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stellafane atm fine grinding

Before You Start. Use this checklist to make sure you are ready to startfine grinding: You have completed RoughGrinding, and all the tools and materials used in roughgrinding, most of which are also used infine grinding.; You have the necessary Grit.; You have Plastic Bottles to hold grit-water slurry for your finer abrasives.; You have a Magnifying Lens to inspect pit sizes on your mirror ...

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StellafaneMirror Makers   Posts |Facebook
StellafaneMirror Makers Posts |Facebook

Another class photo from November 2014. Displayed for our students is an historic telescope made in the 1970s by STM Member Art Crowe. This instrument was recently donated toStellafaneby Art's family and will be shown at the 2015 Convention. It was the subject of a Gleanings ForATMsarticle in the January 1972 issue of Sky & Telescope.

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MirrorGrindingResearch
MirrorGrindingResearch

Stellafane ATM: Grits, Polish & Pitch IntroductionMaterialPolishing CompoundsPitchHow Much Will I Need?Safe Handling & Storage Grit is a generic name for the abrasive particles used with a hard tool in rough andfine grinding. Polish (or Polishing Compound) is a generic name for the abrasive used with a soft Pitch tool in polishing and figuring.

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Stellafane2008.
Stellafane2008.

Apr 10, 2018·Stellafanesits on roughly 90 acres of land that is known as the mecca for Amateur Telescope Makers. Legions of amateur telescope makers travel to Breezy Hill in Springfield Vermont. They come there to discuss the design, manufacture and the ins-and-outs of telescope making. Some people refer to it as the “secrets of theATM’s.”

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MirrorGrindingTelescopemirrorGrindingTool
MirrorGrindingTelescopemirrorGrindingTool

Stellafane ATMMirror Making Myths.Fine grindinga telescope mirror The Joy of Mirror Making the mirror back must be ground flat or at least regular in shape before beginningfine grindingthe mirror s face Cast a tool specifically for the mirror s back and grind with 220 grit inspecting for low unground spots Grind until they disappear .

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Stellafane ATM: Mirror Making Overview
Stellafane ATM: Mirror Making Overview

Fine Grinding. The purpose offine grindingis to smooth the surface generated by roughgrindingand to get "good contact": ... Details of each step are provided in subsequent pages, along with plans to build your own tester - go back to theStellafane ATMIndex Page to find and read them.

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Mirror Grinding Research
Mirror Grinding Research

Stellafane ATM: Grits, Polish & Pitch IntroductionMaterialPolishing CompoundsPitchHow Much Will I Need?Safe Handling & Storage Grit is a generic name for the abrasive particles used with a hard tool in rough andfine grinding. Polish (or Polishing Compound) is a generic name for the abrasive used with a soft Pitch tool in polishing and figuring.

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#2000 grit vs 5 micron aluminum oxide  ATM, Optics and
#2000 grit vs 5 micron aluminum oxide ATM, Optics and

Jan 31, 2011· #2000 grit vs 5 micron aluminum oxide - posted inATM, Optics and DIY Forum: hi there, currently I am at the final stage offine grindinga 8 plate glass mirror before polishing. I do have #2000 silicon carbride, and 3, 9 micron white aluminum oxide lapping powder brought from Willimann Bell, and 5 micron white aluminum oxide from Gotgrit in hand, just curious, - is white aluminum oxide ...

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Joy of Mirror Making: Introduction   BBAstroDesigns
Joy of Mirror Making: Introduction BBAstroDesigns

Fine grinding. A series of ever smaller grits are employed in order to repair the damage caused by roughgrinding, concluding with aluminum oxide which leaves much smaller pits and fewer fractures compared to the silicon carbide. This stage is calledfine grinding.

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What do mirror pits look like?  ATM, Optics and DIY Forum
What do mirror pits look like? ATM, Optics and DIY Forum

Jan 08, 2016· What do mirror pits look like? - posted inATM, Optics and DIY Forum: Imfine grindingmy mirror right now, using Stellafanes guide.Stellafanefails to mention what pits are exactly, and what they look like. Could anyone tell me?

