GME +GLOBAL MINING MACHINE

inch plate glass fine grinding

Telescope Mirror Making

10 Feb 2015 ... Begin grinding one glass disk against the other with the mirror on top. ... the nylon window screen piece (12X12 inches is fine) over the lap.

Section 3: Mirror making - STAR Astronomy

The telescopes that I've observed with most have plate glass mirrors .... is made by wrapping a metal or cardboard dam around the mirror a couple of inches high. .... If you rough ground your mirror with 60 grit, you should start fine grinding with...

Casting a Large, Light-Weight Telescope Mirror from Recycled Glass

All temperatures are in degrees Fahrenheit, and all dimensions are in inches. ... First I'll lay a bit of ground work on fine grinding, polishing, and lap pressing. .... WARNING: if your mirror is plate glass, this may cause the glass to crack if you...

3 Ways to Smooth Glass Edges - wikiHow

Fine grinding a telescope mirror. ... gentler sliding of aluminum oxide particles in the shape of plates between the glass and tool. ... 1 1/2 inches tall is fine for mirrors up to 12 inches in size; beyond that make a 2 inch thick tool (large tools that...

Dokas Photos – How To Ground Your Own Glass

I've collected many fine books on telescope making and mirror grinding, ... We stuck them all over the faces of our plate glass tools and proceeded to polish ... of squares about 1/4 inch thich and 11/2 inches wide distributed over the glass tool.

Grinding/Polishing and figuring a 14" f/3.85 Telescope Mirror - Raheny pdf

Week two brought a 10-inch diameter, two-inch thick round piece of glass. That would be my mirror. ... Next week was fine grinding. Several sessions, with...

John Pierce's Telescope Making Articles. - Bob May's Astronomy Site.

Blanks for the flats and tools are to be of polished plate glass. ... probably accurate to within .001 inch, and we can easily grind it much worse than this. ..... it from water in grinding and polishing; fine grind on a piece of plate glass and polish by...

The Practice of Tempera Painting - Pigments and Brushes - Notebook

I ordered a 14" x 31.5mm (thick) mirror blank and a kit containing all ... Safety note: Grinding glass dry WILL fill the air you breath with fine glass particles which can result in a ... You don't need to cover every square inch with tiles. Arrange the...

Stained Glass For Dummies Cheat Sheet - For Dummies

To do this we have bought 1/4" or 3/8" thick glass discs from a local glass shop ..... the finer stages of fine-grinding if you want to be within a fraction of an inch of...

El Camino College - Astronomy: Making a Mirror

Our bits fit all American and German made glass grinders and some Chinese models as well. ... Because we plate our own diamond products we can offer the absolute best drums at better ... and the task at hand, use our handy Bit Reference Chart and Bit Grit Chart · 1 Inch ... WB-18F Fine Grit LampBit (for 9º & 18º mitre)

Stellafane ATM: Fine Grinding

Information about grinding and related work done to cold glass to shape it. ... Carving may be done with a heavy fine blast, thin diamond wheels or other effective means of ... Cut Glass (note difference from Cutting Glass): normally involves thick glass and ... The bowl was drilled upright, adding about an inch of water and a...

Mirror making:

The idea is to use an abrasive that is so fine that it leaves no scratches; that means the softest ... YOU MAY BE ABLE TO SLIGHTLY POLISH THE PLATE GLASS BUT THE TEMPERED GLASS .... Backing pad - 2, 3 or 5 inch depending on the job in hand; 3. .... You will need to grind out the scratch with progressively finer grit.

How I make Telescope Mirror Blanks - Michael Davis Publishing

The first photo below shows a 12.5 inch diameter, 1.5 inch thick, telescope mirror ... That would leave 1/2 inch of glass on the top face of the mirror for grinding in...

Telescope Making - Wikibooks, open books for an open world

3.1.1 Glass Objects; 3.1.2 Avoid Tempered Glass; 3.1.3 The Scavenger's Sagitta ... the Soft Lap; 3.5.6 The Paper Lap; 3.5.7 Final Fine Grind; 3.5.8 The Polish ..... So! let's figure out a Sagitta for an eight inch mirror with a focal length of forty...

Aanraku Shopping Cart: Grinder bits - Aanraku Glass Studios

Glass grinder: This must-have power tool has a diamond wheel that allows you ... 7/32-inch copper foil: To wrap each piece of glass in your project, you use thin...

Jumping into Mirror Making, by Michael Mills

29 Sep 2014 ... This is a video on how I Successfully notched tempered glass with a ... then fine grit to smooth out the rough grind and also to chamfer the sharp...

