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Ritchey Telescope Mirror Grinding Machine

Replicating Ritchey Mirror Grinding Machine

Replicating Ritchey Mirror Grinding Machine

George Willis Ritchey built this mirror grinding machine at the Yerkes Observatory in Williams Bay, Wisconsin, in the late 1890s. Under the sponsorship of George Ellery Hale, the machine was used to grind a series of telescope mirrors starting with a 24-inch and then a 60-inch mirror for a telescope initially intended for the Yerkes Observatory.

This object is on display in the Space Science at the Steven F. Udvar-Hazy Center in Chantilly, VA. This is the electric motor that replaced the original overhead belt-driven drive on the mirror-grinding machine built by George Willis Ritchey at the Yerkes Observatory in Williams Bay, Wisconsin, in.

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Grinding Machine For Large Telescope Mirrors

Grinding Machine For Large Telescope Mirrors

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.

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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Grinding Machine Telescope

Grinding Machine Telescope

Feb 10, 2013 Reason is because a Ritchey Chretien uses two hyperbolic surfaces and is a complicated optical design. Spacing is critical. A Newtonian is much simpler in optical design and uses only one parabolic surface and a flat secondary mirror. There is actually plenty of information on how to make a Ritchey Chretien.

Stone tools go back 3.3 million years. Pounding, scraping, knapping, grinding combined with fire, heat, melting leads us today to grinding telescope mirrors from glass. Making a telescope mirror is one of the most satisfying and sublime joys you will experience. It's also arguably the most accurate surface made by man or machine. If the mirror.

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Machine For Grinding Telescope Specula

Machine For Grinding Telescope Specula

Hale had hired George Ritchey as optician and telescope builder at Yerkes. 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. 94 cast 6.5 m mirrors for the MMT (replacing the six 72 inch.

Therefore we choose the Elgin for the machine type. It will be based on the Elgin machine described in the Maksutov Circulars. The frame of the machine will be based on the machine (see photo below) that Prof Ritchey used to ground and polish the 60-inch Mount Wilson mirror. It gives us the ability to swing the grinding table from horizontal to.

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Ritchey Mirror Grinding Machine National Air And Space

Ritchey Mirror Grinding Machine National Air And Space

Oct 15, 2012 Page 1 of 2 - Making my own fixed post mirror grinding polishing machine - posted in ATM, Optics and DIY Forum Hey guys. Im thinking of making my own fixed post mirror grinding polishing and curve generating machine. Ive got loads of questions regarding the design so Ill just start firing away Do I need an eccentric moving tool to be able to polish a mirror spherical.

Mar 06, 2006 Replicating Ritchey Mirror grinding machine - posted in ATM, Optics and DIY Forum Ive just returned from a few days with friends in Washington, DC. Being aviators and aircraft builders, we blew a whole day at the new Air Space Museums new annex at Dulles airport.What really caught my attention however, was that they moved the Ritchey mirror making machine from the old Paul.

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Ritchey Mirror Grinding Machine Motor National Air And

Ritchey Mirror Grinding Machine Motor National Air And

Jul 27, 2021 Making a telescope mirror. To start, a new mirror blank is “sanded” down to create a precise parabolic curve in a process called grinding. To do that, the blank is.

Machine For Grinding Telescope Specula W. Forgan The simple addition to an ordinary lathe for the purpose of grinding telescope specula has been of so much benefit to the author that it was thought, if made known through the medium of the Society of Arts, it might become useful to others interested.

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Fixed Post Mirror Making Machine

Fixed Post Mirror Making Machine

Sep 26, 2006 Grinding and polishing your own mirrors is a long, arduous process. Instead of lapping the blank by hand, Laurie Hall built this mirror grinding machine from scratch.

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. Started project in August 2013 and at this point I am ready to move on from 25 micron White Aluminum Oxide to 9 micon White Aluminum.

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Making Mirrors For Giant Telescopes Spie Digital Library

Making Mirrors For Giant Telescopes Spie Digital Library

The I.A.U. named asteroid 17823 Bartels discovered 1998 by J.M.Roe in recognition for my contributions to amateur astronomy. Making is the Key to Knowing. A telescope mirror is arguably the most accurate surface made by human or machine. Amazingly you can grind a mirror by hand and make a telescope with simple hand tools.

By September, 1907, the world's largest telescope mirror was ready for its mount, but other equally large problems would cause further delays. (To watch a short video of Ritchey's grinding machine, now at the Smithsonian, go here. ) The majority of the massive mounting and the steel for the dome was built by the Union Iron Works in San .

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Building A Fixed Post Mirror Grinding Machine

Building A Fixed Post Mirror Grinding Machine

Grinding a Mirror For it is true that astronomy, from a popular standpoint, is handicapped by the inability of the average workman to own an expensive astronomical telescope. It is also true that if an amateur starts out to build a telescope just for fun he will find, before his labors are over, that he has become seriously interested in the.

Mar 06, 2006 Whatever their reasoning, this is the same machine that was used to grind and polish the 60 inch mirror that was initially intended for use at the Yerkes Observatory in Wisconsin. What makes this machine novel is that the overarm swings out of the way so the turntable, drive and mirror (!) can tilt 90 degrees to facilitate testing the mirror without having to move it to a test stand.

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Mirror Grinding Machine

Mirror Grinding Machine

Mar 25, 2009 Fixed post mirror making machine - posted in ATM, Optics and DIY Forum I am in the process of constructing a fixed post mirror grinding machine. This will be for grinding a 20 inch mirror. I have successfully ground a 14 inch mirror by hand. I have a 1 2 hp single phase motor, the shaft rotates at 1400rpm. I want to get this down to 40 rpm using pulleys.

Oct 13, 2019 Re Building a fixed post mirror grinding machine. Update summary Lots of work to get to this point. Things I need to probably change or fix My gearing of the DC motor. I will need a slow speed for polishing (5 rpm), and faster speeds for hogging out and fine grinding (15- 30 rpm), so likely need to think about adding a gear reduction.

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Making My Own Fixed Post Mirror Grinding Polishing Machine

Making My Own Fixed Post Mirror Grinding Polishing Machine

Mirror took one month of day and night work. Iron tools were used for grinding. Polishing took 27 hours, figuring 30 hours, and at no time did the mirror mis The secondary is a 5 convex. Figure 2 Jones, Sr., and the 20 Jones, 210 Glenwood Drive, Chattanooga, an architect by vocation and an amateur astronomer and telescope maker by avoca.

Aug 19, 2019 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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