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After fine grinding is complete, the mirror must be polished. It is during polishing that you figure the mirror by using a different polishing stroke to change the mirrors spherical polished shape into a parabolic polished shape . See a related tutorial nearby titled, Making A Mirror Polishing And Figuring Tool .
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.
Dec 15, 2014 Then using both hands, we carefully place the mirror face down on top of the tool. 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 ...
Please see the Buy Telescope Mirror Blanks page for low prices on plate glass mirror blanks. If youd 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.
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.
Mirror Grinding Tool for a 22 f4.0 Telescope . 582016 Mirror Grinding Tool for a 22 f4.0 Telescope Mirror. Report. Browse more videos. Playing next. 057. Grinding a 12.5-inch telescope mirror with 120 grit. learn more Mirror Grinding Machine Ahmedabad. Mirror Grinding Tool- SOF Mining machine. Lens Mirror Making Best Lenses And ...
For grinding the back of my 12 mirror, I used an 8 disk of 34 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 34 particle board glued together. I used a chisel and a belt sander to put a curve on the ...
Rough grinding. This step is about making one side of the glass 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. FD 4 well suited for deep sky observations. On the opposite, a shallow mirror e.g. FD 8 will be performing very well on planets and the moon.
telescope mirrors, blanks, tools, testers, grinding materials, polishing materials, aluminising, mirror box, ronchi, laser, foucault, telescope mirror aluminising mirror size ins aluminium quartz r 91 aluminium enhanced r 95 silver enhanced protected r 98 6 210aud 245aud 275aud 8 270aud 305aud 342aud 10 330aud 365aud 409aud ...
Glass tools can stick and cause scratches in larger sizes. More importantly, the glass tool can be saved and used later as a mirror blank for a second project. Grinding Stands. I use an old printer stand. Here is a 25 inch 635cm mirror being rough ground followed by a beautiful grinding stand from the Delmarva Mirror Making Seminar. Grinding ...
Mar 06, 2006 The larger one is for grinding and polishing mirrors and is also used at higher speeds to centrifugally cast resin mirrors, an experiment I am playing with in my spare sic time. The smaller mirror is used for power wrapping epoxy impregnated fiberglass around mandrels for making tubes and cylindrical components for open trusses.
Jun 12, 2016 What are the best sources for mirror blanks - posted in ATM, Optics and DIY Forum Ever since I found Stellafanes mirror making page, Ive been itching to build my own telescope. Im going to start with a 6-8in. Newt the classic beginning ATM project. All I need now are the materials I can find the yogurt containers pretty easily. For the rest of it, I had to do a little searching.
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. ... The grindingpolishing tool is held in place by the quill of the M-o-M.
When the wet comes to the end, stop grinding, separate the mirror and the tool, and more water and grit, then continue. If you have a tile tool, you can slop some water and grit on from the side without separating the mirror and tool, but dont drag the tool off on the edge of the mirror -
Complete details on grinding and polishing the mirror. Has a sturdy equatorial mounting. amp Plans from a Bygone Era. We do not photocopy these.
May 30, 2014 This is how you make a telescope mirror out of a hunk of glass Use a sand mixture and another piece of glass 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.
Telescope Mirror Grinding Machines Mc World. Grinding Machine for Large Telescope Mirrors. 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 ...
Back to grinding Not long after I made my lap tool, I decided to make a tile tool the same way. So, I went off to Home Depot and found they had stock of the right kind of 1x1 tile for 6 a sheet. Since I had a few mirrors I want to make and some other ATMers in town might need tiles, I bought a box of 10.
Mar 10, 2006 The convex tool is then placed upon the spindle of the machine while the glass disk to be ground is held immediately above it by means of the mirror holder. The ratio of speed between the main spindle and the eccentric arm can be varied in the initial stages of grinding and polishing. For most purposes a spindle speed of six times that of the ...
We recommend Pyrex over plate glass simply because it is much easier to build your first mirror with pyrex. The low coefficient of expansion of Pyrex makes a difference during the grinding process. Plate Glass, particularly thin blanks, can be warped by the warmth of your hand, expandings the glass into the tool, and grinds unevenly.
Rough grinding powders for grinding mirrors to the required curve starting with flat non diamond generated mirror blank and grinding tool. Three grades of coarse grinding powders are listed below. The table advises the probable amount of each grade of powder needed to grind the mirror sizes listed.
Grinding the secondary is just like grinding any other optic except in minature. I ground the secondary with the mirror on a workstand and worked the tool on top just like I would grind a larger mirror. This optic is small enough that a lens grinding machine could work well.
A New 20 f3.5 Fast Mirror on Quartz, Part 1, Measurements added 050310 Ronchi and Foucault Tests on the 20 f4.5 Quartz Telescope Mirror added 042910 Figuring a 20 Mirror, Part 1 Reducing a High Zone. Figuring a 20 Mirror, Part 2 Smoothing and Blending Techniques. Making a Ceramic Tile and Dental Plaster Grinding Tool
Did you mean telescope mirror Best Seller in Machine Tool Inspection Mirrors Ullman Devices HTC-2 High-Tech Telescoping Inspection Mirror, 2-14 Diameter, 6-12 to 36-38 Length
Still grinding your own mirror is a key skill that makes you a real telescope maker. To grind a telescope mirror by hand you simply attach a glass tool the same size as your mirror blank to the top of a small, strong stand. You apply grinding compounds to the tool and place the mirror blank on top.
Using the correct grinding stroke results in the mirror becoming concave as the tool becomes convex. This process is continued until the mirror reaches the desired curve. The process was all done by hand, and took several weeks of Saturdays, and raised a few blisters. Photo 2 shows the mirror at the end of rough grinding.
Anyway, its amazing the precision you can achieve simply with some glass, grit, pine pitch and a lot of work. Ive heard that this is literally the highest amount of precision a human can achieve with simple hand tools Just grinding the telescope mirror probably took 80-100 hours for me, but I was learning a lot and taking my time.
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
Jul 08, 2012 Mirror grinding tile tool - posted in ATM, Optics and DIY Forum Hi all, Im about to begin crafting a mirror grinding tool out of plaster and tile. In researching how to make the tool, Ive ran across some conflicting instructions. Would I create the tool flat or make it convex in accordance to the final shape of my mirror an 8 f8 parabola
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 amp rough grinding includes Getting set upoverview, Making the Tile Tool, Rough grinding