mirror grinding making

mirror grinding making

tut44 Making A Mirror Grinding Tool - Asterism.org

After fine grinding is complete, the mirror must be polished. It is during polishing that you “figure” the mirror by using a different polishing stroke to change the mirror’s spherical polished shape into a parabolic polished shape . See a related tutorial nearby titled,

Joy of Mirror Making: Rough Grinding - BBAstroDesigns

31 行 · Here is a 25 inch [635cm] mirror being rough ground followed by a beautiful grinding stand

Mirror grinding - scope making

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 ...

Making a homemade mirror grinding machine - ATM,

Mar 06, 2006 · The larger one is for grinding and polishing mirrors and is also used at higher speeds to centrifugally cast resin mirrors, an experiment I am playing with in my spare (sic!) time. The smaller mirror is used for power wrapping epoxy impregnated fiberglass around mandrels for making tubes and cylindrical components for open trusses.

Mirror Grinding Machine

My Mirror Grinding Machine. For a long time I've wanted to build a machine for grinding telescope 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, pulleys, etc. Most of them came from industrial junk yards.

About this site

Apr 15, 2018 · The condensed process of making a tile tool that will be used to grind my 8.5 inch telescope mirror. Making a mould around the Pyrex disc, mixing and pouring...

tut44 Making A Mirror Grinding Tool - Asterism.org

After fine grinding is complete, the mirror must be polished. It is during polishing that you “figure” the mirror by using a different polishing stroke to change the mirror’s spherical polished shape into a parabolic polished shape . See a related tutorial nearby titled,

Mirror grinding - scope making

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 ...

Stellafane ATM: Mirror Making Overview

Mirror Grinding at the Spring 1998 Stellafane Mirror Workshop in the McGregor Observatory Rough Grinding. The purpose of rough grinding is to start to cut a spherical concave surface into the mirror blank. For a 6" mirror with a 48" focal length, the depth of the curve is 0.047". A full sized tool is rubbed against the mirror blank, with a wet ...

TELESCOPE MIRROR MAKING HOW TO: Fine Grinding - YouTube

Apr 12, 2020 · In this video I am showing you how to make a DIY telescope mirror! This is the second part in the series, showing fine grinding in a step by step tutorial.

Grinding a 25-Inch F3 Telescope Mirror: Thinning and ...

Dec 16, 2014 · Gordon started with a 2" thick telescope mirror that weighed about 70 pounds. By thinning the blank, he's lightened the mirror by about 20 pounds! This vid...

Making a Mirror grinding & Polishing machine - ATM, Optics ...

Mar 16, 2015 · Page 1 of 5 - Making a Mirror grinding & Polishing machine - posted in ATM, Optics and DIY Forum: Hello, I am on the half of the way to make a mirror grinding machine inspired by original M-O-M design. I made the pulley arrangement such a way that, both the turn table & eccentric spins at 50 RPM fixed. I wont go for making mirror bigger that 10.5 (or max 12).

Build your own telescope part 1: The mirror – Thomas ...

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 telescope (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.

Telescope Mirror Kits - Amateur Telescope Making Supplies

Please note that our kits do not include a grinding tool or pitch lap. If you need materials for making a grinding tool or pitch lap, we have them available on our Tools page. A

Mirror-o-Matic mirror making machine - ATM pages of ...

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.

Joy of Mirror Making: Introduction - BBAstroDesigns

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 Making Zen. Do one thing at a time. Mirror making is a process: 1. Get blank, grit, pitch 2.

Joy of Mirror Making: Fine Grinding

The goals of fine grinding are to prepare the curved mirror face so that it is ready for polishing and figuring and make any adjustments of the focal length. Previously in rough grinding we deepened the center of the mirror's face either by grinding with coarse grit and a tool, slumping in a kiln over a mold, or purchasing the glass pre-generated.

Astro-Tel - Mirror grinding machine

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 Telescope Making" Book 1. A bowl which rotated was fitted to the spindle. I also

Hubble Space Telescope - Wikipedia

The Hubble Space Telescope (often referred to as HST or Hubble) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation. It was not the first space telescope, but it is one of the largest and most versatile, renowned both as a vital research tool and as a public relations boon for astronomy.The Hubble telescope is named after astronomer Edwin Hubble and is ...

