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How I built an edge grinder for telpe mirror blanks.

I borrowed a few ideas from the Mirror-O-Matic mirror grinding machine, particularly how to mount the turntable on top of the pulley. Anyone building machinery for cold-working glass should have a look at the MOM web site and plans. There are lots of good ideas there. The large wood circle will become the base of the turntable.

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Mike's Telpe Workshop

I finally decided it was time to build a machine to help me grind the edges of the blanks true and round. This is my home-built edge grinding machine for grinding down my home-cast mirror blanks. Click to see the whole project. This is a 12.5 inch diameter, 1.5 inch thick, light-weight honeycomb-back telpe mirror blank that I made myself.

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Making mirrors for giant telpes - SPIE Digital Library

The Starfire project provided much of the funding for a new polishing lab built in 1990 and equipped with an 8 m grinding and polishing machine and a 24 m test tower, which were first used to figure the 3.5 m mirrors. The Mirror Lab was not free to choose the focal ratios, so these mirrors were more conservative at f/1.5 – f/1.75.

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Mirror grinding - Telpe making

A good starter size is the 150 mm (6") mirror. A 200mm (8") will also work. Most ATM books and websites recommend a Pyrex® mirror blank, but in my opinion, annealed plate glass is better for this first, "learn and practice" mirror.It is cheaper, it is softer and grinds faster, needing less abrasives and with these small sizes, the low expansion glass like Pyrex has no practical …

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Building a fixed post mirror grinding machine ...

Re: Building a fixed post mirror grinding machine. I I had a nice piece of 3/4" stainless dowel that was begging to be used. So I bought a cheap pillow block to provide the locator for the metal dowel, and then drilled the overarm to fit. These pillow blocks are $8 and come complete with a locking collar - great deal.

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Mirror Grinding Machine | Hackaday

The true test of the amateur astronomer is building their own telpe. Grinding and polishing your own mirrors is a long, arduous process. Instead of lapping the blank by hand, Laurie Hall built ...

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

On the opposite, a shallow mirror (e.g. F/D = 8) will be performing very well on planets and the moon. The theory behind grinding is that you can remove glass as long as you use a material with a higher hardness. Telpe makers use silicon carbide powders (a.k.a. carborundum) for this task. It is cheap and comes in various size (can range ...

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M-o-M Free Preview - Mirror-o-matic

Mirror-o-Matic was designed to be a very low cost astronomical mirror grinding, polishing and figuring machine. Its attributes are: 1. It can be built for somewhere between $200 and $400. 2. It is constructed of hardware store items and it needs no machined parts. 3. It is constructed primarily of 3/4 inch plywood and has few close tolerances. 4.

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Mirror-O-Matic

Build a machine to grind the mirror (AKA mirror-o-matic) Buy some glass. Mirror-O-Matic . One of the coolest ideas I found on the Web was this thing called a Mirror-O-Matic. Credit goes to Dennis Rech for making available the plans on the Internet on how to build it.

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

On the opposite, a shallow mirror (e.g. F/D = 8) will be performing very well on planets and the moon. The theory behind grinding is that you can remove glass as long as you use a material with a higher hardness. Telpe makers use …

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TELPE MAKING - deep-sky

Diamond generator for hogging out mirrors - the blue is the angled cutter: Primary Mirror. The primary mirror at f/3 required a lot of glass to be removed to reach the correct depth. Even with a grinding machine this is laborious to say the least. To get over this problem Brian built a diamond generator. This can hog out deep mirrors in half an ...

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24" F/6 thin telpe mirror grinding 3/4" plate - Page 2 ...

Page 2 of 2 - 24 F/6 thin telpe mirror grinding 3/4 plate - posted in ATM, Optics and DIY Forum: Are there plans/parts list available for this setup?

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Amateur Telpe Making Main Page - Stellafane

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.

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ATM - TheSkySearchers

Come join the newest and most engaging and inclusive astronomy forum geared for beginners and advanced telpe users, astrophotography devotees, plus check out our "Astro" goods vendors. ... Building a fixed post mirror grinding machine. by Kanadalainen » Thu Aug 15, 2019 12:55 pm. 1; 2 ... Sourcing plans and parts for a bath interferometer ...

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How to Make Your Own Telpe Mirror - Instructables

How to Make Your Own Telpe Mirror: [Fig 1] This is a large piece of glass a woman off Craigslist gave me. It was 40"x40" and 0.75" thick. Its what I decided to use to make the mirror. Cutting it into smaller sections can be difficult but scoring it with a glass cutter …

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Stellafane ATM: Pour a Pitch Lap

1. Clean: Make sure your plaster disk is clean and dry.If you are using a glass substrate or tile tool, clean the surface with turpentine. 2. Build a Dam: Using 2" wide masking tape, build a dam at least 3/4" high around the edge of the disk to hold the pitch in when you pour it. Leave a tab at the end by to facilitate later removal.

