telescope mirror grinding machine

Stellafane ATM: Measuring SagittaBefore you start grinding, you should have decided on your mirror's desired focal length. The two most common beginners' mirrors, the 6" f/8 and 8" f/6, both have 48" focal lengths. Use this formula to calculate your target sagitta: Sagitta (s) = Mirror_Radius 2 / ( 4 × Focal_Length ) = r 2 / 4FTelescope Grinding - YouTubeJun 05, 2009· This machine can grind and polish using different stroke patterns, i.e. w-stroke, short strokes, long strokes, etc. Currently this machine can only operate a mirror/lens up to ~250mm size glass. I keep the lens/mirror in a bath with a pump to agitate the water and cerium oxide or whatever I happen to be grinding/polishing with.

Stellafane ATM: Measuring Sagitta

Before you start grinding, you should have decided on your mirror's desired focal length. The two most common beginners' mirrors, the 6" f/8 and 8" f/6, both have 48" focal lengths. Use this formula to calculate your target sagitta: Sagitta (s) = Mirror_Radius 2 / ( 4 × Focal_Length ) = r 2 / 4FTelescope Grinding - YouTubeJun 05, 2009· This machine can grind and polish using different stroke patterns, i.e. w-stroke, short strokes, long strokes, etc. Currently this machine can only operate a mirror/lens up to ~250mm size glass. I keep the lens/mirror in a bath with a pump to agitate the water and cerium oxide or whatever I happen to be grinding/polishing with.Fixed-post machine grinding is where the mirror is on a turntable rotating around 20 PRM [speeds vary], and a 75% tool is on top. They are already curve-generated. The tool is hanging over the mirror by 1/6 the diameter of the tool, or about 1/8 diameter of the mirror, and is fixed in this position.

To Grind a Telescope Mirror | SpringerLink

Abstract. This exercise is not intended to make a perfect piece of optics, but just to show the principle of the methods used in practice and to convince our students that amateur telescope making is surprisingly simple and accessible.Document sans nom - AstrosurfGrinding action of a polishing lap : ... During polishing and figuring of telescope mirrors the translation movement is generally chosen, because of its overall effect, preferably to the rotation movement, with its non-linear wearing off effect, which is hard to control to obtain a regular shape, free of zonal defects. ... machine figuring a ...diy lens grinding machine - cafeceesMirror 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. Get Price; Amateur Telescope Making Main PageStellafaneMirror-o-maticThe Machines: Documentation: Information for ATMs Zip archive of Mirror-o-Matic Yahoo Groups () 307 MB Contact Dennis ...Mirror - CNC single head polishing machine - YouTubeNov 27, 2015· telescope mirror grinding / polishing machine with tachometer - Duration: 1:34. Florin Andrei Recommended for you. 1:34. DONATONI - polishing and shaping a large piece of granite ...

Telescope Mirror Making: Part 3, Rough Grinding - YouTube

Sep 23, 2012· 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 ...Obsession Telescopes / OpticsA telescope mirror is designed to form a diffraction limited image of a point source. Ideally, a certain percentage of the light in the image will fall within the diffraction disk diameter. The Strehl ratio compares the mirror's .Building a fixed post mirror grinding machine ...Aug 19, 2019· Gordon Waite is probably one of the better mirror makers using this machine and have incorporated some of his ideas into my plan. I like the fixed-post plan vs others with eccentric drives, because it gets the heavy grinding done in an automated .Making a homemade mirror grinding machine - ATM, Optics ...Mar 06, 2006· Making a homemade mirror grinding machine - posted in ATM, Optics and DIY Forum: I want to make a motorized mirror grinder, any good info on this, i have a couple geared motors, low speed high torque. One more question ...will 1 1/2 shaft size pillow block bearings work good for a homemade EQ mount? Thank you, John

Leviathan of Parsonstown - Wikipedia

Construction and Design. Parsons improved the techniques of casting, grinding and polishing large telescope mirrors from speculum metal, and constructed steam-powered grinding machines for parabolic mirrors.His 3 feet (91 cm) mirror of 1839 was cast in smaller pieces, fitted together before grinding and polishing; its 1840 successor was cast in a single piece.Document sans nom - AstrosurfAs often in sciences and technology, Leonardo da Vinci was a pioneer, creating machines for the production of optical devices. Indeed, between 1513 and 1517, he imagined machines to grind and polish telescope mirrors, which, at the time, were made of bronze.Astro-Tel - Mirror grinding machineMIRROR GRINDING MACHINE. I made my first mirror grinding and polishing machine over thirty years ago. It used the working principle of the machine illustrated at "A" Fig.3, Page 163, "Amateur Telescope Making" Book 1. A bowl which rotated was fitted to the spindle. I also built another machine of the same type.Telescope Mirror Blanks / TelescopeMirrorBlanks.Com ...Please see the Buy Telescope Mirror Blanks 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.Making a homemade mirror grinding machine - ATM, Optics ...Mar 06, 2006· Making a homemade mirror grinding machine - posted in ATM, Optics and DIY Forum: I want to make a motorized mirror grinder, any good info on this, i have a couple geared motors, low speed high torque. One more question ...will 1 1/2 shaft size pillow block bearings work good for a homemade EQ mount? Thank you, John

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