Stellafane: Home of the Springfield Telpe .

Stellafane, Home of the Springfield Telpe Makers Inc., Springfield, Vermont, USA. Convention. 2020 Convention ; Past, Present Future Conventions Main Page; Past Telpe Competition Winners; Historic Convention Photos; Historic Convention Programs; Telpe Making. Telpe Making Main Page; Make a Dobsonian Telpe; Mirror Making Guide; Mirror Making Classes; .

Stellafane Reviews | Facebook

Heaven for ATM types like me. I work on 8 inch Maksutov. ALL grinding by hand. David Lessard recommends Stellafane. August 12, 2018 · Been to the annual convention 4 times in 1982, 2005, 2014, and 2015 and I enjoyed all the science and the location is outstanding. I hope to return again soon. Dave Tabor reviewed Stellafane — 5 star. August 10, 2015 · This Shrine to the Stars is an ...

gypsum grinding and polishing

Stellafane Atm Fine Grinding Gentet. Stellafane ATM: Polishing. For rough grinding a 6" mirror, about 1/2 teaspoon of grit is used per wet. With finer grits, proportionately less grit is used per wet. Grits in the25 micron range are often premixed with water to form a slurry, and water and grit are squirted onto the work together from a plastic squeeze bottle (not a spray bottle). Contact ...

home made mirror grinding polishing machine .

Stellafane ATM Mirror Making Myths. As we explain in our mirror making demonstrations at the Stellafane Convention the basic mirror making process involves grinding the mirror blank into a sphere with desired radius of curvature for the target focal length. We then. Chat Now; How microscope is madematerial manufacture

Where to buy mirror blanks? Stellafane links are .

· It''s long out of print and hard to find at a decent price, but besides having a wealth of easyto understand info about optics, the compact instructions about grinding, polishing, and figuring a mirror are pretty good. Richard Berry''''s book is a bit more modern though and has very good instructions on making a mirror. In the end, I''d believe what they tell you at Stellafane. And here at Cloudy ...

stellafane atm fine grinding .

Stellafane ATM Main Page. Fine grinding After the mirror has been rough ground to the proper sagitta, fine grinding can begin. Fine grinding on MirroroMatic can be done with the stationary overarm method. The overarm does not need to swing side to side if the tool is large enough to cover half the mirror diameter when in the neutral position described below. Get Price. MirroroMatic mirror ...

fine grinding for the uninitiated ATM, Optics .

· fine grinding for the uninitiated posted in ATM, Optics and DIY Forum: I am wondering if there is general rule about acceptable numbers of defects in a fine grinding a 6 mirror I found some holes generated at the previous grit level that arent grinding out at the current level. (they would, probably if I ground another 3 hours or so.)But I am wondering if maybe I am being too picky.

Stellafane ATM: Foucault Data Reduction Software

Stellafane Amateur Telpe Mirror Making Foucault Data Reduction Software Foucault Data Reduction Software After you take Foucault Test Measurements, you need to process, or reduce, the data, to understand the shape of your mirror surface.

Stellafane 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 insandouts of telpe making. Some people refer to it as the "secrets of the ATM''s." The person most credited with amateur telpe making and ...

How to grind a parabolic mirror for telpe ? | .

· You grind the mirror blank by rubbing it on a glass tool using increasingly fine abrasives. Then you polish the mirror and figure it to a parabola using a Foucault tester. Finally you send it away to get it coated with aluminum. A shaving mirror is not made to an accurate enough figure for astronomical use, and is not a firstsurface mirror, so produces double images.

Stellafane ATM: Grits, Polish Pitch

Stellafane, Home of the Springfield Telpe Makers Inc., Springfield, Vermont, USA. Convention. 2020 Convention ; Past, Present Future Conventions Main Page; Past Telpe Competition Winners; Historic Convention Photos; Historic Convention Programs; Telpe Making. Telpe Making Main Page; Make a Dobsonian Telpe; Mirror Making Guide; Mirror Making Classes; .

Stellafane Building the Mirror Cell in 2020 | Cell ...

