Telpe Mirror Grinding Machines

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 ...

Ritchey Mirror Grinding Machine | National Air and Space ...

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 telpe mirrors starting with a 24-inch and then a 60-inch mirror for a telpe initially intended for the Yerkes Observatory.

Document sans nom - Astrosurf

Document sans nom. A history of polishing machines. As often in sciences and technology, Leonardo da Vinci was a pioneer, creating machines for the production of optical devices. Indeed, between 1513 and 1517, he imagined machines to grind and polish telpe mirrors, which, at the time, were made of bronze.

Rough Grinding a 20" Quartz Telpe Mirror on the Fixed ...

This video shows how to setup a mirror grinding machine for fixed-post grinding, also known as spin grinding or spinning. After setup, you'll see how abrasi...

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 …

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.

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.

Amateur Telpe Making Main Page - Stellafane

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 telpe. It is also true that if an amateur starts out to build a telpe just for fun he will find, before his labors are over, that he has become seriously interested in the ...

Mirror-o-matic

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

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 ...

How I Make Light-Weight Hexagon or Honeycomb Telpe ...

Rough grinding is complete for the 12.5 inch honeycomb-back telpe mirror blank. The rough grinding went pretty quickly and painlessly this time. I only have maybe 12 hours of actual work in the mirror so far. It's hard to believe, but the rough grinding has removed over a pound of glass. The mirror now weighs in at only only 8 pounds 15 ounces.

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. 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 ...

tut44 Making A Mirror Grinding Tool - Asterism

want to learn more about Newtonian telpes the internet is replete with information about all types of telpes. Typically, the primary mirror is made of glass. Pyrex is commonly used for the primary mirror because of its thermal stability, but for small mirrors, plate glass will work fine too. Telpe mirrors are relatively thick.

Ritchey Telpe Mirror Grinding Machine - YouTube

Excerpt from VHS video made at the Lick Observatory optical shops in Santa Cruz, CA before the object was acquired by the Smithsonian. Circa 1985.

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

The 1.3m telpe mirror blank has been completed by Peter Wangsness and is now at JP Astrocraft in Charleston, … 1.3-m Mirror Grinding Machine … Mirror-O-Matic – Dr. Debug Grinding your own telpe mirror seemed like a cool idea until I did more research and discovered all the physical …

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

Mirror Grinding Machine, G. W. Ritchey | Flickr – Photo Sharing! … grind a series of telpe mirrors starting with a 24-inch and then a 60-inch mirror for a telpe initially intended for the Yerkes Observatory. The grinding machine …

Waite Research :: 15" F4.5 Telpe Mirror

A look at a 15" Telpe Mirror, with Ronchi history. The fabrication of this 15" F4.5 primary telpe mirror began with a planoplano blank. I used my own diamond grinding equipment to generate the rough curve here. After the generation, I poured a steel grinding tool and used #40 silicon carbide abrasive to get the mirror close to the ...

Parabolizing a Telpe Mirror - BBAstroDesigns

- Myron Emerson's Amateur Telpe Mirror Making - GAP 47's machines summary - David Harbour's Understanding Foucault - Albert Highne's Portable Newtonian Telpes - Neale E. Howard's Standard Handbook for Telpe Making - Albert G. Ingall's Amateur Telpe Making, Volumes 1-3 - H. Dennis Taylor's The Adjustment and Testing of Telpe ...

Grinding Machine for Large Telpe Mirrors in 2021 ...

Mar 8, 2021 - Grinding machine for mirrors up to 42 inches [1.1m] in diameter. Can be configured for spin or stroke work.

telpe mirror grinding / polishing machine with ...

The machine is shown grinding a 300 mm mirror.How to build a tachometer:

THE AMATEUR TELPE MAKER

grinding machine. It is hardly worthy the name of machine. Basically it is only a ro­ tating vertical spindle with an iron plate on top for holding the mirror. The bear­ ings under the plate are old automobile ball bearings. These bearings are strong and steady and, although they support the weight of the rotating mirror, there is no

DIY Telpe Mirror grinding machine - YouTube

Homemade 10inch Mirror Grinding Machine.Sorry for blurred image.....

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.

Panasonic HDC-SD60 Telpe mirror grinding machine - …

just a quick vid of my home made mirror grinding machine

Making my own fixed post mirror grinding/polishing machine ...

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 …

Explore how telpe mirrors are made | Astronomy

Making a telpe 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 paired with a device called ...

Would an amateur telpe maker be able to grind a mirror ...

Answer (1 of 5): A good friend of mine, and a member of our astronomy club, has ground and polished TWO 32″ diameter mirrors! Yikes! The first one he made was damaged by the coating company, and so he set about making a second mirror! I have looked through both of them, and the images are just st...

Mel Bartels' Amateur Telpe Making

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 telpe mirror is arguably the most accurate surface made by human or machine. Amazingly you can grind a mirror by hand and make a telpe with simple hand tools.

Building a fixed post mirror grinding machine - Page 2 ...

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.

Grinding Machine for Large Telpe Mirrors

Grinding Machine for Large Telpe 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 …