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Making a 25 inch F2.6 mirror - BBAstroDesigns

Questions answered. Yes, a 25 inch [0.64cm] F2.6 that is half-inch [13mm] thick can be made by an amateur telpe maker. The greatest challenge by far is the extreme amount of parabolization required. Astigmatism and good mirror cell support are solvable issues.

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Telpe Making Links - Designs and Techniques | STAR ...

Grinding,Polishing and Figuring Large Thin Mirrors - Part 2 - Polishing Astronomy, telpe making,mirror grinding and testing Large Thin Mirror Making by Mel Bartels Grinding Machines Mirror-o-matic Tom Waineo's Desktop Grinding/Polishing Machine Ken Lilja's Grinding Machine Grinding Machine Figuring Figuring a Paraboidal mirror by thermal ...

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Telpe Mirror Grinding Machines | Crusher Mills, Cone ...

"The Machine": Homemade Telpe Mirror Grinding And Polishing Machine (Plans And Additional Photos) Mirror Making Machine – Welcome to the Fansler's. Bugger this for a Lark – A machine has got to be easier! I made my first telpe mirror, by hand in … could not afford the material to build a mirror grinding machine ...

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Mirror-o-matic - Machines

Machines. Mirror-o-Matic 14 Mirror-o-Matic 20

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Astronomy Options | Astronomy, Mirror Making, Telpes ...

Currently manufacturing a 16″ diameter 1″ thick plate glass f3.88 Newtonian telpe mirror. Doing this with my new fixed post grinding machine built this summer. Work is progressing well, and very efficient.

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Limestone Filler GRINDING MILL | Crusher Mills, Cone ...

Telpe Mirror Grinding Machines; Stone Crusher Equipment Mfg. Hyderabad; Mirror Grinding Machine Plan; Jaw Cresher Crushing Plant Price In India; Pe400x600 Sale Used Jaw Crusher Japan; European Cpap Suppliers; Advantages Of Impact Crusher; Comparison Of Jaw Crusher Vs Cone Crusher; Masala Grinding Machine; Pioneer …

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Fixed post mirror grinder advice - DIY Astronomer ...

Basically there are two types of grinding/polishing machine. The 'traditional' type which involves the mirror rotating at a relatively slow speed, a few rpm for a big mirror (16-20 inches) with the tool moving across the mirror, from side to side, at a higher rpm depending on the size of the mirror and/or tool.

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Making a homemade mirror grinding machine - ATM, Optics ...

Gordon will know more about the math for different mirrors and different sizes. I recall for mine it was about a 70% tool diameter. The bucket Gordon used to make the tile tool was 8 15/16", 70% of 12.5" ends up at 8 3/4". Looking back at my notes I used the tile tool primarily at the 70% zone of the mirror.

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Making a Mirror grinding & Polishing machine - ATM, Optics ...

Page 1 of 5 - Making a Mirror grinding & Polishing machine - posted in ATM, Optics and DIY Forum: Hello, I am on the half of the way to make a mirror grinding machine inspired by original M-O-M design. I made the pulley arrangement such a way that, both the turn table & eccentric spins at 50 RPM fixed. I wont go for making mirror bigger that 10.5 (or max 12).

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Dick Parker's Telpe Mirror Workshop: Cassegrain ...

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 machine could work well.

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

Thin Telpe Mirrors . Abridged from an article appearing in Telpe Making #12 Provided: Courtesy of Astronomy Magazine Article's Author: Bob Kestner . Part I - Grinding . For many years, amateur astronomers and telpe makers thought it essential that glass for telpe primary mirrors be at least one-sixth as thick as its diameter.

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Large Thin Mirror Making - BBAstroDesigns

In addition, a great deal of money will be saved: a finished 24" scope will set you back $7,000; grinding your own mirror and building the mount yourself will cost you $2,000. Amateurs have made mirrors up to 41" by hand. A grinding machine relieves the labor, but is not necessary. A 24" is the largest you can comfortably do solo.

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Building the World's Largest Telpe | IndustryWeek

Consider the production of the massive yet highly accurate mirrors needed for the one of a kind telpe. The process is happening far beneath the University of Arizona football field at the Richard F. Caris Mirror Lab where six of the world's largest mirrors are under construction using the world's purest glass, within a giant spinning oven.

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Mirror-o-matic

The Machines: Documentation: Information for ATMs Zip archive of Mirror-o-Matic Yahoo Groups (2000-2019) 307 Contact Dennis. The Machines: Documentation: Information for ATMs Zip archive of Mirror-o-Matic Yahoo Groups (2000-2019) 307 Contact Dennis ...