A course diamond grinding drum is installed on the grinder. It will be used to take off the rough edges, and make blanks truly round. Then a switch to a finer grinding drum will clean up the edge. The edge grinder is done! Here I am doing a dry run to make sure everything works. A 13.5 diameter wood disk has been installed on the grinder.
How to Make Your Own Telescope Mirror: [Fig 1] This is a large piece of glass a woman off Craigslist gave me. It was 40"x40" and 0.75" thick. Its what I decided to use to make the mirror. Cutting it into smaller sections can be difficult but scoring it with a …
Gordon Waite sets up his fixed-post mirror grinding machine to begin rough grinding on an 11 f/4.3 telescope mirror. He uses a grinding tool made from dental plaster and steel pieces to speed up grinding. Gordon shows the setup for spin grinding at high speeds and with added weights to get the job done as fast as possible.
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.
Get Images Library Photos and Pictures. telescope mirror grinding / polishing machine with tachometer - YouTube Mirror grinding Petzval Lens New Assignment for Telescope: Better Measurements of Dark Energy Oct. 3, 1947: Birth of Palomar's 'Giant Eye' | WIRED Document sans nom Astro-Tel - Mirror grinding machine . OptoTech NC-Controlled Grinding, Lapping and Polishing …
Making a Mirror takes Hundreds of Hours of Work. Not True! A 6" or 8" mirror should take about 40 to 80 hours of effort. While this is a non-trivial amount of time, the mirror can be completed in a few months, and certainly within a year. Most people work one to three hours a day on their mirror …
A To make a telescope mirror from a flat disk (of glass), the flat surface has to be changed to a spherical / parabolic surface, because a flat surface can only reflect light in the same opposing angle as it comes to the surface, but for a enlarged view to be seen, the light has to come to a small focal point, at our eye or camera lens, therefore the surface is changed by grinding and ...
Mar 8, 2021 - Grinding machine for mirrors up to 42 inches [1.1m] in diameter. Can be configured for spin or stroke work.
Making a telescope mirror. To start, a new mirror blank is "sanded" down to create a precise parabolic curve in a process called grinding. To do that, the blank is …
This video shows how to setup a mirror grinding machine for fixed-post grinding, also known as spin grinding or spinning. After setup, you'll see how abrasi...
By Giulio TiberinI March 12, 2018 Roughing and grinding machines mirrors, mirror making, tools Small tutorial on using "minimum" software POLSIM for the machining of a parabolic mirror for telescope, "Assisted" by the use of a simple rotating plate, even in the digging operation of the "arrow" of the initial spherical concavity.
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 second...
The goal. The goal of parabolizing is to produce a mirror that focuses light perfectly at the highest powers. Our mirror must meet the following two criteria: 1. The wavefront at the eyepiece cannot vary more than 1/4 wave of green light peak to valley and should be much less than this over much of …
Answer (1 of 3): Small mirrors such as the ones you'll find in amateur astronomer's telescopes are ground to a specified shape. Commercial manufacturers usually use computer-controlled grinding machines to standardize their production runs. Amateur mirror-makers grind their mirrors by hand, testi...
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.
telescope mirror grinding machine. Build Your Own Telescope, Mirror-O-Matic grinding machine When I decided in 2009 after a ten-year break to get into mirror making again, . Get More mirror grinding machin - ATM, Optics and DIY Forum, Get Price.
I built an 8 inch telescope about 6 years. The grinding of the mirror was done at home. It took more than a month to finish the mirror grinding and getting it silvered. The mount was also built and enjoyed viewing the craters of the moon and especially Saturn …
The other way to make a light-weight telescope mirror is to keep the mirror thick so it will be stiff, but remove pockets of glass from the back in such a way as to lighten the mirror without compromising its stiffness. ... Rough grinding is complete for the 12.5 inch honeycomb-back telescope mirror blank. The rough grinding went pretty quickly ...
The machine is shown grinding a 300 mm mirror.How to build a tachometer:
Page 1 of 5 - Making a Mirror grinding & Polishing machine - posted in ATM, Optics and DIY Forum: Hello, I am on the half of the way to make a mirror grinding machine inspired by original M-O-M design. I made the pulley arrangement such a way that, both the turn table & eccentric spins at 50 RPM fixed. I wont go for making mirror bigger that 10.5 (or max 12).
If you want to make a mirror that you will turn into your primary, visual use telescope, 1200 mm focal length would be recommended. That would make a 150 mm F8, or a 200 mm F6 mirror. First phase : rough grinding (or hogging out)
Making A Mirror Grinding Tool By Allen Malsburry The average person would never think, "I can make my own telescope." Most amateur astronomers believe, "I can buy a better telescope than I can build." Neither is actually correct. For many decades now, amateur …
This is why you don't want to make mirrors to be worked on machines too thin. For 16" to 18" mirrors, 1.62" thick is the thinness I would recommend. There are several ways to support the grinding and polishing machine turntable, but first make …
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.
Apr 29, 2010· Fine Grinding a 20" Quartz Telescope Mirror. Rough Grinding on the Fixed-Post Mirror Grinding Machine. Hogging the Curve on a 20" f/4.5 Quartz Telescope Mirror. Astronomy magazine names Waite Research's Renegade telescope a top astro product of 2015. The 20" Renegade telescope offers fabulous viewing without climbing a ladder.
Mirror Grinding Kits. hand grinding a telescope mirror, 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 ...
Making a telescope mirror is one of the most satisfying and sublime joys you will experience. It's also arguably the most accurate surface made by man or machine. If the mirror is expanded to the size of a football field, then the mirror's surface will be smooth to 1/1000 inch or 1/30 millimeter!
In fact, one of the great telescope making companies of all time, Cave-Astrola, used retaining rings. The amount of glass lost is 1-2%, an amount that is completely unnoticeable at the eyepiece. Professionals have quoted twice the price for mirrors good to the extreme edge. For twice the price or twice the effort, one can make a larger mirror.
A mirror mount is needed to hold the mirror during testing. If the mirror is a 'thin' mirror (i.e. the thickness is much less than 1/8th its diameter) then the mount must hold the mirror without deforming it. The weight of the glass can deform a thin mirror. In my case, I was making a full-thickness mirror, which is a mirror whose thickness is 1/8th the diameter or more, so mirror deformation ...
Mirror Grinding Machine. The true test of the amateur astronomer is building their own telescope. Grinding and polishing your own mirrors is a long, …
