Save money and time by purchasing a telpe mirror kit. This kit includes a 6 inch telpe mirror blank, all the silicon carbide grits, white aluminum oxide powders, gugolz pitch, and cerium oxide polish you will need to grind and polish a 6 inch telpe mirror all bundled in one spot. This will get you on a great start to building your own telpe.

The 1.3m telpe mirror blank has been completed by Peter Wangsness and is now at JP Astrocraft in Charleston, … 1.3-m Mirror Grinding Machine … Mirror-O-Matic – Dr. Debug Grinding your own telpe mirror seemed like a cool idea until I did more research and discovered all the physical …

Mirror grinding - scope making. You might purchase a mirror grinding kit, and have everything you need included. If such a kit is unavailable, you need to do some scrounging. You can order a 19 mm thick disc at your local glass shop. Such glass is usually used for tabletops mirror grinding purchase - ikona-coffee.cz,Mirror grinding - scope making.

Gordon Waite shows some steps during fine grinding of the 20" mirror. As the grind progresses through the grades of abrasives, see the technique Gordon uses...

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

Too sharp of mirror edge, resulting in glass flakes breaking off and getting caught between tool and mirror. Tool warping. Scratches are hard to come by with 220 silicon carbide grit; they are very easy with the finer 9 micron aluminum oxide. Fine grinding is done with tool on top (TOT).

The mirror ended up with a very smooth, zone free, nearly spherical figure ready for final figuring. Figure 1: Polishing pads applied to a 9 inch grinding tool. Another local ATM has also tried the polishing pads with abrasive and CeO. His own 17.5" mirror took about nine hours to polish out completely.

All our Mirror Kits contain a Pilkington Float Glass mirror blank and Grinding Tool. These arefinished with fine ground edges. 180 grade first stage ginding powder. 400 grade ginding powder. 303 grade smoothing powder. Top quality Cerium Oxide Polishing powder.

Roughness in stroke numbers, tool rotation, and disc rotation are all important factors in good mirror grinding. Making a tile tool out of tiles that have been broken with a hammer can help to increase the unpredictability of the game:) Always work with water on your hands! ... For removing grit from a telpe mirror, the most safest method ...

clockwise, and the tool 30 degrees counterclockwise. Make 7 more strokes, rotate the mirror 60 degrees clockwise, and the tool 20 degrees clockwise. Don't think in degrees, nor numbers, just spin it randomly. Rough grit breaks up quite fast,

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.

12 inch f4.9 Telpe Mirror Part 3. 16:50. The 12 mirror is taken through the rest of fine grinding, going through 12-micron, 9-micron and 5-micron stages. Gordon shows how to do maintenance on the ceramic tile/dental plaster grinding tool. He demonstrates methods for deepening the mirror faster.

Introduction. Grit is a generic name for the abrasive particles used with a hard tool in rough and fine grinding. Polish (or Polishing Compound) is a generic name for the abrasive used with a soft Pitch tool in polishing and figuring. Grit and Polish differ mainly in particle size and the type of tool they are used with.

Grinding an 8″ F/10 Telpe Mirror. For this project (my first time ever grinding a mirror) I ordered an 8″ Black Vitrified Ceramic (BVC) blank without a pregenerated curve from ASM Products in Ste-Basile PQ. Ordering from Canada is always cheaper once you factor in all the taxes – all told the kit cost about $185.

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, " Making A Mirror Polishing And Figuring Tool ".

Telpe Mirror Kits Firsthand Discovery. Start with one of our telpe mirror kits Each kit comes with a telpe mirror blank and all the abrasives (silicon carbide grits and white aluminum oxide powders), cerium oxide polish and pitch to grind and polish it to your specifications Please note that our kits do not include a grinding tool or pitch lap If you need …

Grinding the secondary is just like grinding any other optic except in minature. I ground the secondary with the workstand and worked the tool on top just like I would grind a larger mirror. This optic is small enough that a lens grinding machine could work well.

My Mirror Grinding Machine. For a long time I've wanted to build a machine for grinding telpe 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. …

Still grinding your own mirror is a key skill that makes you a real telpe maker. To grind a telpe 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 …

When the wet comes to the end, stop grinding, separate the mirror and the tool, and more water and grit, then continue. If you have a tile tool, you can slop some water and grit on from the side without separating the mirror and tool, but don't drag the tool off on the edge of the mirror - this can roll off the edge.

After hogging the mirror blank to depth, the rough grinding stage begins. In this video I am grinding with 60/90 grit. The wets are lasting about 90 second...

Grinding and Polishing a Meniscus Mirror. In many respects, the grinding and polishing stages of fabricating a thin meniscus telpe mirror are not different from any telpe mirror. There are lots of resources, online and in print, describing that. This article will focus on the specific issues introduced by working on such a mirror.

You can use #60 carborundum tools for grinding. Note that you should always maintain an angle on the edge of the mirror throughout grinding. In case your mirror is too light to sand enough, as is done for small size mirrors. Begin grinding concentrating by focusing the center of the mirror to the edge of the tool. However, when having a mirror ...

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 …

Here is a 25 inch mirror on top of the fine grinding tool with pads applied. And here is the result after 5 hrs of machine polishing starting from a 20 micron aluminum oxide grind. Note that the edge is not as reflective.

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. ... Grinding and Polishing. ... Here you see an image of a telpe mirror seen through the Foucault knife edge tester. The green and dark shadows reveal the slope of the mirror at ...

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Gordon Waite describes the mirror grinding tool that he used to grind a pair of 22" f/4.0 mirrors for the Binoscope project. The tool is made from dental pl...

(4) we removed the tile tool from the mold and ground the topside (non-tiled side) by sliding it (topside down) on the sidewalk outside the community center. The result is a grinding tool of the same diameter as the mirror: the tiled side has the same curve as the mirror, and the topside is more or less flat. Now to 80 grit …