Grinding Mirror Fine
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.
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Surface figure control in fine rotation grinding process ...
With the rapid development of high-energy laser system, thick silicon mirror, as an important optical component to reflect laser, is required to have a surface with micron-level flatness, which poses significant challenges to silicon mirror manufacture process. Fine rotation grinding (FRG) is a typical efficient method for silicon mirror manufacture. A geometric model …
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Joy of Mirror Making: Rough Grinding - BBAstroDesigns
31 Grinding the curve into the mirror face can be done by one of the following approaches: …
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Grinding mirror using CNC router - Page 3 - ATM, Optics ...
I ran another round with much gentler stepovers of 0.5mm. Took 40 minutes. So in total, CNC grinding took 40 minutes for rough girding and 40 minutes for fine grinding. Next step is to grind the real pyrex blank. Not sure about …
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How to Grind a Telpe Mirror in 10 Easy Steps – Starry Nova
Fine grinding is well known for its long process of grinding. But if you do it correctly, it might just take you a fraction of time. In all phases listed, fine grinding is the most manageable task in large mirror making.
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Fine and Intermediate Grinding of Your Mirror | Guy's Math ...
Grinding, Grit, Mirror. 3. Grinding (intermediate and fine): Once you have reached your goal for the sagitta, and inspected it, then it's time to move on to the next smaller grit size and to a more conventional grinding technique. First of all, throw away all of the used newspaper, rinse out the water bucket, wipe off and put away the grit ...
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FINE GRINDING THE MIRROR - sidewalkastronomers.us
FINE GRINDING THE MIRROR. After generating the mirror curve by rough grinding it remains for us to smooth it by fine grinding and polishing before finally correcting it to a parabola of revolution. Fine grinding is done in about the same way as the last wets of rough grinding, but with a series of finer and finer grits such as 100, 220, 320 ...
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Can you use a grinder on glass? – TheKnowledgeBurrow
Cutting a Mirror with an Angle Grinder. You can cut a mirror with an angle grinder if that contains a diamond wheel. ... Dust from whiting compound, or the fine particles of glass from grinding can be inhaled. When you clean up glass dust, or whenever you work with whiting, you should wear a dust mask.
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Mirror Finish | Norton Abrasives
The fine grade silicon carbide abrasive and nylon fibres in grade 2SF (soft & semi-conformable), or in grade 3SF(slightly harder & more durable) imparts a finer / brighter finish. By the end of this process, you should have a smooth, bright satin finish – taking the time to remove imperfections at this stage in mirror finishing will make your final polishing step quicker and …
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grinding mirror fine
grinding mirror fine Mirror Making During fine grinding these chips will make little scratches. The scratches won't hurt the performance of the mirror but some people are perfectionists. To avoid the scratches keep the mirror edge dull with alumina sandpaper and a bloc
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Grinding mirror using CNC router - ATM, Optics and DIY ...
I guess I will have to do fine grinding, but I won't have an appropriate grinding tool because I skipped rough grinding. Yep, your guess is correct. If you already have the tool piece..6" glass... best to just grind like most ATM'ers and have the fitting tool to take you through the rest of the mirror fab.
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K.O. B603 Grinder - Help me not make a purchase mistake!
Can I get a decent surface grind (mirror finish) out of it on a 3" flat part? I don't mind if its a little more effort, or has a little less height adjustment accuracy than a proper 2 ton machine. I'd likely use it to just pretty up surfaces that have been milled to …
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grinding mirror grinding - natascha-fotografie.nl
Mirror Grinding Machine. My Mirror Grinding Machine. For a long time I've wanted to build a machine for grinding telpe mirrors. Dennis Rech's M-o-M designs finally inspired me to just get up and do it. Over the years, I'd …
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Stellafane ATM: Mirror Making Overview
Mirror grinding and figuring consists of four major steps (plus aluminizing). Rough and Fine grinding use hard tools (glass, tile or metal) and harder then glass abrasive grit (Silicon Carbide or Aluminum Oxide). Polishing and Figuring use a soft pitch tool and ultra fine abrasive (Cerium Oxide or Rouge).
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Fine Grinding a 20" Quartz Telpe Mirror - YouTube
Gordon Waite shows some steps during fine grinding of the 20" mirror. As the grind progresses through the grades of abrasives, see the technique Gordon uses...
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Telpe Mirror Making: Part 3, Rough Grinding ...
12 inch f4.9 Telpe Mirror Part 3. 16:50. The 12 mirror is taken through the rest of fine grinding, going through 12-micron, 9-micron and 5-micron stages. Gordon shows how to do maintenance on the ceramic tile/dental plaster grinding tool. He demonstrates methods for deepening the mirror faster.
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Mirror grinding - scope making
Add the usual half teaspoon of grit, sprinkle with water and grind for a couple of minutes, rotating tool and mirror often. Rinse the mirror and inspect the grid lines. If the grid is worn out evenly, you are doing fine. If you grinded with TOT, the edges will be more worn than the center, and vice versa if MOT. This is okay.
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Waite Research :: 15" F4.5 Telpe Mirror
After fine grinding, the mirror was rough polished on the fixed-post machine using a pitch polisher. The Ronchigrams in the photo area show the progress of the mirror from rough polishing through figuring. After the mirror is finished up, I use a diamond stylus to engrave my name, the focal length and the date on the back of the optic.
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Basics of Mirror Grinding
The initial rough grinding process uses grit sizes of 60, 120, and 180 to carve out the basic spherical cavity. The mirror is then fine ground with grits of sizes ranging from 220-900. In both grinding processes, the grit is harder than the mirror blank and tool, resulting in a concave mirror and complementary convex tool.
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Grind and Polish a Dobsonian/Newtonian Telpe Mirror ...
Now, you'll use the normal stroke as in fine grinding and polishing agent to get the surface of your mirror super smooth. It's best to do these sessions in at least 1ish hour increments - the polish works better after 10-15 min of warming up from the first strokes and the pitch really conforms best after a bit of friction.
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TELPE MIRROR MAKING HOW TO: Fine Grinding - YouTube
In this video I am showing you how to make a DIY telpe mirror! This is the second part in the series, showing fine grinding in a step by step tutorial.
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How is the mirror polishing finish done on stainless steel ...
The mirror finish is achieved by mechanically treating the surface with a series of gradually refined abrasive materials. At this stage, the deep scratches must be removed because any surface defects on the final product are very noticeable. After this, the final process involves polishing the surface for 5-10 minutes to form a mirror-like ...
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Joy of Mirror Making: Fine Grinding - BBAstroDesigns
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 …
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CN108568723A - Mirrors fine-grinding and polishing device ...
The invention belongs to eyeglass burnishing device technical fields, more particularly to a kind of mirrors fine-grinding and polishing device, including lathe bed, the front of lathe bed upper surface is equipped with grinding chamber, the rear portion of lathe bed upper surface is fixedly installed mounting base, and fine-grinding and polishing processing is carried out to …
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Mirror Grinding Machine | Hackaday
Grinding and polishing your own mirrors is a long, arduous process. Instead of lapping the blank by hand, Laurie Hall built this mirror grinding machine from scratch.
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