At Your Service by CollaredKid on Newgrounds

1 天前 · At Your Service. Mrs. McClain looked down at the unsigned contracts and performance deals scattered around her on the floor. An eager smile cracked along her ruby lips as she looked them over one by one. Those generously endowed tits of hers hardening at the thought of all the money she would be making sooner rather the later.

Joy of Mirror Making: Fine Grinding

The goals of fine grinding are to prepare the curved mirror face so that it is ready for polishing and figuring and make any adjustments of the focal length. Previously in rough grinding we deepened the center of the mirror's face either by grinding with coarse

Grind and Polish a Dobsonian/Newtonian Telescope Mirror ...

You'll need to do a number of wets to get through rough grinding. What we are doing here is simply shaping the mirror to the desired sagitta, then the rest of the work will be progressively making the surface of the mirror smoother and smoother. The video shows about 30 minutes of this process on another mirror that I'm making for my nephew.

Mirror Grinding Machine | Hackaday

Sep 26, 2006 · Grinding and polishing your own mirrors is a long, arduous process. Instead of lapping the blank by hand, Laurie Hall built this mirror grinding machine from scratch.

Telescope Mirror Making

For grinding the back of my 12" mirror, I used an 8" disk of 3/4" particle board, glued tiles to the front with epoxy, and coated the back and sides with polyurethane. It worked great. I made my polishing tool for my 12" mirror out of three layers of 3/4" particle board glued together.

Mirror grinding | Diy telescope, Refracting telescope ...

Grinding a 25-Inch F3 Telescope Mirror: Thinning and Flattening the Back. Gordon started with a 2" thick telescope mirror that weighed about 70 pounds. By thinning the blank, he's lightened the mirror by about 20 pounds!

Making my own fixed post mirror grinding/polishing machine ...

Oct 15, 2012 · 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 mirror spherical?

Explore how telescope mirrors are made | Astronomy

Jul 27, 2021 · Making a telescope mirror. To start, a new mirror blank is “sanded” down to create a precise parabolic curve in a process called grinding. To do that, the blank is

Mirror-Making Workshop - Texas Star Party

You should provide your own materials including mirror, mirror tool and pitch lap, abrasives, etc. We will have some instruction sessions, about an hour or more each day on: Set up & rough grinding: includes Getting set up/overview, Making the Tile Tool, Rough grinding; Fine grinding: includes Fine grinding, Measuring Sagitta; Polishing ...

jeffbaldwin.org

Fixed-post machine grinding is where the mirror is on a turntable rotating around 20 PRM [speeds vary], and a 75% tool is on top. They are already curve-generated. The tool is hanging over the mirror by 1/6 the diameter of the tool, or about 1/8 diameter of the mirror, and is fixed in this position.

Fixed post mirror making machine - ATM, Optics and DIY ...

Mar 25, 2009 · Fixed post mirror making machine - posted in ATM, Optics and DIY Forum: I am in the process of constructing a fixed post mirror grinding machine. This will be for grinding a 20 inch mirror. I have successfully ground a 14 inch mirror by hand. I have a 1/2 hp single phase motor, the shaft rotates at 1400rpm. I want to get this down to 40 rpm using pulleys.

Telescope Mirror Making: Part 3, Rough Grinding ...

Gordon Waite sets up his fixed-post mirror grinding machine to begin rough grinding on an 11 f/4.3 telescope mirror. He uses a grinding tool made from dental plaster and steel pieces to speed up grinding. Gordon shows the setup for spin grinding at high speeds and with added weights to get the job done as fast as possible.

Making a Mirror grinding & Polishing machine - Page 2 ...

Mar 16, 2015 · Page 2 of 5 - Making a Mirror grinding & Polishing machine - posted in ATM, Optics and DIY Forum: The machine I made is just driven by a drill press and pulley system. Variable speeds could be nice, but so far this system has worked. The turntable goes about 40 RPM for spin grinding and polishing, which works quite well. I can add a reduction and the table then goes about 6.5 RPM, which

Woodware: Mirror Grinding Stand

Now days it is easer to buy finished mirrors than grinding kits to make them. Still grinding your own mirror is a key skill that makes you a real telescope maker. To grind a telescope mirror by hand you simply attach a glass tool the same size as your mirror blank to the top of a small, strong stand. You apply grinding compounds to the tool and ...

53 Telescope Mirror Making ideas | telescope, telescopes ...

Jun 8, 2017 - Explore Neil Aubrey's board "Telescope Mirror Making" on Pinterest. See more ideas about telescope, telescopes, diy telescope.