joy of mirror making rough grinding
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joy of mirror making rough grinding

Joy of Mirror Making: Rough Grinding - BBAstroDesigns

31 行  2020-5-19  Here is a 25 inch [635cm] mirror being rough ground followed by a beautiful grinding stand from the Delmarva Mirror Making Seminar. Grinding Tools To construct a grinding tool, attach unglazed ceramic tiles, 1 inch [2.5cm] square, to one of these substrates:

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Joy of Mirror Making: Fine Grinding - BBAstroDesigns

2017-4-4  The goals of fine grinding are to prepare the curved mirror face so that it is ready for polishing and figuring and make any adjustments of the focal length. Previously in rough grinding we deepened the center of the mirror's face either by grinding with

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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 ...

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Mirror grinding - scope making

2007-2-13  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

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Grinding,Polishing and Figuring - Part 2 - Polishing

2014-7-21  Polishing is the stage of mirror making that requires the most physical work, even more than rough grinding. What probably concerns you most is how much time it will take you to polish the mirror. Using the techniques described below, a 16" porthole takes about 10 hours to polish out with a full lap.

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Ed Grinds a Mirror - scopereviews

2002-1-25  -Ed 5/29/00) Chapter One: Rough Grinding, May 28, 2000 I arrived on a cool Sunday afternoon in May, and started grinding with five other club members in a local barn. Right away, there was pressure on me; I had missed the first two-hour grinding session and everyone was well ahead of me on the coarse (80) grit.

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Stellafane Links Page

Rough Grinding in the great outdoors at the Stellafane Mirror Class (October 2002 Stellafane Mirror Class) Telescope Making Workshops and Seminars. Links to World Wide Mirror Class Listings. Link to the Stellafane Mirror Class. Astronomy

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How I built an edge grinder for telescope mirror blanks.

2013-2-26  Here is a photo of the grinder in operation actually edging a 12.5 inch blank I cast in my kiln. It works! The blank is attached to the 12 inch diameter wood disk with industrial strength, adhesive-backed Velcro. The rough grinding drum very quickly got

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Mirror grinding tile tool - ATM, Optics and DIY Forum ...

2012-7-8  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 f/8 parabola)?

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Surface Roughness Produced by Different Manufacturing

2009-6-30  Surface Roughness Produced by Different Manufacturing Process. Knowing what manufacturing process can produce surface finishes that desired on a surface can be an added advantage while making the designs. Here is a table showing maximum and minimum Ra values can produced on each production methods. Elect. Discharge Machining. Perm. Mold Casting.

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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 ...

Read More
Rough Grinding of a Telescope Mirror Guy's Math

2014-12-15  The ground-up glass and grit will make a muddy slurry, which will eventually slow down the grinding process. C. Try not to wrap your hands around the edge of the mirror towards the edge, if at all possible. This will heat up the edge of the mirror, making it

Read More
Mirror grinding - scope making

2007-2-13  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

Read More
Build your own telescope 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 telescope (e.g. F/D = 4) well suited for deep sky observations. On the opposite, a

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Ed Grinds a Mirror - scopereviews

2002-1-25  -Ed 5/29/00) Chapter One: Rough Grinding, May 28, 2000 I arrived on a cool Sunday afternoon in May, and started grinding with five other club members in a local barn. Right away, there was pressure on me; I had missed the first two-hour grinding session and everyone was well ahead of me on the coarse (80) grit.

Read More
Grinding,Polishing and Figuring - Part 2 - Polishing

2014-7-21  Polishing is the stage of mirror making that requires the most physical work, even more than rough grinding. What probably concerns you most is how much time it will take you to polish the mirror. Using the techniques described below, a 16" porthole takes about 10 hours to polish out with a full lap.

Read More
How I built an edge grinder for telescope mirror blanks.

2013-2-26  Here is a photo of the grinder in operation actually edging a 12.5 inch blank I cast in my kiln. It works! The blank is attached to the 12 inch diameter wood disk with industrial strength, adhesive-backed Velcro. The rough grinding drum very quickly got

Read More
Mirror grinding tile tool - ATM, Optics and DIY Forum ...

