Page 1 of 3 - Mirror Grinding - Take A Class Or DIY? - posted in ATM, Optics and DIY Forum: Ive been interested in grinding/polishing my own Newt mirror for a long time but dont know how to get started. As a beginner, would you recommend attending a workshop or class or is it possible to make a good mirror using other learning resources such as books and online videos?
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Rock Rascal Lapidary Equipment for Grinding and Cutting. · Here is an example of a hole we drilled with this drill press. Starter Kit for Carvers 12 pieces - 150 grit. $75.00. Lasco Starter Kit for Carvers. This is a basic starter set for carving and includes 12 pieces of various shaped diamond grinding bits in 150 grit …
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Fine grinding, typically the last step before polishing, is now a relatively labor-intensive task that drives up the cost of precision optics. Fine grinding is a sensitive operation. The relatively fast speed of the grinding tool must be slowed down as it approaches the lens for fine grinding.
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Fine Grinding a 20" Quartz Telpe Mirror. Rough Grinding on the Fixed-Post Mirror Grinding Machine. Hogging the Curve on a 20" f/4.5 Quartz Telpe Mirror. SkyBadger – Mirror Grinding Machine. ... Stellafane ATM: Materials & Tools.
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Getting good contact in the last stages of fine grinding is paramount. Assuming the Sharpie test passed, the turned edge likely came from initial polish. The temptation during initial polish is to let the machine run for a long time at one setting. ... Telpe Makers at …
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Stellafane ATM Main Page. Stellafane, Home of the Springfield Telpe Makers Inc., Springfield, Vermont, USA, Amatuer Telpe Making ... Grinding a 25-Inch F3 Telpe Mirror: Thinning and Flattening the Back. ... After 'super fine' grinding, I …
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Stellafane ATM: Fine Grinding. Fine grinding, and later polishing, has as a major goal to smooth that surface through a series of successive refinements. The criteria for switching grits, therefore, is: ... Then grind one wet, or at least grind "once around the barrel", with the normal stroke (See …
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Fine Grinding. The purpose of fine grinding is to smooth the surface generated by rough grinding and to get "good contact": ... Details of each step are provided in subsequent pages, along with plans to build your own tester - go back to the Stellafane ATM Index Page to find and read them.
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Stellafane ATM Main Page. Stellafane, Home of the Springfield Telpe Makers Inc., Springfield, Vermont, USA, Amatuer Telpe Making ... Grinding a 25-Inch F3 Telpe Mirror: Thinning and Flattening the Back. ... After 'super fine' grinding, I moved …
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Stellafane ATM: Fine Grinding. A typical grit sequence for an 8" mirror that did rough grinding with #60 grit would be: Silicone Carbide: #80, #120, #220 Aluminum Oxide: 32, 20, 12, 5 micron Often, #320 Silicon Carbide is used instead of 32 micron Aluminum Oxide, and #500 is used instead of. Get Price
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Please follow the this link from stellafane to learn and do it correctly. There are 2 major steps in grinding process. Rough Grinding – You start with courser abrasive like Silicon carbide #60 or #80 grit to hollow out the mirror quickly and move to the medium ones i.e. …
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Stellafane Atm Grits Polish Pitch. 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. ... Fine grinding abrasive materials is typically needed to create particle sizes in the minus 50 mesh range 297 microns down to about 95 minus 325 mesh ...
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Stellafane ATM: Fine Grinding. A typical grit sequence for an 8" mirror that did rough grinding with #60 grit would be: Silicone Carbide: #80, #120, #220 Aluminum Oxide: 32, 20, 12, 5 micron. Often, #320 Silicon Carbide is used instead of 32 micron Aluminum Oxide, and #500 is used instead of 20 micron…
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Stellafane 2008. Printed in Reflections: September, 2008. Stellafane sits on roughly 90 acres of land that is known as the mecca for Amateur Telpe Makers. Legions of amateur telpe makers travel to Breezy Hill in Springfield Vermont. They come there to discuss the design, manufacture and the ins-and-outs of telpe making.
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stellafane atm fine grinding jaw stone crusher with iso90012008 reliable company ball grinding 03 rock phosphate grinding modern techniques list of heavy industries in kanpur worldcrushers stone crusher plant in sangli maharahtra pabrik suku cadang pasokan dan permintaan ...
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Finally work as slowed down just enough that I could slip away on Tuesday (10/29) to check in at the mirror grinding workshop. I brought my blank along. I consulted about how to start, and as a result I decided I should build a box to store the mirror and tool in and, before making…
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Fine Grinding tools High-performance ceramics for surface finishing Fine grinding tools made of FRIALIT-DEGUSSIT Oxide Ceramics DEGUSSIT fine grinding tools are free of bonding agents and, due to the extreme hardness of the sintered aluminium-oxide crystals, have excellent resistance to wear and deformation.
