Homemade Telpe Lens Grinding Machine April 25, 2014 by gustaf17 Leave a comment Check out this descriptive page listing a few devices created by amateur telpe enthusiasts that developed their own methods and tools for creating lenses.
My Mirror Grinding Machine. For a long time I've wanted to build a machine for grinding telpe 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, …
Treas. and Pres. of the Amateur Telpe Makers of Long Beach, 319 Hermosa Ave., Long Beach, Calif. "IN the March issue of Scientific American . you mentioned your hope of hearing from those who are grinding 20" Pyrex mirrors. Here is our bid for membership in the Twenty-Inch Club. "We received our solid disk on January 9.
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 …
L.B. Bohle Maschinen und Verfahren . L.B. Bohle is the most innovative technology company in the planning and implementation of machines and processes for the pharmaceutical solids production. As a technology leader in machines, systems, and processes for the pharmaceutical tablet manufacture, we offer retail or all-in-one solutions for the ...
A grinding machine relieves the …, Sky and Telpe magazine starting on page 75 carries … A lot of work went into preparing the mirror for initial grinding! Grinding and Testing a Telpe Mirror – The St. John's …
A telpe is a device used to form images of distant objects. The most familiar kind of telpe is an optical telpe, which uses a series of lenses or a curved mirror to focus visible light. ... 9 The polishing machine is similar to the grinding machine, but the tool is made from pitch—a thick, soft, resinous substance derived from ...
Lens grinding and polishing is very delicate and precise work. It is also very heavy manual work and very time-consuming. To lighten this hard labour for himself, Christiaan designed and built his own lens-grinding and -polishing machines (Figure 2). One of the greatest problems with lens grinding is to make a suitable lap by
Mel grinding the back side of a 30 inch mirror over a full sized tiled tool; you can see the other 30 inch in the left background. Rough grinding is hard and messy. After rough grinding most of the tool is in contact with the mirrors though it is clear that some of the Hydrostone leaked under the tiles. I spent 3 hours apiece, total of 6 hours.
Very old mirror/lens grinding machine. This machine can grind and polish using different stroke patterns, i.e. w-stroke, short strokes, long strokes, etc. C...
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 ...
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.
CO-Z 850W Drywall Sander with Vacuum Attachment Dust Collector, Electric Pole Sander Machine for Wall Grinding with Extendable Handle 5-Speed LED Lights and 12 Sanding Discs 2 $159.99 $ 159 . 99 Goplus 750W Drywall Sander, Electric Foldable Sander Machine w/Dust-Free Automatic Vacuum System, 6 Variable Speed 800-1750 RPM, Double-Deck LED Lights ...
Grinding with Washers Grinding Large Thin Mirrors Part I 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 ...
The Tools: Grinding & Polishing. You will need two tools: A hard tool for rough and fine grinding, and a soft tool, or pitch lap, for polishing and figuring. Traditionally, the pitch lap was made on top of the grinding tool. We recommend using plaster disks for tool substrates, and that you use separate disks for these two tools.
PZX 5-Axis Prism Grinding Machine. The PZX prism grinding machine is the latest solution for companies looking to enhance their prism manufacturing capabilities. Machine prisms up to 6″ thick with a maximum diameter of 10″ for the longest diagonal.
Grinding it down.. to the wrong specifications. Grinding it down very accurately to the wrong specifications. Black paint had chipped off a screw in the focal testing device, exposing the shiny metal, and they were focusing on that instead of the intended point light source. It was still focusing very accurately, just slightly off axis.
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 of Inferior Optical Quality.
To begin grinding operations a small pan partly filled with #220 or #240 carborundum or Aloxite mixed with water is placed nearby with a one inch paint brush in it to apply the mixture to the surfaces. ... You are referred to Amateur Telpe Making, books 1,2 and 3, S & T Gleaning, De Vany Texereau, et al. We left off above with two ...
Theories on designing a robotic mirror grinder. - posted in ATM, Optics and DIY Forum: So I have been thinking and doing some preliminary design work on a robotic telpe grinding machine with the intent to grind a 12 inch parabolic primary mirror for a telpe I intend to build. I have been trying to understand the mechanics behind grinding a telpe …
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 …
this latest installment, we show the preparation for the glass casting. At the end, we show our home-made way to grind the ed...
Fine grinding and polishing of Segment 2 took less than half the calendar time as the same operations for Segment 1. Development of tests for the GMT off-axis segments was a major challenge. Like all modern telpe mirrors, they are measured with an interferometer and a null corrector, shown in Figure 12. The null corrector converts a ...
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.
May 2, 2018 - Explore Gene Cross's board "Telpes for Amateur Astronomers", followed by 253 people on Pinterest. See more ideas about telpes, astronomer, telpe.
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. With such a telpe, Saturn with its rings are stunning. The telpe enables our vision quest.
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.
Grinding is also often utilized to remove significant amounts of material to bring a stock sheet or plate to precise dimensions. To do this, machine shops primarily utilize surface grinders with a reciprocating table and a horizontal spindle that turns the grinding wheel, but the process is very slow.
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.
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 …
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 ...
Amateur Telpe Making Main Page. "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 ...
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.
NC grinding of aspheres has been done but a sufficiently stiff machine with adequate resolution encoders is required together with sufficiently accurate (sub micron) metrology so that achievement of the desired shape can be confirmed before polishing. IIRC REOSC used computer controlled fine grinding on the VLT primary meniscii.
Page 1 of 2 - Constructing a Grinding Machine for large apertures - posted in ATM, Optics and DIY Forum: Ive been using a 4.5 equatorial from Orion for many years now and Ive finally got the time and money to build a telpe from the ground up. Unfortunately my local astronomy club has no-one with experience with ATM-ing. Given how interested I am on the …
Bill W, Ian K, David G, and I (Guy B) modified an existing quasi-Mirror-O-Matic machine by changing pulley ratios and changing it into sort of a Draper machi...
Using the Telpe Mount. One late afternoon, I set up the telpe to see how well the new mount functioned. The truss tube section attached to the mirror box without any problems. The telpe did require a ~6 lb weight in the back to get it properly balanced. When the first stars appeared I aimed the telpe at one of them and took a look.
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.
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.
