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tut44 Making A Mirror Grinding Tool - Asterism

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, amateur astronomers have been building their own telescopes.

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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,

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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.

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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 (an 8 f/8 parabola)?

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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

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Woodware: Mirror Grinding Stand

2020-5-21  Mirror Grinding Stand (above) The front view and top views show the Mirror Grinding Stand with its wide base (big enough to walk around on), pedestal, and small top. The top is only a little bigger than the largest mirror you wish to grind. The mirror tool is held to the table with three screwed down blocks and six small wedges.

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Fast Mirror Grinding Polishing - The ATMs Workshop

2001-11-15  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

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mirror grinding kit grind and polish telescope mirror at ...

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

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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).

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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.

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SkyBadger - Mirror Grinding Machine

The clamps hold the mirror centrally on the grinding platter, Freeing one should allow the mirror to be removed, cleaned and reset with out disturbing the centering. The tool for grinding was made from cutting a disk to the same size as the mirror from 3/4" plywood and using duck tape to create a dam around it.

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Fast Mirror Grinding Polishing - The ATMs Workshop

2001-11-15  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

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Woodware: Mirror Grinding Stand

2020-5-21  Mirror Grinding Stand (above) The front view and top views show the Mirror Grinding Stand with its wide base (big enough to walk around on), pedestal, and small top. The top is only a little bigger than the largest mirror you wish to grind. The mirror tool is held to the table with three screwed down blocks and six small wedges.

More

mirror grinding kit grind and polish telescope mirror at ...

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

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

2016-10-1  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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Newport Glass Works, LTD. Grinding, Polishing and

2014-7-21  A solid tool traps abrasive in the center of the mirror and resists grinding the mirror spherical. When you first start a new and smaller abrasive, this shows up as a tendency to form a large bubble in the center, especially in the larger abrasives.

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Basics of Mirror Grinding - Brown University

2009-2-2  Basics of Mirror Grinding. Glass mirrors are typically ground from a blank, or cylindrical piece of glass, using the abrasion created by moving the mirror across a second glass blank (the tool) which is covered with silicon carbide or aluminum oxide grits. The initial rough grinding process uses grit sizes of 60, 120, and 180 to carve out the ...

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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 well equipped building supply houses.

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

Just put the tool on the bottom and the mirror on top, then grind until the sagitta decreases. As you do this, sometimes the mirror and tool won't fit together perfectly and there will be bubbles in there - that's okay at this step, as you work through fine grinding though, seeing these can be a sign of a problem.

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spin grinding a slumped mirror - ATM, Optics and DIY

2017-11-18  spin grinding a slumped mirror - posted in ATM, Optics and DIY Forum: so after taking a few years off from the hobby to get my wife well i have completed my spin grinder and am ready to tackle the 14 honeycombed mirror that you see as my avatar i had it fused to shape many years ago and it is slumped to an F5 curve. i have not used a spin grinder as yet all my

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Fast Mirror Grinding Polishing - The ATMs Workshop

2001-11-15  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

More

Woodware: Mirror Grinding Stand

2020-5-21  Mirror Grinding Stand (above) The front view and top views show the Mirror Grinding Stand with its wide base (big enough to walk around on), pedestal, and small top. The top is only a little bigger than the largest mirror you wish to grind. The mirror tool is held to the table with three screwed down blocks and six small wedges.

More

Making a Dental Stone Tool Method of grinding of a mirror.

2013-4-26  The tool, being a copy of the glass, is also not spherical and thus needs some grinding, along with the mirror, to gain the spherical state. Typically I make a tool in about 30-40 minutes from the time that everything is pulled out

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Newport Glass Works, LTD. Grinding, Polishing and

2014-7-21  A solid tool traps abrasive in the center of the mirror and resists grinding the mirror spherical. When you first start a new and smaller abrasive, this shows up as a tendency to form a large bubble in the center, especially in the larger abrasives.

More

mirror grinding kit grind and polish telescope mirror at ...

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

More

Basics of Mirror Grinding - Brown University

2009-2-2  Basics of Mirror Grinding. Glass mirrors are typically ground from a blank, or cylindrical piece of glass, using the abrasion created by moving the mirror across a second glass blank (the tool) which is covered with silicon carbide or aluminum oxide grits. The initial rough grinding process uses grit sizes of 60, 120, and 180 to carve out the ...

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Ultrasonically assisted grinding for mirror surface ...

Application of diamond electroplated tool (DET) to ultrasonic vibration assisted grinding (UVAG) of steel surface for mirror finish has been introduced, but the effect of DET working surface ...

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Re: ATM mirror grinding mechanics marshmello test

2006-5-30  During grinding, the mirror is slid over the tool (really, over the grit between the mirror and the tool), and my physics book says: "whenever the surface of one body slides over the other, each body exerts a frictional force on the other, parallel to the surfaces." So, the friction is in fact not between the mirror's and the tool's surfaces ...

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Making a Mirror. - Astronomy

2002-12-16  Grinding/polishing machines work by rotating the bottom piece (mirror or tool) and letting the top piece freely rotate about it's central axis as it desires to do. As you watch a machine work, the upper piece will rotate at about 1/2 to 1/10 the speed of the bottom piece.

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Telescope Mirrors, Blanks, Secondaries, Grinding Materials ...

2015-12-17  TELESCOPE MIRRORS, BLANKS, TOOLS, TESTERS, GRINDING MATERIALS, POLISHING MATERIALS, ALUMINISING, MIRROR BOX, RONCHI, LASER, FOUCAULT, ... per kilo $40AUD Tin oxide grinding powder per kilo $30AUD Pumice grinding powder per kilo $30AUD 80 Grade grinding powder per 8" mirror $2AUD 120 " " $2AUD 220 " " $3AUD 320 " " $4AUD

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