Mirror Grinding Telescopemirror Grinding Tool

Mirror Grinding Telescopemirror Grinding Tool

  • Mirror grinding - scope making

    Draw a grid on the mirror surface with a permanent marker (<--picture) Add the usual half teaspoon of grit, sprinkle with water and grind for a couple of minutes, rotating tool and mirror often. Rinse the mirror and inspect the grid lines. If the grid is worn out evenly, you are doing fine.

  • 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 Oxide Polishing powder.

  • Joy of Mirror Making: Rough Grinding - BBAstroDesigns

    31 rows  The curve is ground into the mirror face using a grinding tool. The curve is pre-generated

  • MIRROR DIAMETER2.533.540.1000.0830.07260.1500.1250.10780.2010.1670.143100.2510.2090.179See all 31 rows on bbastrodesigns
  • tut44 Making A Mirror Grinding Tool - Asterism.org

    Good grinding technique will produce a spherical shape, therefore the only important property needing measurement is the depth of the concave surface at the center of the mirror. The easiest way to do this is by placing a stiff metallic straight edge across the mirror face center spanning edge to edge.

  • File Size: 387KB
  • Telescope Mirror Making: Part 3, Rough Grinding - YouTube

    2012-09-23  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 seconds ...

  • Author: AZ Mike
  • Rough Grinding of a Telescope Mirror Guy's Math Astro Blog

    2014-12-15  We use both hands to make the mirror travel in a circular path in either direction for about 6 turns, grinding the center of the mirror mostly against the edge of the tool. (This needs to be demonstrated!) Wide strokes are good, but the center of the mirror must not get too close to the edge of the tool.

  • Stellafane ATM Main Page

    IntroductionGeneral InformationOptical TestingATM Resources ReferencesA lot has changed since Russell Porter wrote those words - today the "average workman" can afford to buy an already made telescope and Dobsonian mountings are very popular. Much is also unchanged - mirror grinding techniques are very similar to those written up by Porter and Ingalls in the 20´s and 30´s. Many amateur astronomers still choose to fabricate their own instruments, for the pride of accomplishment, the gaining of knowledSee more on stellafane.org
  • Mirror Grinding Machine

    The overarm drive pin is attached to the tool with a 3/8" swivel foot and pitch. The eccentric arm is attached to the overarm with the same kind of swivel foot (McMaster Carr). It rests in a 1-1/4" hole on the overarm that is bored about halfway through.

  • Telescope Mirror Blanks / TelescopeMirrorBlanks.Com ...

    There are several advantages to using thin plate Limestone mirror blanks for grinding your telescope mirror: * Thin mirror blanks are less expensive, allowing more people to afford the hobby of grinding their own telescope mirror. * Choosing a thin mirror blank gets you more aperture for your dollar. * Telescope mirrors made from thin mirror blanks take less time to thermally equalize with the ...

  • Telescope Making Supplies

    Because of its extreme hardness, silicon carbide is ideal for grinding Pyrex, which is harder than ordinary Limestone, or very deep curve generation used for refractor, Maksutov, or richest field objectives. The very coarse sizes (40 and 60) are used for diameters larger than six inches or deep curves where a large amount of Limestone must be removed.

  • tut44 Making A Mirror Grinding Tool - Asterism.org

    Good grinding technique will produce a spherical shape, therefore the only important property needing measurement is the depth of the concave surface at the center of the mirror. The easiest way to do this is by placing a stiff metallic straight edge across the mirror face center spanning edge to edge.

  • Mirror Grinding - Take A Class Or DIY? - ATM, Optics and ...

    2017-05-11  Page 1 of 3 - Mirror Grinding - Take A Class Or DIY? - posted in ATM, Optics and DIY Forum: Ive been interested in grinding/polishing my own Newt mirror for a long time but dont know how to get started. As a beginner, would you recommend attending a workshop or class or is it possible to make a good mirror using other learning resources such as books and online videos?

  • Rough Grinding of a Telescope Mirror Guy's Math Astro Blog

    2014-12-15  We use both hands to make the mirror travel in a circular path in either direction for about 6 turns, grinding the center of the mirror mostly against the edge of the tool. (This needs to be demonstrated!) Wide strokes are good, but the center of the mirror must not

  • Telescope Mirror Blanks / TelescopeMirrorBlanks.Com ...

    There are several advantages to using thin plate Limestone mirror blanks for grinding your telescope mirror: * Thin mirror blanks are less expensive, allowing more people to afford the hobby of grinding their own telescope mirror. * Choosing a thin mirror blank gets you more aperture for your dollar. * Telescope mirrors made from thin mirror blanks take less time to thermally equalize with the ...