Apr 25, 2020 Articles on building a Dobsonian Telpe and Newtonian Optical Tube Assembly.

Rough Grinding to Fine Grinding... When? .

· Rough Grinding to Fine Grinding... When? posted in ATM, Optics and DIY Forum: At what point do people typically stop hogging out the mirror with the larger grit and move on to finer? Im using 80 grit on my 6 mirror and am at approx fl = 41in(), and Im aiming for fl = 36in(f6). Ive read that some people choose to overshoot during the rough grinding and then go tool on top for the ...

pioneer fine grinding materials co

Stellafane ATM Fine Grinding. materials are then mixed in proper proportions and prepared for fine grinding Fine Grinding When the raw materials have been blended they must be ground into a fine powder This may be done by one of two methods Wet process or Dry process The wet process of fine grinding is the older process having been used in Europe prior to the . Get Price; Products Center ...

What are the best sources for mirror blanks? .

· The fine stuff creates too much drag for hand polishing. this is what was told to me. I do have both but am still a week or two away from putting some polishing into the blank I have. Need to finish making a grinding table and foucault tester and mirror stand first. Best of luck, Frank . Edited by Fly2High, 15 June 2016 10:22 AM.

Telpe Making Supplies

Super fine, smooth cutting, scratch free final stage abrasives.. Final lapping is the key to smooth, regular surfaces that polish out quickly with no turned edges. The professional optician knows that a very fine, closely controlled abrasive makes it possible to grind out in a few minutes slight irregularities which would take hours of polishing to correct.

Some of us are building telpes, some are grinding and polishing mirrors, some of us are repairing telpes, some of us are watching, learning and just hanging out. There are individual skills that participants can harvest off of others, and between all of us we usually solve any problem facing us regarding telpes and astronomical optics. Our next ATM session will be Saturday, January ...

Stellafane ATM Main Page

Stellafane ATM Main Page. Stellafane, Home of the Springfield Telpe Makers Inc., Springfield, Vermont, USA, Amatuer Telpe Making. Saved by Jim Cozens. People also love these ideas ...

Joy of Mirror Making: Introduction .

Fine grinding. A series of ever smaller grits are employed in order to repair the damage caused by rough grinding, concluding with aluminum oxide which leaves much smaller pits and fewer fractures compared to the silicon carbide. This stage is called fine grinding. I like to use three grit sizes, 220 silicon carbide, 500 silicon carbide, and 9 micron aluminum oxide. Another good sequence is ...

Help for a beginner, almost done with fine .

· Help for a beginner, almost done with fine grinding. posted in ATM, Optics and DIY Forum: Hello everyone, Im almost done finegrinding my first mirror: an 8 inch f/6 (which will end up being more like f/). Im currently a couple laps into 9 micron AlO2. Ive been checking for good contact with the sharpie test multiple times with each grit, and Ive had good contact...up until now.

Grinding Machine Type ATM, Optics and DIY .

· Grinding Machine Type posted in ATM, Optics and DIY Forum: Hy guys,Id like to realize a grinding/polishing machine with the following specifications: max blank diameter: 400mm (16" circa) min blank diameter: 125mm (5" circa) capable of grinding convex and concave surfaces (lenses, mirrors, Mak correctors)Considering ease of fabrication (but I have a lathe and a milling machine), grinding ...

Stellafane ATM: Fine Grinding

in the 200102 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.

Stellafane ATM Main Page

For rough grinding a 6" mirror, about 1/2 teaspoon of grit is used per wet. With finer grits, proportionately less grit is used per wet. Grits in the25 micron range are often premixed with water to form a slurry, and water and grit are squirted onto the work together from a plastic squeeze bottle (not a .

Stellafane Atm Fine Grinding Gentet

Stellafane ATM Fine Grinding Hogging out or rough grinding removed a lot of glass in a short time with very coarse grit but that left a very rough surface behind. Fine grinding and later polishing has as a major goal to smooth that surface through a series of successive refinements. Contact Supplier . stellafane atm fine grinding Catechistenopleiding. stellafane atm fine grinding Amateur ...