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mirror grinding tool

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mirror grinding tool

Mirror grinding and figuring consists of four major steps plus aluminizing Rough and Fine grinding use 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 ultra fine abrasive Cerium Oxide or Rouge

tut44 Making A Mirror Grinding Tool
tut44 Making A Mirror Grinding Tool

Making A Mirror Grinding Tool By Allen Malsburry The average person would never think “I can make my own telescope” Most amateur astronomers believe “I can buy a better telescope than I can build” Neither is actually correct For many decades now amateur

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Stellafane ATM Make a Tile Tool
Stellafane ATM Make a Tile Tool

The well used tile tool at right illustrates a couple of maintenance issues 1 Tiles Grind Away You may grind through your tiles at the edge especially if you are making a very fast low focal ratio mirror In that case you can epoxy a second layer of tiles on over the first This was done with the tool

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Joy of Mirror Making Fine Grinding  BBAstroDesigns
Joy of Mirror Making Fine Grinding BBAstroDesigns

Grinding also proceeds quicker because the tool spends more time working the mirrors edge where most of the glass is located and where pits tend to grind out last Tool on top tends to lengthen the radius of curvature while mirror on top tends to shorten the radius of curvature

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What grinding tool  ATM Optics and DIY Forum  Cloudy
What grinding tool ATM Optics and DIY Forum Cloudy

Jun 08 2020 · What grinding tool posted in ATM Optics and DIY Forum I plan on ordering supplies to make my first mirror Thinking an 8 f6 From doing a bit of reading and watching the Dobson video it seems that the tool used for rough grinding is another glass blank the tool goes convex while grinding the mirror concave So am I looking at ordering two 8 mirror blanks

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Telescope Mirror Blanks
Telescope Mirror Blanks

page for low prices on plate glass mirror blanks If youd like to buy a complete mirror grinding KIT with all abrasives and grinding tool included please see the Buy Telescope Mirror Kits website for the lowest prices on plate glass telescope mirror grinding kits

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Making a homemade mirror grinding machine  ATM
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

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Telescope Mirror Making
Telescope Mirror Making

For grinding the back of my 12 mirror I used an 8 disk of 34 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 34 particle board glued together I used a chisel and a belt sander to put a curve on the

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

The problem with thin mirrors is that they flex more easily during grinding and polishing making it hard to achieve the required surface precision They also need a more complex mirror cell additional support points Plop is a useful software to let you calculate the number of points needed based on the diameter and thickness of the glass

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Moulding Knives Templates Molding Catalog by Mirror
Moulding Knives Templates Molding Catalog by Mirror

If youre seeing this message that means JavaScript has been disabled on your browser please enable JS to allow this app to work

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MirroroMatic mirror making machine  ATM pages of
MirroroMatic mirror making machine ATM pages of

After reading an article by Ed Jones about using diamond pellets for that task I wanted to try the idea on the grinding machine For that purpose I glued diamond pellets to a plaster tool and used it like a normal grinding tool on the machine The tool should not be bigger than ½ the diameter of the mirror

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GrindingPolishing and Figuring  Part 2  Polishing
GrindingPolishing and Figuring Part 2 Polishing

It can be flat or it can have the radius of your mirror on it The grinding tool is traditionally used by TMs The base must be thick enough not to flex and can be made of thick glass aluminum even plaster has been successful What you choose is up to you I have always used 16 or 18 X 1 thick portholes

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Ed Grinds a Mirror
Ed Grinds a Mirror

The usual way to handle this is to heat the pitch in a small used coffee can and pour it onto your mirror or tool But the Grinding Guy has other ideas and his solution is simple and elegant I wrap my tool with 2 wide masking tape making a small reservoir for the pitch which was crushed to pieces with a hammer

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Newport Glass Works LTD Grinding Polishing and Figuring
Newport Glass Works LTD Grinding Polishing and Figuring

You can use a tool 75 of the mirror diameter without much difficulty Tools smaller than 75 have less tendency to produce a spherical curve during fine grinding Although a 16 tool works well with a 16 mirror for larger mirrors I would recommend a smaller tool simply because full size tools

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Amazon Best Sellers Best Glass Cutting Tools
Amazon Best Sellers Best Glass Cutting Tools

Glass Cutter Tool Mirror Cutting Tool with 26 mm 512 mm 1220 mm Glass Cutter Head and Screwdriver Oil Dropper Glove for Glass Tiles Mirror Cutting 42 out of 5 stars 70 1499

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Woodware Mirror Grinding Stand
Woodware Mirror Grinding Stand

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 place the mirror blank on top

