Mirror grinding - scope making
One as the mirror, and the other as the tool. If you have such a kit, save the second glass, and make a tile tool. 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.Mirror Grinding Machine,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. Most of themMaking a Tile Tool for Mirror Grinding (in 150 seconds,,Apr 15, 2018· The condensed process of making a tile tool that will be used to grind my 8.5 inch telescope mirror. Making a mould around the Pyrex disc, mixing and pouring...Joy of Mirror Making: Rough Grinding - BBAstroDesigns,31 行· Grinding the curve into the mirror face can be done by one of the following approaches:tut44 Making A Mirror Grinding Tool - Asterism.org,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, amateurMirror 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 is made from dental pl...
Mirror grinding tile tool - ATM, Optics and DIY Forum,
Jul 08, 2012· 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)?Dick Parker's Telescope Mirror Workshop: Cassegrain,,Grinding the secondary is just like grinding any other optic except in minature. I ground the secondary with the mirror on a 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.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 first-class telescope objective. Different techniques areFast Mirror Grinding & Polishing - The ATMs Workshop,Nov 15, 2001· For this mirror, I skipped the pre-polish step and simply used pads and CeO for initial polish. I used five pads on the 9" grinding tool during the polishing phase. A photograph of the tool appears in Figure 1 at left. (This tool was made in my usual manner using tiles attached with paraffin wax.) It took about an hour and a half of polishing,Mirror Grinding Machine,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. Most of themHow to do mirror finish grinding by a grinder,Mar 08, 2021· Mirror grinding is a grinding that the surface roughness of the workpiece is Ra< 0.01μm, and the light is like a mirror after grinding, so it can be clearly photographed. The flatness of the grinding surface is not greater than 3μm /1000mm. The surface machining of high precision and high added value parts requires mirror grinding. 2. Grinder,
Mirror grinding tile tool - ATM, Optics and DIY Forum,
Jul 08, 2012· 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)?Fast Mirror Grinding & Polishing - The ATMs Workshop,Nov 15, 2001· For this mirror, I skipped the pre-polish step and simply used pads and CeO for initial polish. I used five pads on the 9" grinding tool during the polishing phase. A photograph of the tool appears in Figure 1 at left. (This tool was made in my usual manner using tiles attached with paraffin wax.) It took about an hour and a half of polishing,Mirror-o-Matic 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.Stellafane ATM: Materials & Tools,The Tools: Grinding & Polishing. You will need two tools: A hard tool for rough and fine grinding, and a soft tool, or pitch lap, for polishing and figuring. Traditionally, the pitch lap was made on top of the grinding tool. We recommend using plaster disks for tool substrates, and that you use separate disks for these two tools.Grinding and Polishing a Meniscus Mirror – Astronomy,,Oct 17, 2017· 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.Dick Parker's Telescope Mirror Workshop: Cassegrain,,Grinding the secondary is just like grinding any other optic except in minature. I ground the secondary with the mirror on a 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.
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 first-class telescope objective. Different techniques areBuild your own telescope part 1: The mirror – Thomas,,The grinding and polishing tools are the same size as the piece of glass. When you rub the glass over the edge of the tool, it grinds the center of the glass, hence making it concave. Over time, the peaks and valleys get all shaved by the polishing process and you end up with the right shape.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.Mirror grinding machine construction log - jamescrombie,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.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.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
How to do mirror finish grinding by a grinder
Mar 08, 2021· Mirror grinding is a grinding that the surface roughness of the workpiece is Ra< 0.01μm, and the light is like a mirror after grinding, so it can be clearly photographed. The flatness of the grinding surface is not greater than 3μm /1000mm. The surface machining of high precision and high added value parts requires mirror grinding. 2. Grinder,Mirror-o-Matic 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.Fast Mirror Grinding & Polishing - The ATMs Workshop,Nov 15, 2001· For this mirror, I skipped the pre-polish step and simply used pads and CeO for initial polish. I used five pads on the 9" grinding tool during the polishing phase. A photograph of the tool appears in Figure 1 at left. (This tool was made in my usual manner using tiles attached with paraffin wax.) It took about an hour and a half of polishing,Making a Dental Stone Tool Method of grinding of a mirror.,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 until the tool is off of the mirror and the back is cleaned up so that the tool will sit flat on the table top.Mirror-o-Matic,Machine grinding and polishing is almost always done with the mirror on the bottom (MOB) and the tool on top (TOT). The tool can be another piece of glass, a tile tool or a metal tool. The tool is always smaller than the mirror if a concave mirror is desired. Tools of 50% to 80% of the mirror…Mirror grinding machine construction log - jamescrombie,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.
Grinding and Polishing a Meniscus Mirror – Astronomy,
Oct 17, 2017· 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.Dick Parker's Telescope Mirror Workshop: Cassegrain,,Grinding the secondary is just like grinding any other optic except in minature. I ground the secondary with the mirror on a 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.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 first-class telescope objective. Different techniques areTelescope Mirror Blanks / TelescopeMirrorBlanks.Com,,page for low prices on plate glass mirror blanks. If you'd 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.Glass and Mirror Grinding - C.R. Laurence,C. R. Laurence is the world leader, wholesale distributor to the Glazing, Industrial, Construction, Architectural, Hardware and Automotive Industries, supplying railing, windscreen, standoffs, and other supplies to major industries and manufacturers.Ed Grinds a Mirror - scopereviews,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.,
Optical Testing of Parabolic Mirrors : 9 Steps (with,
Tools: Table Saw with dado blade, wood chisel screwdriver Materials: (Note: all of my dimensions are in US units. Metric equivalents are perfectly fine.) For Mirror Mount: 3 foot by 1.5 foot plywood, 3/4 inch thick 2 foot by 1.5 foot plywood, 3/4 inch thick 2 6 inch angle brackets 1 L hook 12 screws 3/4 inch long for the L brackets 3 flat head wood screws for 'feet' For Optical Tester: 6 inch,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.,,,,