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stellafane atm fine grinding
stellafane atm fine grinding

StellafaneLinks Page. Sep 29 2010· MirrorGrindingMachineposted inATMOptics and DIY Forum I have some interest in building agrindingmachine for possible up to an 18 mirror but something that will also do a 6 or 8 mirror.GrindingOn the picture below the machine isfine grindingan 8 inch mirror with an 71 tool (143 mm .Fine grinding.

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Help for a beginner, almost done withfine grinding.  ATM
Help for a beginner, almost done withfine grinding. ATM

Mar 27, 2013· Help for a beginner, almost done withfine grinding. - posted inATM, Optics and DIY Forum: Hello everyone, Im almost donefine-grindingmy first mirror: an 8 inch f/6 (which will end up being more like f/5.5). 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.

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varities available infine grinding
varities available infine grinding

Stellafane ATM: Fine GrindingHogging out, or roughgrinding, 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.

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Mirror o Matic mirror making machine  ATMpages of
Mirror o Matic mirror making machine ATMpages of

Mirror-O-Maticgrindingmachine. 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 handgrindingbig mirrors is not something very beneficial for the hands of a musician.

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Stellafane Links Page
Stellafane Links Page

StellafaneExternal Links provide links to related information on Amateur Telescope Making, Mirror Making, Optics, other Astronomy clubs and local area links to the Springfield, Vermont area. A large list of links to other web sites we hope you will find useful.

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Stellafane2015   New Horizons   Pluto   Astronomy Clubs
Stellafane2015 New Horizons Pluto Astronomy Clubs

May 19, 2006· All of the others thru-out the weekend were 'typicalStellafane' - mostly interesting. I attended some of the mirrorgrindingpresentations ( I currently have two 8" infine grinding), and they mentioned that there was far more interest in mirror making this year than in the last several.

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varities available infine grinding
varities available infine grinding

Stellafane ATM: Fine GrindingHogging out, or roughgrinding, 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.

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Mirrorgrindingvideo?  ATM, Optics and DIY Forum
Mirrorgrindingvideo? ATM, Optics and DIY Forum

Sep 04, 2005· I forgot all about thatstellafane ATMsite. I just looked at it, pretty nice. But if you have never made a mirror, I still think the dobson video gives you a real appreciation of all the facets fromgrinding, to making a pich lap to polishing and figuring. It truely is a classic film to watch and enjoy. I hope you can somehow get your hands on it.

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Stellafane ATM: Materials & Tools
Stellafane ATM: Materials & Tools

The Tools:Grinding& Polishing. You will need two tools: A hard tool for rough andfine grinding, and a soft tool, or pitch lap, for polishing and figuring. Traditionally, the pitch lap was made on top of thegrindingtool. We recommend using plaster disks for tool …

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Wooden Telescope Part 1: the Mirror : 14 Steps (with
Wooden Telescope Part 1: the Mirror : 14 Steps (with

Wooden Telescope Part 1: the Mirror: This is the first of a 2 part Instructable explaining how I built a wooden telescope from scratch. In this part, I will show you how you can build the key element of a telescope: The primary mirror.A good mirror will show you details on the moon, ...

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mirrorgrindingtool
mirrorgrindingtool

Stellafane ATMMirror Making Overview. Mirrorgrindingand figuring consists of four major steps (plus aluminizing). Rough andFine grindinguse hard tools (glass tile or metal) and harder then glass abrasive grit (Silicon Carbide or Aluminum Oxide). Polishing and Figuring use a soft pitch tool and ultrafineabrasive (Cerium Oxide or Rouge).

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Stellafane ATM: Rough Grinding
Stellafane ATM: Rough Grinding

This page describes the roughgrindingprocess. Before You Start. Use this checklist to make sure you are ready to start roughgrinding: You have selected a mirror diameter and focal ratio, and have use these to calculate a target sagitta.; You have a way to measure sagitta.; You have an appropriate size mirror blank, you have selected a surface to grind, and you have beveled the edge.

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