  • Mirror Grinding Telescopes and Stuff

    The telescope mirror is made from a Limestone black, which is a spherical piece of Limestone, flat on both sides. One surface of the Limestone is shaped into paraboloid, while the other side is unused. The preferred Limestone for telescope mirrors is Pyrex because of its low thermal expansion characteristic. To shape the flat surface into a paraboloid, it is ground using grit and a tool. The tool is a ...

  • Grinding and Polishing a Meniscus Mirror – Astronomy ...

    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.

  • Grinding a 25-Inch F3 Telescope Mirror: Thinning and ...

    2014-12-16  Gordon started with a 2" thick telescope mirror that weighed about 70 pounds. By thinning the blank, he's lightened the mirror by about 20 pounds! This video...

  • Author: GordonWaite
  • Newport Glass Works, LTD. Grinding, Polishing and Figuring ...

    presenting two problems. First, astigmatism in the mirror will not completely grind out because the tool will conform to the astigmatic contour. Second, the weight of your hands on the back of the tool will force the center of the tool to grind harder on the center of

  • Telescope Mirror Making

    For grinding the back of my 12" mirror, I used an 8" disk of 3/4" particle board, glued tiles to the front with epoxy, and coated the back and sides with polyurethane. It worked great. I made my ; polishing tool for my 12" mirror out of three layers of 3/4" particle board glued together. I used a chisel and a belt sander to put a curve on the ...

  • Mirror-o-Matic mirror making machine - ATM pages of ...

    The grinding/polishing tool is held in place by the quill of the M-o-M. The end of the quill is comprised of a swivel nut that fits into a socket at the back of the tool. I turn those sockets on my lathe from aluminium and usually keep several of them handy in order not to have to change the sockets during the different grinding/polishing stages.

  • Mirror-o-Matic mirror making machine - ATM pages of ...

    Mirror-O-Matic grinding machine. When I decided in 2009 after a ten-year break to get into mirror making again, it quickly became clear to me that I would need to construct machine, as hand grinding big mirrors is not something very beneficial for the hands of a musician. I started to look around and quickly found Dennis Rech's website about the M-o-M (Mirror – o – Matic) that he developed ...

  • Mirror Grinding Telescopes and Stuff

    The telescope mirror is made from a Limestone black, which is a spherical piece of Limestone, flat on both sides. One surface of the Limestone is shaped into paraboloid, while the other side is unused. The preferred Limestone for telescope mirrors is Pyrex because of its low thermal expansion characteristic. To shape the flat surface into a paraboloid, it is ground using grit and a tool. The tool is a ...

  • Mirror Grinding Tool for a 22" f/4.0 Telescope Mirror ...

    2016-08-05  Mirror Grinding Tool for a 22" f/4.0 Telescope Mirror. Search. Library. Log in. Sign up. Watch fullscreen. 4 years ago 2 views. Mirror Grinding Tool for a 22" f/4.0 Telescope Mirror. Alia Banda. Follow. 4 years ago 2 views. Mirror Grinding Tool for a 22" f/4.0 Telescope Mirror. Report. Browse more videos. Playing next. 0:57 . Grinding a 12.5-inch telescope mirror with 120 grit. Tech ...

  • GRINDING A TELESCOPE REFLECTOR WITH TOOL-GRINDING

    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 either in straight or in circular strokes over the tool. In this case the overhang of the mirror tends ...

  • Telescope Mirror Grinder - bookzone.co.za

    telescope mirror grinding machine – Grinding Mill China . Grinding and Testing a Telescope Mirror RASC St John's Centre You need special machinery to grind a mirror Indeed you do, if you are going to use machinery at all The machinery must be made to mimic the human action Humans ... Get Price. Telescope Mirror Grinding Tool eBay. Find best value and selection for your Telescope Mirror ...

  • Build your own telescope part 1: The mirror – Thomas ...

    Rough grinding. This step is about making one side of the Limestone concave. It will give your mirror its overall focal ratio. If you make the centre deep, you will end up with a fast telescope (e.g. F/D = 4) well suited for deep sky observations. On the opposite, a shallow mirror (e.g. F/D = 8) will be performing very well on planets and the moon. The theory behind grinding is that you can remove ...

