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The M-o-M is a marvellous machine due to its simplicity and yet refined design. It is extremely flexible accommodating mirror sizes from 4 inch up to 20 inch with slight modifications and can be used for all three steps necessary in producing a mirror. That is you can use it to grind, polish and figure your optics.
One problem I face during construction was that all measurements and plans are done in imperial units since the machine has been developed in the United States. I had to make a choice between building using imperial units with all the problems associated like hardware and machine standards, or convert the plans and metric units. I opted for the latter and I will eventually post the modified plans on this web page once I find time drawing them up.
Another difficulty was to find certain hardware which might be very common in the United States but very hard to find in other countries and in particular in Spain. In the sidebar of this page and in the links section of my website you can find some references pointing towards shops and online stores that might stock those items.
I slightly modified Dennis design in particular concerning the choice of motors and motor control. You can find those modifications documented in the gallery section of this page. I would also like to draw your attention to theM-o-M Yahoo groupthat offers extensive support for construction and operating that type of mirror grinding machine. Make sure also to checkout my M-o-M videos that show the machine in action
Mar 06, 2006nbsp018332Making 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 12 shaft size pillow block bearings work good for a homemade EQ mount Thank you , John
My Mirror Grinding Machine. For a long time Ive wanted to build a machine for grinding telescope mirrors. Dennis Rechs M-o-M designs finally inspired me to just get up and do it. Over the years, Id been collecting motors, gear boxes, pulleys, etc. Most of them came from industrial junk yards.
A good starter size is the 150 mm 6quot mirror. A 200mm 8quot will also work. Most ATM books and websites recommend a Pyrex174 mirror blank, but in my opinion, annealed plate glass is better for this first, quotlearn and practicequot 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 ...
The worlds largest grinding machine was built. The glass company had reported that bubbles in the glass might be a problem, but the astronomers insisted on seeing for themselves. But when the disk arrived at the observatory shops in Pasadena in December of 1908, on the same day that the 60- inch mirror was placed in its mounting on Mount ...
Insaco, Inc. Lens Grinding amp Polishing Specialized Lens Generating and Polishing Equipment allows Insaco to Manufacture a wide variety of Lens in Sapphire and other Optical Materials. Since 1947 Insaco has been a precision machining and polishing fabricator of parts from all technical ceramics, sapphire, glass and quartz. We machine these materials to very precise tolerances many times ...
Currently manufacturing a 16 diameter 1 thick plate glass f3.88 Newtonian telescope mirror. Doing this with my new fixed post grinding machine built this summer. Work is progressing well, and very efficient. Started project in August 2013 and at this point I am ready to move on from 25 micron White Aluminum Oxide to 9 micon White Aluminum ...
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. The machine can also work smaller mirrors if the drip pan is moved to the fast shaft on
Telescope Mirror Blanks Providing telescope mirror blanks and kits to telescope makers. Mirror blanks are individually tested for internal strain. Plastic protractor inserted under a 6 inch mirror blank during a stress test, to illustrate what stress would look like - if there were any present.
Aug 19, 2019nbsp018332Gordon 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
Lens grinding and polishing is very delicate and precise work. It is also very heavy manual work and very time-consuming. To lighten this hard labour for himself, Christiaan designed and built his own lens-grinding and -polishing machines Figure 2. One of the greatest problems with lens grinding is to make a suitable lap by
Grinding, Polishing and Figuring Thin Telescope Mirrors . Part 2 - Polishing . Abridged from an article appearing in Telescope Making 13 Provided Courtesy of Astronomy Magazine ... Normal machine polishing techniques are not as efficient as hand polishing in these sizes. But dont get me wrong about machine polishing it is the only way to go.
Using the Telescope Mount. One late afternoon, I set up the telescope to see how well the new mount functioned. The truss tube section attached to the mirror box without any problems. The telescope did require a 6 lb weight in the back to get it properly balanced. When the first stars appeared I aimed the telescope at one of them and took a look.
Grinding it round is not very difficult, especially if your piece has enough sides - its just a matter of grinding off the high spots. I use a hand-size piece of tile and 80 grit. Grinding by hand against the outside of the glass, Ive made a 16quot with 30 sides presentable in 2
Machine For Grinding Telescope Specula W. Forgan The simple addition to an ordinary lathe for the purpose of grinding telescope specula has been of so much benefit to the author that it was thought, if made known through the medium of the Society of Arts, it might become useful to others interested.
Sep 26, 2006nbsp018332Grinding and polishing your own mirrors is a long, arduous process. Instead of lapping the blank by hand, Laurie Hall built this mirror grinding machine from scratch.
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 mirrors diameter are normal.
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Making is the Key to Knowing. A telescope mirror is arguably the most accurate surface made by human or machine. Amazingly you can grind a mirror by hand and make a telescope with simple hand tools. With such a telescope, Saturn with its rings are stunning. The
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