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Don't discard the grinding tool or put it to other uses; it may be required again if you find that you have astigmatism in the mirror after your first polishing period. Part two of this article will discuss pitch laps, polishing, figuring, testing, and most important for big mirrors, test interpretation.
Grinding, Polishing and Figuring . ... If you plan on working your mirror by machine, ... ways to support the grinding and polishing machine ... Get Price; mirror grinding machine – Grinding Mill China. Related Products. sba grinding machine Crusher SBA Roll Shop Solutions bought this,Draper Mirror Grinding Machine Mining Machinery . Get Price
mirror grinding machine plans vivekanandvidyapeeth. A history of polishing machines AstroSurf- mirror grinding machine plans,As often in sciences and technology, Leonardo da Vinci was a pioneer, creating machines . Get Price
mirror grinding machine plans vivekanandvidyapeeth. A history of polishing machines AstroSurf- mirror grinding machine plans,As often in sciences and technology, Leonardo da Vinci was a pioneer, creating machines . Get Price
It gives the polishing lap a smooth, velvety feel. Care is needed in its use since it does not readily wash out of clothes. Ideal for the final 8 to 10 minutes of figuring when fast changes can cause you to overshoot the desired curve. The polishing stage of mirror making accomplishes two things.
Mar 16, 2015· Page 2 of 5 - Making a Mirror grinding & Polishing machine - posted in ATM, Optics and DIY Forum: The machine I made is just driven by a drill press and pulley system. Variable speeds could be nice, but so far this system has worked. The turntable goes about 40 RPM for spin grinding and polishing, which works quite well. I can add a reduction and the table then goes about 6.5 RPM, .
For this, he used a polishing machine which he described as early as 1841, for the benefit of the Royal Society. Later on, still another amateur, a rich merchant, William Lassell (1799-1880), used a polishing machine for the creation of large-sized mirrors (notably a 122cm mirror that was set up .
A good starter size is the 150 mm (6") mirror. A 200mm (8") will also work. Most ATM books and websites recommend a Pyrex® mirror blank, but in my opinion, annealed plate glass is better for this first, "learn and practice" mirror.It is cheaper, it is softer and grinds faster, needing less abrasives and with these small sizes, the low expansion glass like Pyrex has no practical (visible at ...
new grinding machine and 23,5" mirror project - ATM, Optics and, Page 1 of 4 - new grinding machine and 23,5 mirror project - posted in ATM, Optics and DIY Forum: Hello folks!I have been an ATM since 1992 and would like to share you some videos and pics in, It took several years to finish this machine, If you will use just one sheet, this
Some Practice Figuring a Mirror With fine grinding completed, I was ready to polish the mirror. However, as mentioned earlier, the last time I polished a mirror was in 1982. More importantly, I had no skill parabolizing a mirror. I wanted to learn how to parabolize a mirror before taking on the 14.5 inch.
The problem with thin mirrors is that they flex more easily during grinding and polishing, making it hard to achieve the required surface precision. They also need a more complex mirror cell (additional support points). Plop is a useful software to let you calculate the number of points needed based on the diameter and thickness of the glass:
Astronomy, telescope making,mirror grinding and testing Large Thin Mirror Making by Mel Bartels Grinding Machines Mirror-o-matic Tom Waineo's Desktop Grinding/Polishing Machine Ken Lilja's Grinding Machine Grinding Machine Figuring Figuring a Paraboidal mirror by thermal predistortion Optical Testing The Basics of Telescope Testing Test Stand
Home Made Mirror Grinding Polishing Machine Detailed Plan. Mirror grinding machine plan - moredentin astronomy options astronomy, mirror making,, i have been considering a larger refined telescope designso with the 47 online mirror grinding machine plans -, 16 apr 2012, also, there is a plan to move the grinding machine,, telescope mirror grinding machine based on dennis rechs m .
Grinding Machine for Large Telescope Mirrors I designed and built a grinding machine for mirrors up to 42 inches [1.1m] in diameter. By slipping on and off a couple of belts, the machine can quickly be reconfigured for spinning work or for stroking work.
Grinding, Polishing and Figuring . ... If you plan on working your mirror by machine, ... ways to support the grinding and polishing machine ... Get Price; mirror grinding machine – Grinding Mill China. Related Products. sba grinding machine Crusher SBA Roll Shop Solutions bought this,Draper Mirror Grinding Machine Mining Machinery . Get Price
A computer can be a useful tool when machine-figuring a mirror. It may be used more or less extensively : Automatic piloting of the machine : Up to now, all the projects of robotization of a polishing machine have remained extremely confidential among the ATM community.
Dec 16, 2002· 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.
Diamond grinding and polishing must be carried out under lighter pressures, especially when polishing pre-hardened steel parts and polishing with fine abrasive pastes. When polishing with 8000# abrasive paste, the common load is 100-200 g/cm2, but it is difficult to maintain the accuracy of this load.
Feb 14, 2014· In three segments, Gordon Waite gives tips for polishing and figuring an 8" telescope mirror. Gordon demonstrates the standard polishing stroke. Plus .
Sep 29 2010· Mirror Grinding Machine - posted in ATM Optics and DIY Forum I have some interest in building a grinding machine for possible up to an 18 mirror but something that will also do a 6 or 8 mirror I have plans for the Mir O Matic but would like to do something a bit more modern I have some ideas about using a AC drive and a large aluminum disk for the turntable .
News; Diy Is It Possible For A Hobbyist To Create A Lens. 2019104Is it possible for a hobbyist to create a lens element Ask Question find the link now but I saw an argument once that grinding and by extension polishing a good lens is easier than grinding a mirror since the curves for a as at this point its the same as polishing a mirror surface except perhaps for the steeper curve.
Apr 25, 2020· I recently built a mirror-o-matic machine, and have attempted to grind my first mirror. Ironically, I am finding working the glass to be more difficult and frustrating than building the machine :(My mirror is 208 mm in diameter and my tool is 155mm in diameter (~75%). I followed the instructions for fixed post grinding (by Dennis Rech), and ...
Figuring a 'Perfect' Mirror. Well, nothing is ever perfect but we plan to polish our 30 year old mirror until the mirror figure is better than can be used under most seeing conditions. Since the mirror is already good to about one half wave we feel that the Ronhi test at the center of curvature will only help until the mirror is better than one 1/4 wave, or so.
Mirror grinding - scope making. A good starter size is the 150 mm (6") mirror. A 200mm (8") will also work. Most ATM books and websites recommend a Pyrex® mirror blank, but in my opinion, annealed plate glass is better for this first, "learn and practice" mirror.It is cheaper, it is softer and grinds faster, needing less abrasives and with these small sizes, the low expansion glass .
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