Mirror Grinding F6

Mirror-grinding of single-crystal diamond substrates with ...

The mirror-grinding was conducted as follows, regardless of whether the substrate was rotated or fixed. When the grinding wheel first touched the surface of diamond specimen, the spindle position was maintained without application of any feeding for several minutes (zero-position grinding). The grinding wheel was then fed at a certain rate up ...

Stellafane 2017-18 Mirror Class

Mirror Maker *Club Member Mirror Size Focal Ratio Start Date Mirror Status Status Date; Andy W. 8" f/6: : Polishing: : Antoine R. 8" f/5:

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SPAC Mirror Lab

Rough Grinding a Honeycomb Mirror Blank : Mike Davis has begun rough grinding another of his home made, honeycomb-back, light weight, mirror blanks. Here he is using a couple of stacked barbell wights for the tool and 60 mesh silicon carbide grit.

Telpe Mirrors Archives - Orion Optics

Telpe Mirrors. At Orion Optics UK we pride ourselves on having some of the finest optical technicians anywhere in the world. The optics we produce are world renowned for being among the best available. Each optical surface is tested up to 29 times as it passes through its many processes of being turned from a blank piece of glass to a ...

Stellafane 2005-06 Mirror Class

Completed mirrors include Cody's 6" f7.8, Glenn's 10" f5.1, Andy's 8" f5.4, Wayne's 10" f5.6, Dave's 8" f6.25, Fran's 8" f6, and Erin's 4.25" f4.5. Facilities were much less of an issue this year thanks to the hard work of Ken Slater, Tom Gorka, and Dave Prowten. The Bunkhouse, while certainly primitive, provides a good grinding and pitch lap ...

3mirrors ALUMINUM Tungsten Electrode Sharpener Grinder TIG ...

3mirrors ALUMINUM Tungsten Electrode Sharpener Grinder TIG Welding Rotary Tool w/Flat Grinding Block, Cut-Off Slot, Multi-Angle & Offsets, 4 Screw Holes, 5 Double Sided Grind Wheels, 2 CNC Mandrels - - Amazon

INDUSTRIAL CATALOG - Radiac Abrasives

F6 Friable White 14ss F8 ... Used in grinding of tungsten carbide, cast iron, aluminum, ... 10 .0001 Mirror Finish 220 .0026 .003 - .005 5 - 6 .0001 Mirror Finish Grade Hardness If you need: Change Grade by: Cooler or Freer Cutting Action 1 or 2 letter grades softer Longer Life 1 or 2 letter grades harder ...

Making a 250mm f6.4 parabolic mirror.

Making a 250mm f6.4 parabolic mirror. 1: Preparations. First things first: this section lists some initial things to do, such as purchase the raw materials and cut out a glass disk. ... I think in the meanwhile i will try to make a set of 1:10 pulleys for a V-belt. I've also started constuction of a grinding bench. The top surface is a circular ...

Building a fixed post mirror grinding machine - Page 2 ...

Re: Building a fixed post mirror grinding machine. Update summary: Lots of work to get to this point. Things I need to probably change or fix: My gearing of the DC motor. I will need a slow speed for polishing (5 rpm), and faster speeds for hogging out and fine grinding (15- 30 rpm), so likely need to think about adding a gear reduction.

Stellafane ATM: Mirror Making Overview

Mirror Grinding at the Spring 1998 Stellafane Mirror Workshop in the McGregor Observatory Rough Grinding. The purpose of rough grinding is to start to cut a spherical concave surface into the mirror blank. For a 6" mirror with a 48" focal length, the depth of the curve is 0.047". A full sized tool is rubbed against the mirror blank, with a wet ...

Canada-wide Astronomy Buy & Sell

8" Newport Mirror grinding kit 8" Newport pyrex mirror grinding kit Includes: - machine ground pyrex blank for f6 - grinding materials - grinding tool - 1/10 secondary mirror: Price: $150 Posted on: 16:36:43 Last Updated on: 16:37:29 Contact: florin (user details & view my other ads) Phone Number (optional): Not provided

ATM (Amature Telpe Making) - Dr. Debug

8" F6 Project. CONSTRUCTION DETAILS: Mirror Coating. The Tube. Spider Assembly. Rocker Box. Tube Rings. Mirror Cell. Finishing Touches. Throughout this site click on any image for a larger picture. The entire project of building the mirror-o-matic, grinding and polishing the mirror, an building the telpe took a little over a year to ...

Amateur Telpe Making - Allarscopes

The first design was a 150 mm F4 Newtonian (diameter of the main mirror 150 mm with the F-ratio 4). However, I was told that a F4 mirror is not very easy to make especially if you are grinding your first one. Therefore I decided to make a F6 mirror instead of F4.

Build your own telpe part 1: The mirror – Thomas ...

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 telpe (e.g. F/D = 4) well suited for deep sky observations. On the opposite, a shallow mirror (e.g. F/D = 8) will be performing very well on planets and the moon.

