Thanks for the video Jim. I had no idea that these machines ran at those speeds. When I built my machine, I didn't have a computer or any books on building grinding machines so I built one that mimics the …

Grinding Large Thin Mirrors Part I Grinding,Polishing and Figuring Large Thin Mirrors - Part 2 - Polishing Astronomy, telpe 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

Page 1 of 2 - 24 F/6 thin telpe mirror grinding 3/4 plate - posted in ATM, Optics and DIY Forum: A friend and I have decided to grind this as a fun yet challenging project. I have ground and polished several mirrors including a 6, 8.5, 9.2, and 14.7 quartz mirror. I have decided to take the next step with this ultra-thin setup. I know …

Page 1 of 3 - Mirror Grinding - Take A Class Or DIY? - posted in ATM, Optics and DIY Forum: Ive been interested in grinding/polishing my own Newt mirror for a long time but dont know how to get started. As a beginner, would you recommend attending a workshop or class or is it possible to make a good mirror using other learning …

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 …

Page 4 of 5 - new grinding machine and 23,5 mirror project - posted in ATM, Optics and DIY Forum: The mounting of the glass in the kiln looks very precarious. I would be concerned about the possible failure of one of the supports and a catastrophic collapse resulting in damage to the blanks.

How I got started in ATM Optical Equipment Pitch tester, Strain testing setup, Mirror test stands, Spherometers, Slitless Foucault testers, Interference test setup, Small grinding machine, Large grinding machine Optical Articles, Tables, etc. Figuring with a full-size lap Oblate spheres and how to fix them A Tale of Four Flats

Wanting To Grind A 20" Mirror. Where Do I Start? - posted in ATM, Optics and DIY Forum: Im a complete newbie on this, other than my huge enthusiasm for wanting to look up at the night sky through a telpe. I want to build a Dobsonian using a 18 mirror. Is this a tough undertaking and dangerous for a new person? Should I be really …

Thanks Paul. I have been doing lots of looking on the internet and get lots of good ideas. The swivel turntable idea comes from an early 1900's large mirror grinder. Been in all the local bookstores and can not find a copy of ATM book. To produce a truly random grind, 2 motors would probably be better then. Will have to checkout the library.

mirror grinding/polishing machine - posted in ATM, Optics and DIY Forum: heres a pro-grade machine for a serious mirror-maker: https://vermont.crai...7055959911.html ... ATM, Optics and DIY Forum How to save the rubber of the eyecups? Rodrigator - Sep 08 2024 07:42 AM Binoculars Q re Oberwerk …

Types of mirror grinding machines - posted in ATM, Optics and DIY Forum: Hi to all, I am planning to make a mirror grinding and polishing machine but i have limited knowledge about these machines. Because of this i have some questions to someone who has some experience with those machines; - Some machines have fixed …

Mirror grinding machine construction log – JamesCrombie.com page1. Mirror grinding machine construction log I started thinking about building my own mirror grinding machine several years ago. Having been on the ATM list now since …

Page 3 of 5 - new grinding machine and 23,5 mirror project - posted in ATM, Optics and DIY Forum: Sir, may I ask a simpler question, how you fix the blank to position when you grinding edge? ... Challenging yes but doable for ATM. Making a kiln is a second option for me, the first is to hire a professional industrial kiln. Waiting an …

Page 1 of 2 - Making my own fixed post mirror grinding/polishing machine - posted in ATM, Optics and DIY Forum: Hey guys. Im thinking of making my own fixed post mirror …

Theories on designing a robotic mirror grinder. - posted in ATM, Optics and DIY Forum: So I have been thinking and doing some preliminary design work on a robotic telpe grinding machine with the intent to grind a 12 inch parabolic primary mirror for a telpe I intend to build. I have been trying to understand the mechanics …

1,427. Location: BE. Posted July 24, 2021. A few years back we made 3 MoM's. Two that can handle 20" mirror and a third one capable of grinding a 10" mirror. We built the two larger machines in my …

Replicating Ritchey Mirror grinding machine - posted in ATM, Optics and DIY Forum: Ive just returned from a few days with friends in Washington, DC. Being aviators and aircraft builders, we blew a whole day at the new Air & Space Museums new annex at Dulles airport.What really caught my attention however, was that they moved the …

Page 1 of 3 - 20" F3.8 mirror project - posted in ATM, Optics and DIY Forum: This has been a dream project of mine for many years (in fact for a few decades). After many fault starts over the years, finally I built a mirror grinding machine, found a 20 inch Pyrex mirror blank and started grinding it last week. The mirror blank I got (from a …

Suppose the mirror is 10 feet away from the laser, and the flat wall is near the laser. Very smal changes in the mirror would deflect the laser and the video frames would record what happens. it should be doable to map the mirror, detecting all errors, and then allowing an automated grinder to improve the mirror..

Page 2 of 3 - Types of grinding/polishing machines - posted in ATM, Optics and DIY Forum: Here is a pic of my spindle grinder on which I am currently rough gring a 90mm objective lens, the spindle rotates at 50rpm. ... I have been collecting parts to build a mirror grinding machine. I was thinking of an Elgin type, after reading your posts now ...

Grinding machine with driven overarm Over the summer of 2005, I modified the small grinding machine to have a driven overarm, and it is geared down from the turntable drive by about 14.5:1. This is similar to the mirror-o-matic machines, but it is built with good quality bearings and there is little slop in the machine (and none in the turntable).

Grinding machine with driven overarm Over the summer of 2005, I modified the small grinding machine to have a driven overarm, and it is geared down from the turntable drive by about 14.5:1. This is similar to …

Grinding Machine Type - posted in ATM, Optics and DIY Forum: Hy guys,Id like to realize a grinding/polishing machine with the following specifications:- max blank diameter: 400mm (16" circa)- min blank diameter: 125mm (5" circa)- capable of grinding convex and concave surfaces (lenses, mirrors, Mak correctors)Considering …

Looking for threads on mirror grinding machines. - posted in ATM, Optics and DIY Forum: I ran down a bunch of search results on this forum regarding building a mirror grinding machine and never found what I was looking for. Even the mighty Google didnt produce much results that would allow me to compare the various kinds of home …

How to grind a small mirror with grinding machine? - posted in ATM, Optics and DIY Forum: Hi, Grinding machine is generally for big mirrors above 12 with a tool on top method, different sub-diameter tool will be used.But how to grind a small mirror like 8 with a grinding machine? TOT or MOT? Ordinary, 8 mirror and smaller ones …

The usual full thickness ratio is 1:6 which means normal polishing techniques can be used on this kind of mirror. Mirrors larger than 1/6 their thickness are considered thin mirrors and will need more thoughts put into it (back of the mirror must be even and padded during polishing, used an appropriate mirror cell design, etc).

I am building a mirror grinding machine now also but will use a DC drive and PM motor that I have had lying around for 20 years. I also bought a 1/3" HP DC motor and cheap DC drive ($55) and an EBAY gearbox to run the eccentric. I'll have a 1 HP DC drive and 20:1 gearbox for the turntable and the smaller drive and 20:1 gearbox for the …

Gordon will know more about the math for different mirrors and different sizes. I recall for mine it was about a 70% tool diameter. The bucket Gordon used to …

Page 3 of 5 - Making a Mirror grinding & Polishing machine - posted in ATM, Optics and DIY Forum: You might want to try a little belt dressing for automotive belts, that can quiet belt noise if that …

Page 1 of 5 - 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 order to pay tribute to all ATM colleagues who have been sharing their knowledge publicly for common benefit. I try to get this mirror ready …