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Newport Glass Works LTD Grinding Polishing and Figuring
Newport Glass Works LTD Grinding Polishing and Figuring

You can use a tool 75 of the mirror diameter without much difficulty Tools smaller than 75 have less tendency to produce a spherical curve during fine grinding Although a 16 tool works well with a 16 mirror for larger mirrors I would recommend a smaller tool simply because full size tools

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Precision mirror grinding and machining of steelbonded
Precision mirror grinding and machining of steelbonded

The use of ELID mirror grinding technology for precision machining of steelbonded cemented carbides makes it easy to obtain lowroughness mirrors I The basic principle of ELID grinding technology Online electrolytic dressing mirror grinding is a new ultraprecision machining technology developed in Japan in the early 1990s

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Ed Grinds a Mirror
Ed Grinds a Mirror

The usual way to handle this is to heat the pitch in a small used coffee can and pour it onto your mirror or tool But the Grinding Guy has other ideas and his solution is simple and elegant I wrap my tool with 2 wide masking tape making a small reservoir for the pitch which was crushed to pieces with a hammer

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Grinding and Polishing a Meniscus Mirror – Astronomy
Grinding and Polishing a Meniscus Mirror – Astronomy

While tools for grinding telescope mirrors is covered extensively elsewhere I will say that the challenge posed by a fast mirror is that the sharp curvature requires your grinding surface to be made of small “bits” whether those bits are tiles coins nuts or whatever In my case I cast the base of my tool from Hydrostone using my

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Moulding Knives Templates Molding Catalog by Mirror
Moulding Knives Templates Molding Catalog by Mirror

If youre seeing this message that means JavaScript has been disabled on your browser please enable JS to allow this app to work

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How to Make Your Own Telescope Mirror  Instructables
How to Make Your Own Telescope Mirror Instructables

This tool is called a pitch lap It is made the same way as the penny tool you made to do the fine grinding except instead of pennies you will use Pitch Fig 6 Here is a photo that shows the tool being pressed against the warmed pitch It is resting on my mirror with aluminum foil between the tool and mirror so it doesnt stick

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telescope mirrors
telescope mirrors

VViViD Telescoping Swivelling Inspection Mirror Tool WTwin White LED Lights 40 out of 5 stars 37 1498 14 98 Get it as soon as Wed Oct 21 FREE Shipping on your first order shipped by Amazon SVBONY 125 inches 90 Degree Zenith Diagonal Mirror for Refractor and Cassegrain Telescopes Astronomical Telescope

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Telescope Making Supplies
Telescope Making Supplies

Throughout the grinding and final lapping stages the objective has been to reduce pits and scratches to the smallest possible size However no amount of grinding can produce a surface smooth enough or sufficiently transparent to meet the needs of a firstclass telescope objective Different techniques are

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AstroTel  Mirror grinding machine
AstroTel 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 Fig3 Page 163 Amateur Telescope Making Book 1 A bowl which rotated was fitted to the spindle

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Study on a 5axis precision and mirror grinding of glass
Study on a 5axis precision and mirror grinding of glass

Oct 01 2016 · Increasing tool posture angle decreases the grain cutting depth to the critical cutting depth from brittle cutting to ductile cutting but it increases the risk of tool interference The mirror freeform grinding may be parameterized by material behavior tool size and posture grinding conditions and abrasive tool performance

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Making A Tile Tool  The ATMs Workshop
Making A Tile Tool The ATMs Workshop

Dec 15 2000 · As all ATMs soon discover there are many different ways to do each of the tasks required for grinding your own mirror Making a grinding tool is no different For smaller mirrors up to about 10 inches diameter using a solid glass tool often works out best especially for the beginner

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Grinding Tools without Epoxy Richard
Grinding Tools without Epoxy Richard

Grinding Tools without Epoxy Richard Schwartz Star Fleet Engineering Hawthorne California rev September 2000 rev September 2001 This article is to explain how to make tile grinding tools and dental stone pitch lap foundations without epoxy and to also explain WHY this is a good way to do it A common problem that beginners experience when making telescope mirrors is the failure of the edge

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Stainless steel  FEIN Power Tools Inc
Stainless steel FEIN Power Tools Inc

Stainless steel From coarse grinding to a mirror finish we offer a wide product portfolio for both large and small applications from compact angle grinders and highfrequency grinders to die grinders handheld and stationary machines rated from 350 to 3700 Watts

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Glass and Mirror Grinding  CR Laurence Co Inc
Glass and Mirror Grinding CR Laurence Co Inc