Mirror-O-Matic - Dr. Debug

While I was in the construction process of the Mirror-O-Matic I had ordered a 10" an 8" plate glass kit. Here is the 10" ready for fine grinding. The only part I could not find locally was the toggle pad used in the overarm assembly. This part I ordered from Reid Tool Supply Company. The 8" came at a later time then the 10".

Mirror grinding - scope making

That would make a 150 mm F8, or a 200 mm F6 mirror. First phase : rough grinding (or hogging out) In this stage of grinding we want to dig out the flat glass blank, in other words, create a saggita. Saggita is a section of a sphere, its radius of curvature (ROC) is TWICE as long as the focal length of the mirror.

Stellafane ATM Main Page

Grinding a Mirror "For it is true that astronomy, from a popular standpoint, is handicapped by the inability of the average workman to own an expensive astronomical telpe. It is also true that if an amateur starts out to build a telpe just for fun he will find, before his labors are over, that he has become seriously interested in the ...

Reflector Telpe Mirrors for sale - eBay

203mm Parabolic Mirror Lens for Newtonian Reflection Telpe Primary Mirror. $370.09 to $397.10. Was: $397.95. $29.99 shipping. ASTROSCAN EDMUND SCIENTIFIC CO. BARRINGTON N.J. AS IS/TELPE WITH STAND. $200.00. $65.00 shipping. or Best Offer.

Good mage setup for grinding f6 ???(no f7 completion ...

Good mage setup for grinding f6 ???(no f7 completion) Thread starter Kuuvsi; Start date 50 minutes ago . Kuuvsi Active Member. Kuuvsi. Taken TAKEN Elite Joined Mar 24, 2019 Messages 46 Reaction score 26. 50 minutes ago #1 im currently berserk but i want to switch to mage but I don't know what weapons and gear to get. pls help. ...

Mirror grinding book recommendations ... - Stargazers Lounge

Could anybody recommend a book on mirror grinding and figuring that is easy to buy in the UK and easy to follow. I'm after a default recommended text just like Making Every Photon Count is the recommended text for AP. ... you should do a nice 12" f6.

Ed Grinds a Mirror - scopereviews

Mirror grinding is a noisy, messy, wet activity. It doesn't take up enough of your attention to fully occupy you, but it does take up just enough that you cannot do something else like watch TV, listen to the radio, etc. You're pretty much stuck there looking at your hands, and adding water or grit once in a while. ...

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Mirror Blank for Grinding, 18in f/4 - Reflectors - Cloudy ...

Mirror Blank for Grinding, 18in f/4 - posted in Reflectors: What is recommended for a glass mirror blank for mirror grinding? I am not in the position where I can spend large sums of money for a premade blank. Are there any kinds of alternatives to …

Star Testing a Telpe - BBAstroDesigns

Different optical tests are needed at different times in the mirror making process: grinding, polishing, parabolizing and final evaluation. ... For a F6 telpe, this means a 12mm eyepiece. High powers make star testing issues more obvious. The highest power you are going to use with the telpe is best. If you cannot see a star test issue ...

Polishing mirror | Physics Forums

I have been working on making a pair of matched 200mm f6 primary mirrors. I have been using Texereau as a guide. I think I have finished fine grinding. I would like to find someone near middle Tennessee to look at my work and offer advice, especially as I begin polishing. Any Ideas?

Building a fixed post mirror grinding machine ...

Re: Building a fixed post mirror grinding machine. I I had a nice piece of 3/4" stainless dowel that was begging to be used. So I bought a cheap pillow block to provide the locator for the metal dowel, and then drilled the overarm to fit. These pillow blocks are $8 and come complete with a locking collar - great deal.

Parabolic telpe mirrors - R.F. Royce

My mirrors are made to the following design and use specifications. Wavefront accuracy having an RMS of .032 and a Strehl Ratio of .96 or better at 633 nm for apertures up to 10" at f/5 or larger.Mirrors up to 16" and f/5 or larger have a wavefront accuracy having an RMS of .036 and a Strehl Ratio of .94.. Mirrors at f/4.5 and lower ratios have correspondingly lower Strehls due to …

Newbie! Started playing yesterday, i saw the ad on fb for ...

Which other charas should i lvl for grinding and mirror deploys? Close. Vote. Posted by 5 minutes ago. Newbie! Started playing yesterday, i saw the ad on fb for first free draw so i got this UR and SSR, next is my current roster, am i on the right track? Which other charas should i lvl for grinding and mirror deploys? 1/3. 0 comments. share.

Making a 25 inch F2.6 mirror - BBAstroDesigns

A lightweight mirror makes the work of grinding, polishing and parabolizing so much easier. Astigmatism is not an issue for such a large fast mirror. A simple mirror cell suffices (9 point where each point supports a 2 inch diameter pad back support, 2 …