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Mirror-o-Matic. · Before starting machine grinding and polishing, one should at least read several books on mirror making. Most of these books will be about hand work, but knowledge of calculating and measuring a sagitta,pouring pitch laps, building tile tools, and most importantly reading and interpreting the Ronchi and Foucault tests are extremely important.

A 6" or 8" mirror should take about 40 to 80 hours of effort. While this is a non-trivial amount of time, the mirror can be completed in a few months, and certainly within a year. Most people work one to three hours a day on their mirror about one or two times a week. Homemade Mirrors are …

This page lists various telpe related formulas and it calculates telpe & mirror parameters for you. It is primarily oriented to the Newtonian reflecting telpe, which is what most first time telpe makers build, although many sections of it are applicable to other types of telpes.

Topics on this page: Mirror Blanks, Grinding & Polishing Tools, Grits & Pitch, Storage Containers, Grinding Stands, and Miscellaneous Items. 6" & 8" Pyrex Mirror Blanks Patterns on surfaces and edges are mold marks, splotch on 6" is a grinding mark by the manufacturer. Two blanks are in their protective cardboard shipping sleeves. ...

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 (visible at ...

D.R. Machine Tools is the professional Steel Polishing Machine Manufacturer in India. Founded in 2010, and we have been producing and supplying tools and machines such as steel polishing machine, tube polishing, rod polishing, pipe polishing, pipe notching, polishing accessories, flat surface polishing, buffing polishing, mirror polishing and grinding process machines for years and …

Mirror Grinding Machine. Mirror Polishing Machine. Small Grinding & Polishing Machine . Edging Machine. Null Tester. Focussing Units. Tube Fittings. Worm Drives. Perforating. Optical Workshop Equipment. Spindle Nose & Adaptors. Slip Ring Seting Circle. Mirror Cell ...

Here is a blank with the rough edge ground down and trued up. It only takes a few minutes on the grinding machine I built for the job. Here is the super simple grinding machine I built to true up the edges of the blanks. It is just an angle grinder with a masonry wheel mounted on the edge of a table.

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Internal Grinding Machine, 1 of 21 . Material: Hy-Lift Johnson only uses castings and forgings of the highest quality material that are made in the USA. Our casting supplier has been supplying us for more than 60 years. ... you need to see yourself use the mirror in the bathroom and leave the Cam Face surface finish to the people

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 …

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 telpe (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.

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.

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.

Multipurpose Belt Finishing. Metal Sheet Finishing. FG220 ZK HD – Heavy Duty Flat Grinding Machine Miguel T15:32:42+00:00. FG220 ZK HD – Heavy Duty Flat Grinding Machine Videos, Flat bar, Square Tubes Finishing. 1600mm Capacity – Deburring Machine Getting Wider Miguel T09:23:45+00:00.

Rough Grinding. Unless the mirror comes pre-generated, the initial curve will have to be ground into the mirror. A ring tool of half the diameter of the mirror used on top of the mirror's flat face with the coarsest grit will rapidly grind a spherical curve into the mirror. Grinding a 6 inch [15cm] mirror to F/2.8 using a ring tool. Mirror ...

(4) Roy K. Ensign - Lead optician in producing the 30-inch (0.76-m) SRO mirror, built the mirror grinding machine, ground, polished and figured the 30-inch mirror, observer for Lunar Mapping Project. (5) Harold J. Ireland - with George Moyen (8) designed the electrical system for the observatory.

is my father's garage where he is currently working on his telpe hobby. The Diamond curve generating machine in this vi...

Grinding Machines • Hand grinding takes several days • Grinding machines designed to create exact same pattern • Can adjust stroke, positions etc – auto rotates mirror and tool • …

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mirror grinding mashinee - Newest Crusher, Grinding Mill ... Rough Grinding a 20" Quartz Telpe Mirror on the Fixed-Post Machine. This video shows how to setup a mirror grinding machine for fixed-post grinding, also known as spin grinding or spinning.

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Its a near Mirror o Matic mirror grinding machine.....It runs at 50 RPM fixed, The eccentric has dual speed, 17 RPM & 41 RPM.I built it in 6 months.....Sum...

MIRROR GRINDING MACHINE. I made my first mirror grinding and polishing machine over thirty years ago. It used the working principle of the machine illustrated at "A" Fig.3, Page 163, "Amateur Telpe Making" Book 1. A bowl which rotated was fitted …

Hybrid-Hindle grinding/polishing machine for telpe mirrors and lenses.

For hand grinding, the coarse grit sequence of 40, 60, 80, 120, 220 is typical (start at the grit size appropriate for your mirror diameter as given in the section above). Silicon Carbide is used almost exclusively. Fine grit sequences vary more, and are often adjusted based on the supplies at hand.

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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 for stroking …

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