Lapping - Wikipedia, the free encyclopedia

Construction of a 12 inch Schmidt-Cassegrain, Sky and Telescope, November 1976, pg 382. ... With some fine grit grind the pan rim against the plate glass.

How to Grind and Polish a Lens - Newport Glass

The story is I bought some sheet glass at auction a few years ago; 33 inches ..... And that ended my fine grinding of this mirror - we'll put pads on next ATM...

Grinding, polishing and correcting an eight-inch lens - ADS

Aanraku® TWOFERS - 1-inch 220 grit fine glass grinding bits (2 bits per package). Aanraku® TWOFERS - 1-inch 220 grit fine glass grinding bits (2 bits per...

Figuring with a full-size lap - Lockwood Custom Optics

To grind the blank, you will need a small ¼" thick sheet of glass to use as the grinding tool. ... This is accomplished by running fine emery cloth across the outer edges. ... You want to move your hand in a circular motion making about two inch...

Mirror grinding - Scopemaking.net

The first type of lapping (traditionally called grinding), involves rubbing a ... a surface such as iron or glass itself (also known as the "lap" or grinding tool) with an ... of the orientation of the specimen to the lapping plate and fine adjustment of the ... in Helium Light Bands, one HLB measuring about 0.000011 inches (280 nm).

How to grind Tempered Glass Successfully! - YouTube

By now, your mirror will have taken on a fine spherical shape. Next, you use ... it around. After about five minutes, you should have a 1/8 to 3/16 inch bevel. ..... Pyrex is harder than plate glass, thus is more difficult to grind and requires more grit.

Fixing scratched glass: jeweler's rouge vs. cerium oxide - Finishing

Fine as the powders seem to be, most of them are not fine enough to paint ... Grinding one's own colors has a romantic sound; but I do not set any particular store by it. ... 89] want a piece of ground plate glass about eighteen inches square.

San Francisco Sidewalk Astronomers - "You Silly Goose!" Building a ...

Here is a stack of four 8 in diameter disks I cut out of 5/16 inch thick glass. ... Soda lime plate glass will work fine for an amateur telescope once it reaches thermal .... I can use one blank as the mirror and another as the grinding tool, and have a...

Tool Sharpening Supplies - Peachtree Woodworking Supply, Inc.

Accommodations; Grinding with our supplied glass? ... Successful mirror makers will leave the Seminar with a fine-figured mirror ... If your glass does not already have the proper curve for the final focal length a six inch mirror will take about half ... The disadvantage at making a plate glass mirror at the workshop is waiting a...

Coldworking including drilling & cutting glass

The unique abrasive plate drive system is vibration free for greater control of the ... This serves as a bearing for an abrasive coated glass grinding plate, which is...

Home - Fort Worth Astronomical Society

Before Your Start; Fine Grinding; When to Switch Grits; Scratches: Prevention & Cures ... With any glass grinding operation, you must work wet, to prevent glass dust ... overhang on each edge -- one inch for a 6" mirror, 1.3 inches for an 8" mirror. .... Your sample plates will have only pits of the given grit size, and you can use...

Herb's Glass & an 8-inch mirror - Retrotechnology.com

The finishing of a fine doublet lens is nothing more complicated than ... You will have noted also molded plate glass tools have been furnished ... The dial indicator should be positioned over one of the 3 3/8 inch balls to prevent tilt of the lens.

mirror making

The grinding- tool of 6 inch diameter was made from 10mm plate glass which was ... time after I had finished fine grinding with grid size 400, I was quite shocked.

Large Thin Mirror Making Why grind a large thin mirror?

27 Mar 2015 ... We use a plate glass "tool" which is identical in diameter to the mirror blank to smooth the ... The four stages are rough grinding, fine grinding, smoothing, and polishing. ... Polishing an 8 inch mirror takes about 5 hours total.

Don Surles Mirror Making Workshop #16 "Glass pushin' fever."

telescope making, mirror grinding, homemade tripod, eyepieces, astronomy. ... Pyrex® mirror blank, but in my opinion, annealed plate glass is better for this first, "learn ... Make it the same size as the mirror in diameter, 50 mm thickness is fine.

14" utrathin mirror - Stathis-Firstlight

If you want to smooth the edges to salvage a glass bottle, object or sheet, you ... A multi-pack has coarse to fine grit cloths, which will aid in smoothing the edges. ... Work for about 10 to 20 seconds on each inch, and then move along the rest of...

Diamond Grinder Bits - - Inland Craft Products

Finished to a tolerance of +/- 0.0005 inch flatness Fine 1000 grit (11 micron). .... This jig will allow you to locate all sharpening positions with your bench grinder. ..... Use the Coarse Glass Plate Sharpening System to remove nicks and gouges...