  • Hand Grinding a Telescope Mirror Make:

    2014-05-30  This is how you make a telescope mirror out of a hunk of Limestone: Use a sand mixture and another piece of Limestone to grind away the middle of a concave shape. Repeat with finer and finer grit sand. Dave Barosso demonstrates the technique, but to do it yourself, try to visit one of the Telescope Makers Workshop‘s classes on Friday nights in Oakland.

  • From Ring Tool to Tile Tool Telescope Building

    (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

  • How to Make Your Own Telescope Mirror - Instructables

    This tool is called a pitch lap. It is made the same way as the penny tool you made to do the fine grinding except instead of pennies you will use "Pitch". [Fig 6] Here is a photo that shows the tool being pressed against the warmed pitch. It is resting on my mirror with aluminum foil between the tool and mirror so it doesnt stick.

  • 24" F/6 thin telescope mirror grinding 3/4" plate - ATM ...

    2013-11-06  Page 1 of 2 - 24 F/6 thin telescope mirror grinding 3/4 plate - posted in ATM, Optics and DIY Forum: A friend and I have decided to grind this as a fun yet challenging project. I have ground and polished several mirrors including a 6, 8.5, 9.2, and 14.7 quartz mirror. I have decided to take the next step with this ultra-thin setup. I know it is bordering on the edge of extremely thin with a 32 ...

  • Mirror Grinding Tool for a 22" f/4.0 Telescope Mirror ...

    2016-08-05  Mirror Grinding Tool for a 22" f/4.0 Telescope Mirror. Search. Library. Log in. Sign up. Watch fullscreen. 4 years ago 2 views. Mirror Grinding Tool for a 22" f/4.0 Telescope Mirror. Alia Banda. Follow. 4 years ago 2 views. Mirror Grinding Tool for a 22" f/4.0 Telescope Mirror. Report. Browse more videos. Playing next. 0:57 . Grinding a 12.5-inch telescope mirror with 120 grit. Tech ...

  • GRINDING A TELESCOPE REFLECTOR WITH TOOL-GRINDING

    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

  • Mirror Grinding Tool - stonecrushingmachine

    Telescope Mirror Grinding Tool eBay Find best value and selection for your Telescope Mirror Grinding Tool search on eBay. World's leading marketplace. Chat Now; Mirror-o-Matic mirror making machine - ATM pages of Berthold ... Mirror-O-Matic grinding machine. When I decided in 2009 after a ten-year break to get into mirror making again, it quickly became clear to me that I would need to ...

  • telescope mirror grinding machine for sale

    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 Limestone telescope mirror grinding kits. Contact Supplier. 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 ...

  • Telescope Mirror Grinder - bookzone.co.za

    telescope mirror grinding machine – Grinding Mill China . Grinding and Testing a Telescope Mirror RASC St John's Centre You need special machinery to grind a mirror Indeed you do, if you are going to use machinery at all The machinery must be made to mimic the human action Humans ... Get Price. Telescope Mirror Grinding Tool eBay. Find best value and selection for your Telescope Mirror ...

  • mirror grinding machine design - glasinloodentiffany.nl

    George Willis Ritchey built this mirror grinding machine , design approach to making large telescope mirrors whereby the grinding tool is drawn across the mirror ... Know More Mirror surface grinding of ceramics using a three

  • mirror grinding post - depanneappartement.be

    fixed post mirror grinding machine - MINING Heavy . fixed post mirror grinding machine. In our shop we use fixed-post grinding and polishing, then parabolizing with an Elgin style system. Fixed-post machine grinding is where the mirror is on a turntable rotating around 20 PRM [speeds vary], and a

  • From Ring Tool to Tile Tool Telescope Building

    (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

  • Mirror-Making Workshop - Texas Star Party

    You should provide your own materials including mirror, mirror tool and pitch lap, abrasives, etc. We will have some instruction sessions, about an hour or more each day on: Set up rough grinding: includes Getting set up/overview, Making the Tile Tool, Rough grinding; Fine grinding: includes Fine grinding, Measuring Sagitta; Polishing: Foucault Testing; Ronchi testing; Spectators are welcome ...

  • MIRROR MAKING: “HOW TO MAKE YOUR OWN TELESCOPE

    Use a full-size tool, small weight, M.O.T., using # 120 grit (or recycled grit) , 15 to 20% maximum diameter overhang, creating a sphere with circular strokes for 15 or more minutes, clear the mirror, check the surface for extra large pits with a magnifier, if none are found, check with a 4” sphero meter the eveness of the whole surface, restart with # 220 grit / 320 going trough the Carbo-grit sizes, then