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Discovering Mount Wilson Chapter 14: The 100-inch Telescope

Sep 14, 2021· The glass disk arrived in Pasadena on December 7, 1908, the same day that the finished 60-inch mirror was installed in its own telescope, on Mount Wilson. Everything was prepared for the arrival of the 9,000 pound slab of glass, including the building of the world's largest grinding machine.

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Links: Amateur Telescope Making - AOAS.ORG

Little Dipper Telescope (1,321) Interesting article on building an open-tube Dobsonian based on the designs of Albert Highe; Mirror-O-Matic (937) Want to grind your own mirrors? Don't want to wear your arms out? try building one of these mirror grinding machines. Plans and instructions for the ATM. Nils Olaf Carlin - Hacksaw Spider (1,081)

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Making mirrors for giant telescopes - 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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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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Build your own telescope 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. Telescope 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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Mirror-O-Matic

Oct 17, 2009· 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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Mirror grinding - Telescope 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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How I built an edge grinder for telescope 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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Stellafane ATM:Mirror Making Myths

Mirrors can only be made with Special Precision Equipment in Expensive Factories or Labs; Not True! Telescope mirrors can be made in your kitchen, basement or garage with nothing more than the mirror blank and a second piece of glass (called the tool) to rub the mirror against with an abrasive grit and water slurry.

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M-o-M Free Preview - Mirror-o-matic.com

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.com - Machines

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

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33 Telescope Making ideas | telescope, diy telescope ...

Grinding my first 6" f/8 Telescope Mirror - YouTube. Sundials. Diy Telescope. Optical. Scopes. Telescopes. Tester. ... PM builds one and speaks to John Dobson, the man behind the plans, about the joys of DIY astronomy. Sundials. Projects. Reflectors. ... An edge grinding machine for telescope mirror blanks. Light Bulb. Diy Telescope. Edison ...

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Mirror Grinding Machines - an Astronomy Net ATM Forum Message

Howdy, I am going to be joining the ranks of retired people on 12/31,and I am thinking about grinding another mirror. My first mirror is an 8"/f5 that was done by hand. Since then I had to have surgery on my right shoulder,so I am wanting to build a grinding machine.

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construction 5

Mike, showing through a glass mirror darkly. Another view of the 6-footer, with various 6-footers standing around it. From left -- Ray, Chris, Mike, and Jim. Ray is messing with his diminutive 5-foot kiln there in the back. The grinding machine, with a 48" tool doing its thing. Chris is applying the grits. Here's Chris, again, slathering on the ...

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How to Make Your Own Telescope Mirror - Instructables

How to Make Your Own Telescope 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 …

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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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Building a fixed post mirror grinding machine ...

Aug 19, 2019· Gordon Waite is probably one of the better mirror makers using this machine and have incorporated some of his ideas into my plan. I like the fixed-post plan vs others with eccentric drives, because it gets the heavy grinding done in an automated manner, but still give you the chance to hand-figure.

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Buy mirror blanks for telescope making

12 Inch Mirror Blanks, 3/4" Thick: $69 + S&H (16); Shipping prices are to the USA - not shipping outside the US, sorry Combined shipping is possible - Write For a complete mirror making KIT, with all abrasives, polishing compounds, pitch, and grinding tool included, please see our Buy Telescope Mirror Kits

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How to Make Your Own Telescope Mirror - Instructables

How to Make Your Own Telescope 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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Mirror-o-Matic and fixed position tool grinding - ATM ...

Oct 02, 2005· Mirror-o-Matic and fixed position tool grinding - posted in ATM, Optics and DIY Forum: I plan on using a Mirror-o-Matic type grinding machine soon. The fixed position technique Mark Cowan uses is one I’m very interested in. Mark has spoken about this to me and on this forum, as recently as today in the thread “Grinding my 18 f/6†.

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Springfield TELESCOPE Mount 1957 How-To build PLANS from ...

It allows the user to sit in one place and move the mount, instead of having to change position. We do not photocopy these. Made from pipe parts and other commonly available hardware. & Plans from a Bygone Era.

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cryogenic grinding pdf - la-corneille-gourmande.fr

blast grinding machine india; telescope mirror grinding machine plans; grinding machine for tomatoes; hamriyah cement grinding plant sharjah; how much is a grinding mill in zim; grinding equipment spare parts; ball mill grinding outdoor plant; dry vs wet grinding of iron ore; bulgaria grinding machine manufacturer; a business plan for a ...

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

Grinding,Polishing and Figuring Large Thin Mirrors - Part 2 - Polishing Astronomy, telescope 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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Fixed-post machine grinding is where the mirror is on a turntable rotating around 20 PRM [speeds vary], and a 75% tool is on top. They are already curve-generated. The tool is hanging over the mirror by 1/6 the diameter of the tool, or about …

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Astronomy Options | Astronomy, Mirror Making, Telescopes ...

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

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Telescope Mirror Making: Part 3, Rough Grinding ...

Gordon Waite sets up his fixed-post mirror grinding machine to begin rough grinding on an 11 f/4.3 telescope mirror. He uses a grinding tool made from dental plaster and steel pieces to speed up grinding. Gordon shows the setup for spin grinding at high speeds and with added weights to get the job done as fast as possible.

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Dick Parker's Telescope 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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Mike's Telescope 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 telescope mirror blank that I made myself.

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3D 150 f8 _Solidworks_STL_STEP …

In the pipeline is a mount for this telescope to use either manually or with moto. Purchased parts -. 150 mm diameter optics set of choice, or. 150 mm diameter x 15 mm thick borosilicate blanks (x2, one for mirror, one as a tool) & grinding/polishing materials. 44 or 50 mm diagonal mirror (x1) - better to just purchase this.

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DIY Telescope: Polishing the Mirror - YouTube

Up until now, we've used abrasive grits to remove the glass, but now we'll be using a polishing compound called Cerium oxide to put the finishing touches to ...

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Mirror grinding machine - The Home Shop Machinist ...

May 14, 2004· I assume you are talking about a telescope mirror. I have read a lot and ground one small mirror some years ago but did it all by hand. If I remember properly, some of the features you want in a grinding machine are the ability to change the stroke's length as well as the path it takes across the surface (radial, cordial).

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REFRACTIONS Volume 36 Issue 2 Science Cafes

Grinding and Polishing All mirror work is done with the mirror on the turntable, mirror on bottom and the tool on top. The tools are all sub di-ameter, between 50% and 75% of the diameter of the mirror. The tools are in two pieces. A top half made of aluminum and wood with a hole in the top for the control arm.

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

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

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