2012-7-8  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 f/8 parabola)?

Read More
Surface Roughness Produced by Different Manufacturing

2009-6-30  Surface Roughness Produced by Different Manufacturing Process. Knowing what manufacturing process can produce surface finishes that desired on a surface can be an added advantage while making the designs. Here is a table showing maximum and minimum Ra values can produced on each production methods. Elect. Discharge Machining. Perm. Mold Casting.

Read More
Telescope Mirror Blanks - Amateur Telescope Making

Telescope mirror blanks for amateur telescope makers. We have a variety of low thermal expansion borosilicate glass blanks for making a high quality telescope mirror to your own specifications. View as Grid List. 8 Items . Show. per page. Sort By. Set Descending Direction. 4.25

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Rough Grinding of a Telescope Mirror Guy's Math

2014-12-15  The ground-up glass and grit will make a muddy slurry, which will eventually slow down the grinding process. C. Try not to wrap your hands around the edge of the mirror towards the edge, if at all possible. This will heat up the edge of the mirror, making it

Read More
Mirror grinding tile tool - ATM, Optics and DIY Forum ...

2012-7-8  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 f/8 parabola)?

Read More
Homemade Telescope Making - Google Search

Mirror making for beginners . Joy of Mirror Making by Mel Bartels. Large thin mirror making by Mel Bartels A number of the techniques I used to make the 14.5 inch mirror came from this website. It was very helpful. Here are some other large mirror making sites you might find helpful: Making a Large Mirror - Part I. Making a Large Mirror - Part II

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Metallographic grinding and polishing insight Struers

Fine grinding produces a surface with little deformation that can easily be removed during polishing. Because of the drawbacks with grinding papers, alternative fine grinding composite surfaces are available, in order to improve and facilitate fine grinding, A

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Surface Roughness Produced by Different Manufacturing

2009-6-30  Surface Roughness Produced by Different Manufacturing Process. Knowing what manufacturing process can produce surface finishes that desired on a surface can be an added advantage while making the designs. Here is a table showing maximum and minimum Ra values can produced on each production methods. Elect. Discharge Machining. Perm. Mold Casting.

Read More
Telescope Mirror Blanks / TelescopeMirrorBlanks.Com ...

2016-9-14  Telescope Mirror Blanks Providing telescope mirror blanks and kits to telescope makers. Mirror blanks are individually tested for internal strain. Plastic protractor inserted under a 6 inch mirror blank during a stress test, to illustrate what

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Telescope Mirror Blanks - Amateur Telescope Making

Telescope mirror blanks for amateur telescope makers. We have a variety of low thermal expansion borosilicate glass blanks for making a high quality telescope mirror to your own specifications. View as Grid List. 8 Items . Show. per page. Sort By. Set Descending Direction. 4.25

Read More
Foucault test - Telescope Optics

2021-10-4  FIGURE 53: Geometry of the Foucault test in determining how close is mirror surface to that of a paraboloid.Unlike sphere (blue), where normal to the surface at any zonal height leads to the same point - the center of curvature - thus every zone focuses point-object placed at the center of curvature back onto itself, paraboloid (red) flattens out toward the edge, with the surface normals ...

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Best Power Tools Guide. Air, Electric and Cordless Power ...

2021-11-22  Reciprocating Saws. The working principle of a reciprocating saw is very similar to a jigsaw. Both the power tools are equipped with reciprocating blades that move in and out to cut the material. However, they are used for different purpose. While a jigsaw is a craftsman tool to accurately cut various shapes, a reciprocating saw is a heavy-duty ...

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Chick Has Orgasm on LIVE TV with Joy Behar - TMZ

2013-2-21  Mute/Unmute m. Seek % 0-9. Live. 00:04. 01:34. 01:38. Chick Has Orgasm on LIVE TV with Joy Behar. Tyga Throws Birthday Party with Snow, Snowboarding and Tequilla. 'Who Killed Malcolm X' Producer ...

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