Grinding Tool Sanders Grinders and Accessories 4 X 106 Upright Machines 4 x 64 Machines 4 x 132 Machines Grinding and Smoothing Mills Scratch Polishing Machine 4 x 106 Seamers Used to Aid in Polishing Glass and Mirror CRL Polishing Oil CRL Tube Wax Lubricant

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Making A Tile Tool  The ATMs Workshop
Making A Tile Tool The ATMs Workshop

Dec 15 2000 · As all ATMs soon discover there are many different ways to do each of the tasks required for grinding your own mirror Making a grinding tool is no different For smaller mirrors up to about 10 inches diameter using a solid glass tool often works out best especially for the beginner

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8 F6 Mirror Grinding  Dr Debug
8 F6 Mirror Grinding Dr Debug

Other tools used for hogging out also can be a metal ring or pipe flange For my grinding tool I used Portland cement This was readily available an cheap For the 8 mirror I made a subdiameter tool The tool size ended up being 625 in diameter This came out

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Mirror grinding machine construction log  James Crombie
Mirror grinding machine construction log James Crombie

Cleaned mirror platter and tool dried mirror and check with low angle light No Pits visible Very uniform surface under 7 power loupe Aug 5 2003 I was off to the Nova East Starparty for the weekend a good turnout but lousy weather We were rained out for 3 days Started on the 12micron grit today

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Fixed post mirror grinder advice  DIY Astronomer
Fixed post mirror grinder advice DIY Astronomer

Nov 01 2011 · Basically there are two types of grindingpolishing machine The ‘traditional’ type which involves the mirror rotating at a relatively slow speed a few rpm for a big mirror 1620 inches with the tool moving across the mirror from side to side at a higher rpm depending on the size of the mirror andor tool

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Mirror Grinding  DIY Astronomer  Stargazers Lounge
Mirror Grinding DIY Astronomer Stargazers Lounge

Hi Everyone I am thinking of restarting mirror grinding at home I used to grind by hand and in this method when we use the 13rd offcentre strokes for hogging out the sagitta the upper glass becomes concave and would be polished into a mirror

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Astronomy Making a Mirror  El Camino College
Astronomy Making a Mirror El Camino College

Mirror and Tool We start with a mirror blank This is a round piece of Pyrex glass with one flat face the bottom and one face slightly shaped but very rough We use a plate glass tool which is identical in diameter to the mirror blank to smooth the glass blank and shape the surface into a paraboloid By adjusting our grinding

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Figuring the Perfect Mirror  al coat
Figuring the Perfect Mirror al coat

The mirror is now on the bottom dont forget to rotate the mirror Since the original version of this program we have learned a bit more about polishing lap on top It seems that lap on top polishing with short strokes actually shortens the mirror radius Grinding tool on top lengthens mirror radius

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Homemade Telescope Making  Google Sites
Homemade Telescope Making Google Sites

The mirror or tool was then carefully placed on top of the tool or mirror and grinding started ie pushing the glass disk on top back and forth The procedure was quite similar to grinding a smaller mirror except that the disks are heavier With the coarser grits pressure was applied to speed grinding At the start of grinding each

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Brittleductile transition in shape adaptive grinding SAG
Brittleductile transition in shape adaptive grinding SAG

Apr 01 2017 · SAG tools were dragged 25 mm across prepolished silicon carbide surfaces with a tool offset linearly increasing between 0 and 03 mm as shown in Fig 10a During these “flymill” tests the tool was not rotated such that individual grinding tracks were associated with individual abrasives

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zambutomirrorgroup  Newbie question polsim
zambutomirrorgroup Newbie question polsim

Apr 25 2020 · My first attempt was in 1970 with a 10 mirror and a 10 glass tool I walked the barrel for many hours The end result was a cracked mirror from the mirror sticking to the tool during fine grinding and driving it loose with a 4 X 4 The crack was around an 1 deep into the pyrex

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Telescope Making  Wikibooks open books for an open world
Telescope Making Wikibooks open books for an open world

Sep 21 2020 · The basic grinding zone is a surface to put the mirror and tool on some towels for cushion and cleanup water and grit If you are working indoors you should have a bucket of water to rinse the mirror and tool in If you are outside you can spray them off with a hose John Dobson likes to work on a board placed over two buckets

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Waite Research  24 F35 Mirror Fabrication
Waite Research 24 F35 Mirror Fabrication

After the tool was hard I used a rotary tool and diamond bit to route shallow grooves between all the tiles This helps disperse the abrasives helps the tool grind faster and avoids suction locks between the tool and mirror The big glass was placed on the turntable of my fixedpost grinding

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