grinding tool mirror

grinding tool mirror

tut44 Making A Mirror Grinding Tool - Asterism.org

2019-3-8 · 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,

Mirror grinding - scope making

2007-2-13 · Tile tools grind faster, and you can make 2 mirrors instead of one. Or you can share the costs of a mirror kit with a friend and make a mirror each. A tile tool is a disc poured from cement, with a layer of hard, porcelain tiles epoxied on it.

Grinding Tool Mirror

The mirror (or tool) was then carefully placed on top of the tool (or mirror) and grinding started (i.e., 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. Waite Research :: Quartz Mirror 18" F3.6.

Joy of Mirror Making: Rough Grinding - BBAstroDesigns

31 行 · 2020-5-19 · Grinding the curve into the mirror face can be done by one of the following

Mirror Grinding Machine

2015-8-14 · 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.

grinding tool mirror - leverdoyon.fr

2020-5-2 · Mirror grinding - scope making. Again, rotate randomly, both tool and mirror. As soon as the curve has reached the edge, and your saggita is equal or slightly deeper (depending on method you use later) you can go on with the fine grinding.

mirror grinding tool - ankersmid-lab.be

Mirror Grinding Tool for a 22" f/4.0 Telescope Mirror ... Feb 11, 2014 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

Joy of Mirror Making: Polishing - BBAstroDesigns

2021-7-20 · 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. Materials Needed.

Lens & Mirror Making Best lenses and mirrors are both

2008-3-12 · Grinding Motion • Move mirror back and forth over tool & grinding compound • After number of strokes rotate mirror, tool in opposite direction • Change position of stroke alternatively • Eventually move fully around the mirror • Grit removes material from both • But tool edges wear down, while mirror center carved out

Explore how telescope mirrors are made | Astronomy

2021-7-27 · 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 paired with a device called a grinding tool, usually ...

grinding tool mirror - leverdoyon.fr

2020-5-2 · Mirror grinding - scope making. Again, rotate randomly, both tool and mirror. As soon as the curve has reached the edge, and your saggita is equal or slightly deeper (depending on method you use later) you can go on with the fine grinding.

Mirror grinding tile tool - ATM, Optics and DIY Forum ...

2012-7-8 · Mirror grinding tile tool - posted in ATM, Optics and DIY Forum: Hi all, Im about to begin crafting a mirror grinding tool out of plaster and tile. In researching how to make the tool, Ive ran across some conflicting instructions. Would I create the tool flat or make it convex in accordance to the final shape of my mirror

Stellafane ATM: Mirror Making Overview

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).

8" F6 Mirror Grinding - Dr. Debug

2009-10-17 · 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 sub-diameter tool. The tool size ended up being 6.25" in diameter. This came out to be 78% the size of the glass I was going to grind.

GRINDING A TELESCOPE REFLECTOR WITH TOOL

GRINDING A TELESCOPE REFLECTOR WITH TOOL-GRINDING DEVICE By George F. Tauchmann Grinding telescope reflectors of 15-inch diameter and over makes it necessary to employ a motor-driven turntable. Small mirrors are generally ground and polished by rotating the tool, fastened to the turntable, and working the mirror blank by hand

Joy of Mirror Making: Introduction - BBAstroDesigns

2021-2-3 · Mirror on top (called MOT) can also be used to avoid astigmatism, since the tool supports the mirror, but the grit seems to fall down between the tiles requiring more grit and wets to complete. 6 inch [15cm] tiled tool. Rough Grinding. Unless the mirror comes pre-generated, the initial curve will have to be ground into the mirror.

Large Thin Mirror Making - BBAstroDesigns

2012-7-3 · I like to use tools that are 75% the mirror size. The tool is lighter and easier to handle, and still grinds fast enough. Plaster tools over 20" in size are heavy and awkward to handle. Make a grinding tool from finishing plaster, hydraulic cement, casting plaster, or concrete, available at

Lens & Mirror Making Best lenses and mirrors are both

2008-3-12 · Grinding Motion • Move mirror back and forth over tool & grinding compound • After number of strokes rotate mirror, tool in opposite direction • Change position of stroke alternatively • Eventually move fully around the mirror • Grit removes material from both • But tool edges wear down, while mirror center carved out

Mirrors - using undersize tool - ATM, Optics and DIY

2014-9-21 · Careful when first grinding with new layers of tiles. Some may be higher than others and after stroking past the edge of the mirror and then back might snag the edge. Step 1. Use short COC strokes that don't take the edge of the tool past the edge of the mirror

Stellafane ATM: Guide to Strokes

With mirror on top, overhang mirror about 40% of its diameter over the tool, so that most of the grinding action is concentrated on the center of the mirror and the edge of the tool. Take straight strokes such that the center of the mirror travels along an imaginary chord 1 on the tool

grinding tool mirror - fotografienellekebreems.nl

mirror grinding tool . Mirror Grinding Machine, G W Ritchey , It embodies the "sub-diameter tool" design approach to making large telescope mirrors whereby the grinding tool is drawn across the mirror blank by programmable rotating arms It was donated to NASM by the Lick Observatory in 1993 and shipped in March of that year.

grinding tool mirror - ascnabytek.cz

For large thin mirrors, say 12 inches [30cm] or greater and 1.5 inches [4cm] or thinner, the mirror back must be ground flat, or at least regular in shape before beginning fine grinding the mirror's face. Cast a tool specifically for the mirror's back, and grind with 220 grit, inspecting for low unground spots. Grind

Mirror Grinding Machine

2015-8-14 · 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.

Mirror grinding tile tool - ATM, Optics and DIY Forum ...

2012-7-8 · Mirror grinding tile tool - posted in ATM, Optics and DIY Forum: Hi all, Im about to begin crafting a mirror grinding tool out of plaster and tile. In researching how to make the tool, Ive ran across some conflicting instructions. Would I create the tool flat or make it convex in accordance to the final shape of my mirror

grinding tool mirror - tcgk-tilburg.nl

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

Joy of Mirror Making: Fine Grinding - BBAstroDesigns

2017-4-4 · Grinding also proceeds quicker because the tool spends more time working the mirror's 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

Large Thin Mirror Making - BBAstroDesigns

2012-7-3 · I like to use tools that are 75% the mirror size. The tool is lighter and easier to handle, and still grinds fast enough. Plaster tools over 20" in size are heavy and awkward to handle. Make a grinding tool from finishing plaster, hydraulic cement, casting plaster, or concrete, available at

Mirrors - using undersize tool - ATM, Optics and DIY

2014-9-21 · Careful when first grinding with new layers of tiles. Some may be higher than others and after stroking past the edge of the mirror and then back might snag the edge. Step 1. Use short COC strokes that don't take the edge of the tool past the edge of the mirror

Lens & Mirror Making Best lenses and mirrors are both

2008-3-12 · Grinding Motion • Move mirror back and forth over tool & grinding compound • After number of strokes rotate mirror, tool in opposite direction • Change position of stroke alternatively • Eventually move fully around the mirror • Grit removes material from both • But tool edges wear down, while mirror center carved out

Stellafane ATM: Guide to Strokes

With mirror on top, overhang mirror about 40% of its diameter over the tool, so that most of the grinding action is concentrated on the center of the mirror and the edge of the tool. Take straight strokes such that the center of the mirror travels along an imaginary chord 1 on the tool