark the larger holes with a Sharpie and continue grinding
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Feb 11 2014 · Gordon Waite describes the mirror grinding tool that he used to grind a pair of 22" f/4.0 mirrors for the Binoscope project. The tool is made
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You can use a tool 75 of the mirror diameter without much difficulty. Tools smaller than 75 have less tendency to produce a spherical curve during fine grinding. Although a 16" tool works well with a 16" mirror for larger mirrors I would recommend a smaller tool simply because full size tools
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My Mirror Grinding Machine. For a long time I ve wanted to build a machine for grinding telescope mirrors. Dennis Rech s M-o-M designs finally inspired me to just get up and do it. Over the years I d been collecting motors gear boxes pulleys etc. Most of them came from industrial junk yards.
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The basic grinding zone is a surface to put the mirror and tool on some towels for cushion and cleanup water and grit. If you are working indoors you should have a bucket of water to rinse the mirror and tool in. If you are outside you can spray them off with a hose. John Dobson likes to work on a board placed over two buckets.
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Grinding Tool Sanders. Grinders and Accessories 4" X 106" Upright Machines 4" x 64" Machines 4" x 132" Machines Grinding and Smoothing Mills Scratch Polishing Machine 4" x 106" Seamers Used to Aid in Polishing Glass and Mirror CRL Polishing Oil CRL Tube Wax Lubricant
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It can be flat or it can have the radius of your mirror on it. The grinding tool is traditionally used by TMs. The base must be thick enough not to flex and can be made of thick glass aluminumeven plaster has been successful. What you choose is up to you. I have always used 16" or 18" X 1" thick portholes.
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Mar 06 2006 · The larger one is for grinding and polishing mirrors and is also used at higher speeds to centrifugally cast resin mirrors an experiment I am playing with in my spare (sic ) time. The smaller mirror
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Lens Mirror Making Best Lenses And Mirrors Are. Lens mirror making best lenses and mirrors are both made by grinding the surface start with a mirror or lens blank for mirrors only surface needs to be good typical mirror want pyrex eg bk7 then need a tool blank poorer glass softer glass place mirror on top tool now add grinding compound grit between
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Mirror on top (called MOT) can also be used to avoid astigmatism since the tool supports the mirror but the grit seems to fall down between the tiles requiring more grit and wets to complete. 6 inch 15cm tiled tool. Rough Grinding. Unless the mirror comes pre-generated the initial curve will have to be ground into the mirror.
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