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grinding mirrors

Telescope Mirror Grinding Machine | Crusher Mills, Cone ...

Grinding Machines Mirror-o-matic Tom Waineo's Desktop Grinding/Polishing Machine Ken Lilja's Grinding Machine. TELESCOPE MAKING – David Ratledge's Virtual Home. A telescope with a Schmidt corrector is a Schmidt … Secondary Mirror. … Even with a grinding machine this is laborious to say the least.

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(PDF) Grinding of aspherical SiC mirrors - ResearchGate

Fig. 1. Grinding methods using a cup wheel. = COS-1. b (~/a2- (B)2 - a) (2) Here, r is the radius of out~er or inner part of the grinding tool, and B the width of the mirror. The directrix of. the ...

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Newport Glass Works, LTD. Grinding, Polishing and Figuring ...

Placing the mirror face up and grinding with a moderate "W" stroke will also move the curve toward the edge, and tends to produce a more spherical surface. Leaving the mirror grossly hyperbolic will make fine grinding difficult. Fine Grinding . We've all heard stories about fine grinding taking hundreds of hours.

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GRINDING – Astro Khan Telescope Making

Grinding is the first step to make the mirror. You remove glass from Mirror blank and hollow it to a concave shape. Once you have the grinding post set, you can start grinding the mirror using the following options. Use the tool to rub the mirror over it by using various kinds of strokes

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Grinding - Amateur Telescope Making - India

Fine grinding and smoothing Once the rough grinding has been completed the mirror, tool, work plate etc. should be thoroughly scrubbed and cleaned using soap solution and an old tooth brush for example. If possible, the cleats should be replaced with new ones; the work post should be cleared, the newspapers and used cloth pieces thrown away.

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Grinding mirror using CNC router - ATM, Optics and DIY ...

1/4 λ is on the order of 0.000006in. My Son who is a qualified milspec machinist doesn't get closer than 0.0001in. I suppose you could rough grind the tool and initial mirror shape but this will only work if you CNC router is 3D.

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Mirror-grinding of single-crystal diamond substrates with ...

The mirror-grinding was conducted as follows, regardless of whether the substrate was rotated or fixed. When the grinding wheel first touched the surface of diamond specimen, the spindle position was maintained without application of any feeding for several minutes (zero-position grinding). The grinding wheel was then fed at a certain rate up ...

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Telescope Mirror Kits - Firsthand Discovery

Want to build your own telescope? Start with one of our telescope mirror kits. Each kit comes with a telescope mirror blank and all the abrasives (silicon carbide grits and white aluminum oxide powders), cerium oxide polish and pitch to grind and polish it to your specifications. Please note that our kits do not include a grinding tool or pitch ...

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Reflector Telescope Mirrors for sale | eBay

Round Mirror Reflector Gold Coated H-K9L Optical metal external Reflection. $26.88 to $61.33. $5.00 shipping. 1.25" Mirrors Diagonal 90° For Refractor Astro telescopes Celestron EQ Black. $28.99. Free shipping. or Best Offer. Newtonian Telescope Reflection Mirror D114mm FL900 With 25mm Secondary Mirror.

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Joy of Mirror Making: Fine Grinding - BBAstroDesigns

For large thin mirrors, say 12 inches [30cm] or greater and 1.5 inches [4cm] or thinner, the mirror back must be ground flat, or at least regular in shape before beginning fine grinding the mirror's face. Cast a tool specifically for the mirror's back, and grind with 220 grit, inspecting for low unground spots. Grind until they disappear.

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Outstanding mirror grinding machine Offers Local After ...

About products and suppliers: Improve the productivity in your glass production and processing business with innovative and cutting-edge mirror grinding machine available at Alibaba at irresistible offers. The mirror grinding machine boast of the latest inventions that redefine your glass processing, making it easy and timesaving. Manufactured using the utmost quality of …

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How I make Telescope Mirror Blanks - mdpub

Here is a stack of my home-made 8 and 10 inch mirror blanks. The second from the bottom is the one above. I can use the thinner blank below it as the grinding tool. UPDATE I have started rough grinding one of my home-made 10in glass blanks. Here is an action shot of me, pushin' glass. I am aiming for an f/5 mirror.

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Homemade Telescope Making - Google Search

The mirror (or tool) was then carefully placed on top of the tool (or mirror) and grinding started (i.e., pushing the glass disk on top back and forth). The procedure was quite similar to grinding a smaller mirror, except that the disks are heavier. With the coarser grits, pressure was applied to speed grinding.

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Build your own telescope part 1: The mirror – Thomas ...

Rough grinding. This step is about making one side of the glass concave. It will give your mirror its overall focal ratio. If you make the centre deep, you will end up with a fast telescope (e.g. F/D = 4) well suited for deep sky observations. On the opposite, a shallow mirror (e.g. F/D = 8) will be performing very well on planets and the moon.

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Grinding in Mirror World - YouTube

Song credit:https://youtu.be/AlXfbVpDUdoSong: Unknown Brain - MATAFAKA (feat. Marvin Divine) [NCS Release] Music provided by NoCopyrightSounds. Watch: https:...

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3mirrors ALUMINUM Tungsten Electrode Sharpener Grinder ...

