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Mirror grinding scope making

Again, rotate randomly, both tool and mirror. As soon as the curve has reached the edge, and your saggita is equal or slightly deeper (depending on method you use later) you can go on with the fine grinding. There are 2 ways to proceed. You can slowly

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Mirror Grinding Machine

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

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Joy of Mirror Making: Rough Grinding BBAstroDesigns

31 行· The curve is ground into the mirror face using a grinding tool. The curve is pre-generated for

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Making a Tile Tool for Mirror Grinding (in 150 seconds

2018-04-15· The condensed process of making a tile tool that will be used to grind my 8.5 inch telescope mirror. Making a mould around the Pyrex disc, mixing and pouring...

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Joy of Mirror Making: Fine Grinding BBAstroDesigns

I recommend making a separate fine grinding tool from plaster and tiles. Strive to make the tool the same size as the mirror. Tools larger than 20 inches are difficult to lift gently onto the mirror face. Tools act roughly similar as long as they are at least 50% of the primary mirror diameter. Experiments during a recent mirror making class show that there is a distinctly superior recipe to

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Fast Mirror Grinding & Polishing The ATMs Workshop

2001-11-15· For this mirror, I skipped the pre-polish step and simply used pads and CeO for initial polish. I used five pads on the 9" grinding tool during the polishing phase. A photograph of the tool appears in Figure 1 at left. (This tool was made in my usual manner using tiles attached with paraffin wax.) It took about an hour and a half of polishing

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Grinding and Polishing a Meniscus Mirror Astronomy

2017-10-17· While tools for grinding telescope mirrors is covered extensively elsewhere, I will say that the challenge posed by a fast mirror is that the sharp curvature requires your grinding surface to be made of small “bits”, whether those bits are tiles, coins, nuts, or whatever. In my case, I cast the base of my tool from Hydrostone, using my curve as a mold, and once that was cured I then

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Mirror grinding tile tool ATM, Optics and DIY Forum

2012-07-08· Mirror grinding tile tool posted 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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Telescope Making Supplies

Throughout the grinding and final lapping stages, the objective has been to reduce pits and scratches to the smallest possible size. However, no amount of grinding can produce a surface smooth enough or sufficiently transparent to meet the needs of a first-class telescope objective. Different techniques are needed. While there is still considerable discussion on the subject, it appears that

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tut44 Making A Mirror Grinding Tool Asterism.org

Making A Mirror Grinding Tool By Allen Malsburry The average person would never think, “I can make my own telescope.” Most amateur astronomers believe, “I can buy a better telescope than I can build.” Neither is actually correct. For many decades now, amateur astronomers have been building their own telescopes. In the good old days, building your own telescope was the only way to get

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How to do mirror finish grinding by a grinder

2021-03-08· 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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tut44 Making A Mirror Grinding Tool Asterism.org

Making A Mirror Grinding Tool By Allen Malsburry The average person would never think, “I can make my own telescope.” Most amateur astronomers believe, “I can buy a better telescope than I can build.” Neither is actually correct. For many decades now, amateur astronomers have been building their own telescopes. In the good old days, building your own telescope was the only way to get

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Mirror-o-Matic mirror making machine ATM pages of

Mirror-O-Matic grinding machine. When I decided in 2009 after a ten-year break to get into mirror making again, it quickly became clear to me that I would need to construct machine, as hand grinding big mirrors is not something very beneficial for the hands of a musician. I started to look around and quickly found Dennis Rech's website about the M-o-M (Mirror o Matic) that he developed

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telescope mirror grinding / polishing machine with

2016-02-15· The machine is shown grinding a 300 mm mirror.How to build a tachometer: florin.myip.org/blog/making-tachometer-grinding-polishing-machine-telescope-m...

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Mirror-o-Matic

Machine grinding and polishing is almost always done with the mirror on the bottom (MOB) and the tool on top (TOT). The tool can be another piece of glass, a tile tool or a metal tool. The tool is always smaller than the mirror if a concave mirror is desired. Tools of 50% to 80% of the mirror’s diameter are normal. Tools of less than 50% diameter may cause problems while grinding, although

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8" F6 Mirror Grinding Dr. Debug

2009-10-17· 8" F6 Mirror Grinding. For grinding tools I have read that it is recommended to use dental plaster or pure cement as a substrate. Then tiles are attached to this substrate either by glue or to embed them directly in the plaster or cement when the cast is made. Other tools used for hogging out also can be a metal ring or pipe flange. For my grinding tool I used Portland cement. This was readily

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Newport Glass Works, LTD. Grinding, Polishing and

A solid tool traps abrasive in the center of the mirror and resists grinding the mirror spherical. When you first start a new and smaller abrasive, this shows up as a tendency to form a large bubble in the center, especially in the larger abrasives. Remedy this by using short "W" strokes and stirring the abrasive under the mirror every minute of so until the bubble is gone. To stir up the

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Mirrors using undersize tool ATM, Optics and DIY

2014-09-21· Page 1 of 3 Mirrors using undersize tool posted in ATM, Optics and DIY Forum: I am working on a 13in mirror, at rough grinding stage #100 grit now.TOOL Is 10in diam.To keep within my design f ratio can I work with MOT ?? If so working towards a sphere, what Overhang and stroke is Acceptable ?? Macleod.

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Telescope Making Supplies

Throughout the grinding and final lapping stages, the objective has been to reduce pits and scratches to the smallest possible size. However, no amount of grinding can produce a surface smooth enough or sufficiently transparent to meet the needs of a first-class telescope objective. Different techniques are needed. While there is still considerable discussion on the subject, it appears that

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Telescope Mirror Blanks / TelescopeMirrorBlanks.Com

There are several advantages to using thin plate glass mirror blanks for grinding your telescope mirror: * Thin mirror blanks are less expensive, allowing more people to afford the hobby of grinding their own telescope mirror. * Choosing a thin mirror blank gets you more aperture for your dollar. * Telescope mirrors made from thin mirror blanks take less time to thermally equalize with the

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