Jul 19, 2010 An ultra precision large optics grinding machine, BoX , was developed and produced at Cranfield University. BoX offers a rapid and economic solution for grinding large off-axis aspherical and free-form optical components. Grinding high accuracy surfaces with low subsurface damage reduces subsequent polishing time.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 them came from industrial junk yards.Mar 04, 2021 Up for sale is my telescope mirror grinding machine pottery wheel. I used this machine to grind a telescope mirror and it worked great. No walking around the barrel. Could be adapted with an overarm for a fully automated grinding machine. $125 shipped to CONUSA. Includes 3D printed mirror holder (mirror blank not included as seen in.
The Kutter Schiefspiegler. Yolo Telescopes. Grinding Glass. An ATM's Grinding Barrel Top. Grinding Your Telescope Mirror. Polishing Your Telescope Mirror. Glass Notes. Grit and Microgrit Grading Conversion Chart at READE. Making a tile on plaster tool.Aug 19, 2019 Hello all, I'm fascinated by those who can grind and figure their own mirrors for reflecting telescopes. With the availability of kits to finish beautiful ATM dobs from companies like dobstuff, the lure of building one's own scope to high tolerances and good performance is clearly doable. So.
Stiff and well damped grinding machines such as the Tetraform . These machines demonstrated high performance grinding on small scale parts. The Cranfield BoX grinding machine has been developed based on this philosophy  to provide metre scale optics at high removal rates whilst minimising levels of sub-surface damage (SSD).So, in 1998 I decided to make a new planetary telescope that would be larger in size and with better quality optics. The Mirror Blank In 1999, a 14.5 inch diameter pyrex mirror blank (2.3 inches thick) was purchased as part of a kit that included a plate glass tool, numerous grits, burgundy pitch, and cerium oxide (CEO) polishing compound.
Figure 2 BoX grinding machine – 1.5 m capacity. As part of a low cost manufacturing process, the BoX machine is based on a dedicated compact design for large off-axis mirrors in the range of 1-2 metres size. While maintaining high form accuracy, the BoX machine was designed for rapid grinding and a relatively low cost grinding process.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.
The next generation of ground-based telescopes requires hundreds of meter-scale, off-axis reflective mirrors. To fulfill the fabrication demands, the Cranfield BoX ™ grinding machine was.Telescope. Back in the day, owning your own 10” telescope was huge. Today, with the low-cost imported telescopes, making your own telescope may not save you any money, but you definitely can build your own telescope, and almost any homemade telescope will have higher quality optics than the imported equivalent scope you can buy.
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 are.Telescopes, we thought of, being a ardent fan of science and experimenter. I planned to buy a telescope. When I went to the telescope shop it was so fascinating I ended up with a book on how to make a telescope and a 10 inch mirror. This was the beginning, where I made my own design for the 10 inch equatorial telescope.
You may notice that many commercial telescope advertisements proclaim they use Hand Figured Optics - in fact this is one of the best and least expensive ways to get an accurate surface on a mirror - most machines just can't hold the tolerances necessary, and any good telescope optic, including the mirror you could make in your kitchen, should.The I.A.U. named asteroid 17823 Bartels discovered 1998 by J.M.Roe in recognition for my contributions to amateur astronomy. 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.
An optical telescope which uses lenses is known as a refracting telescope or a refractor one which uses a mirror is known as a reflecting telescope or a reflector. Besides optical telescopes, astronomers also use telescopes that focus radio waves, X-rays, and other forms of electromagnetic radiation.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.
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