After grinding, Centralized processing of the tungsten power, avoid trouble, convenient and healthy. The Futures of Third-gen Aluminum Tungsten Electrode Sharpener Grinder TIG Welding Tool: Dust cover design to get free health and convenience. Tungsten is heavy metal, and most tungsten needles contain about 2% of weak radioactive elements, such ...

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Edge | Polished edge, beveled edge, and seamed edge ...

Machine Polished Edge. A flat polished edge is most commonly found on glass tops (thickness ranging anywhere from 1/4″ to 3/4″). The glass is run through a glass edging polishing machine with a number of polishing wheels, ranging in grits getting finer towards the end. After the flat polish is created, the glass approaches two wheels angled ...

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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. …

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A high quality surface finish grinding process to produce ...

mirrors. Keywords: grinding, finishing, x-ray mirror 1. Introduction X-ray mirrors, reflective optical elements that can reflect and focus x-ray (beams) of short wavelengths, are applied to various types of analyzers, including synchrotron radiation facilities [1], portable x-ray elemental analyzers [2], and astronomical x-ray telescopes [3].

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How to grind a mirror for a telescope - YouTube

How to grind a mirror blank into the well-figured basis for a Dobsonian telescope. How to grind the glass, how to carry out a focus test, how to polish with ...

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Stellafane ATM Main Page

Much is also unchanged - mirror grinding techniques are very similar to those written up by Porter and Ingalls in the 20´s and 30´s. Many amateur astronomers still choose to fabricate their own instruments, for the pride of accomplishment, the gaining of …

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Tips for Using Mirrors in Copper Foiled Stained Glass

Grinding Mirrors. Silver backing chips very easily so use the finest grit grinder head you can get – super fine if possible. Alternatively, use an old grinder head which is dulled already. If you use a coarse grit it will chip into the mirror backing; Keep the backing uppermost to stop any scratching on the grinder bed

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Grinding Machine for Large Telescope Mirrors

Grinding Machine for Large Telescope Mirrors. I designed and built a grinding machine for mirrors up to 42 inches [1.1m] in diameter. By slipping on and off a couple of belts, the machine can quickly be reconfigured for spinning work or for stroking work. The machine can also work smaller mirrors if the drip pan is moved to the fast shaft on ...

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Thin Telescope Mirror Grinding Advice

When grinding thin mirror blanks, be conscious of downward pressure, which if excessive, may bend the mirror blank momentarily out of shape. While this is not a problem during rough grinding (as the amount of flex is exceedingly small) the effect becomes important as you reach the later stages of making your telescope mirror.

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Grinding my first 6" f/8 Telescope Mirror - YouTube

This video shows a few initial stages of making a primary mirror for a 6" f/8 telescope. I'm a newbie so bear with me in my ignorance as a first timer making...

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Grinding binoscope 400's mirrors - YouTube

Me starting my binoscope 400mm making. That is the grinding the backs of primary mirrors in Juny 2003 to planing it. Sorry for the small movie's problems at ...

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3mirrors ALUMINUM Tungsten Electrode Sharpener Grinder ...

When grinding: Apply light pressure to the wheel. Heavy pressure will result in excessive wheel wear and a rougher tungsten point. Always wear eye protection, respiratory protection, and protective clothing when using the angles controller and when welding. Remove the grinding wheel firstly before taking out the tool after use.

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Grinding In Mirror World || Kills?? || BGMI Gameplay ...

Grinding In Mirror World || Kills?? || BGMI Gameplay Highlights || Laggers Yard #bgmihighlights *****Please lik...

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Grind and Polish a Dobsonian/Newtonian Telescope Mirror ...

The process for grinding telescope mirrors at home actually doesn't look too much different than when Isaac Newton first developed it, and he didn't have any power tools. John Dobson was a monk and did much of his work in secret from his brotherhood.

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Mirror grinding - scope making

Add the usual half teaspoon of grit, sprinkle with water and grind for a couple of minutes, rotating tool and mirror often. Rinse the mirror and inspect the grid lines. If the grid is worn out evenly, you are doing fine. If you grinded with TOT, the edges will be more worn than the center, and vice versa if MOT. This is okay.

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Metallographic grinding and polishing insight | Struers

Grinding is the first step of mechanical material removal. Proper grinding removes damaged or deformed surface material, while limiting the amount of additional surface deformation. The goal is a plane surface with minimal damage that can easily be …

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Joy of Mirror Making: Polishing - BBAstroDesigns

Then after grinding the mirror face with 220 grit, cleanup thoroughly and flash polish by polishing for 15 minutes. Don't go onto finer grits until the astigmatism is gone. The second is to identify the saddle orientation, and using a sub-diameter lap, locally polish the ends of the saddle.

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Grinding an 8" mirror - YouTube

Me, grinding a 8" mirror for a telescope. Using a 1/3 tool on top stroke w/ 240 grit SiC

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Joy of Mirror Making: Rough Grinding - BBAstroDesigns

31 Grinding the curve into the mirror face can be done by one of the following …

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Grinding your own mirror - How is it possible to get ...

Page 1 of 2 - Grinding your own mirror - How is it possible to get accuracy in the nm? - posted in ATM, Optics and DIY Forum: So I have read forum questions & answers on topics such as whether it is possible to use a 3D printer to design and print out a telescope mirror, or design an array of paraboloids this way for a segmented design, and the answers have been, …

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