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The goal here is to remove the rough surface left during fine grinding and obtain a smooth reflective surface. During this step we'll switch from mechanical grinding ... An ATM reference. Stellafane, thorough documentation for telpe makers. bbastrodesign, Mel Bartels. Modern approaches to mirror making and telpe designs.
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Stellafane Mirror Makers. December 19, 2014 at 3:04 AM · ·. Mirror class student Keith putting the final correction into his 6" parabola on 12/13. He began this project in 1994 but put it aside as life happened. Keith is an award winning lecturer at a local college.
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Fine grinding: includes Fine grinding, Measuring Sagitta; Polishing: Foucault Testing; Ronchi testing; Spectators are welcome to look and listen, but please don't touch anything unless invited by one of our instructors. Let's Get Started! The Stellafane Telpe Makers have a great website that will help you get started! Overview of Mirror ...
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It is dedicated for large-area ground polishing and grinding. Match most models on the market. Grinders, grinders, polishing machines and other models on the market can be used; suitable for large-area ground grinding, grinding and polishing. 1. Scientific seam design. …
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Once the fine grinding with the finest abrasive is done, next step is polishing. Many people won't believe if you show them the ground mirror and tell them that it will be polished to a mirror finish. OK, you need following to start the polishing… Pitch Lap (follow the link to see how the pitch lap was made) Polishing Mix (cerium oxide)
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While living in Vermont, I visited Stellafane as often as possible. Our local Astronomy Club (in Burlington,VT.) was also big into ATM'ing. In fact, the winter months didn't give you much observing time, so there was plenty of time for grinding mirrors. Take a quick trip to the Stellafane website, I'm certain you will bookmark it if you do.
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$68 Dorman 620-298 Air Conditioning Condenser Fan Assembly Automotive Replacement Parts
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Stellafane ATM:Mirror Making Myths With the Mirror on top, the tool on the bottom, and coarse grit in between, we start grinding with the mirror overhanging the tool. We rub the center of mirror against the edge of the tool, and this wears a depression in the center of the mirror (the edge of the tool wears down also, so that the tool becomes ...
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Mirror Cell and Focuser. For the mirror cell, I made the push-pull variety described on the Stellafane site. The lower board of the cell I expanded in size so that it fits more snuggly into the back end of the telpe. The entire cell is held in place by three long bolts that pass through the lower mahogany ring and tube into T-nuts.
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Stellafane ATM Materials Tools. 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 . Chat ...
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Looking for advice for building Foucault tester - posted in ATM, Optics and DIY Forum: Hello all, First time poster here. Im very excited to be working on my first telpe mirror, a 6 f/8. Really enjoying the process. I am currently progressing through fine grinding and as I get close to the polishing stage Im looking to build a Foucault tester.
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After four hours of using the ring tool with 60 grit, I sufficiently reached the goal-spheroid of FL 78" that we decided to move from ring tool to tile tool. (1) we traced the circumference of the mirror over a mat of porcelain tiles and cut the mat into the circle with a wet saw.…
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in the 2001-02 Stellafane Mirror Class. Fine grinding refines the basic shape you have ground into the surface of the glass with rough grinding. The sequence of ever finer grits that you use smoothes the rough surface that was made in rough grinding, and prepares you for polishing. You are also refining the shape of the surface to be a section ...
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Recorded at the Stellafane Mirror Workshop - No Audio - Using very fine grit (Aluminum Oxide) but the same stroke, albiet with more effort and therefgore a slower pace, is used for rough grinding and polishing. This is an 8" mirror, so the stroke overhang is about 1.3" on each side for a 2.6" stroke length.
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Stellafane ATM: Materials & Tools. 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 …
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Question about operating a Stellafane Foucault tester - posted in ATM, Optics and DIY Forum: Hello, Id like to make a Foucault tester. I read Stellafane instruction and Im still not sure how to operate the tester, and have some questions about the parts: Where do I put my eyes? Is it the same as hole (A) where the knife edge is? The tutorial says turn the knob so the head rotate about the pipe ...
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Finishing Up Fine Grinding. As the grit sizes got smaller and smaller, the possibility of scratches from dust and stray grit particles increases. I was doing all my work in my dusty garage workshop and to help avoid scratches I attached a large sheet of plastic drop cloth on …
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During the grinding process, only the depth of the concave surface is measured. Good grinding technique will produce a spherical shape, therefore the only important property needing measurement is the depth of the concave surface at the center of the mirror. The easiest way to do this is by placing a stiff
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