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For hogging out, we start with the quot;chordal strokequot; Put the tool on the bottom, add half a teaspoon of #80 grit, sprinkle with water and place the mirror center near the edge of the tool. Use 1/3 mirror diameter strokes. This means that stroke is 1/3 length in total, 1/6 forward, 1/6th backwards.
Mirror making is a process: 1. Get blank, grit, pitch 2. Roughly grind a curve in the mirror face 3. Refine the curve with diminishing grit sizes 4. Polish the mirror face 5. Parabolize the mirror face 6. Send off to aluminizing. Trust the process: following the process will lead you to a finished mirror. Test the mirror to verify the process. Make the mirror you want.
tut44 Making A Mirror Grinding Tool Asterism. After fine grinding is complete, the mirror must be polished. It is during polishing that you figure the mirror by using a different polishing stroke to change the mirrors spherical polished shape into a parabolic polished shape . See a related tutorial nearby. File Size: 387KB; Joy of
31 #0183;#32;The center will deepen during the first stage of fine grinding as contact is achieved across the
This is the beginning of mirror making wisdom. Wisdom in mirror making is not learned; it is absorbed by constant observation and thought over a long period of time. Luckily for the first time mirror maker, the joy of taking the first step is as powerful as the satisfaction of an experienced mirror maker finishing a difficult mirror.
The Joy of Mirror Making Mel Bartels. Introduction Rough Grinding Fine Grinding Polishing
The polishing stage of mirror making accomplishes two things. First, it smooths the surface so that light can pass through or be reflected without scattering to form a clear, sharp image. Second, the surface is then changed (or figured) to match an ideal curve to further sharpen the image.
The goal of polishing is simple: polish out all the tiny pits that remain from fine grinding, ending with a smooth spherical mirror surface ready to parabolize. You will use a laser pointer to look for any remaining pits and a Ronchi tester to look for a smooth mirror profile.
Joy of Mirror Making: Fine Grinding. Grinding also proceeds quicker because the tool spends more time working the mirror''s edge, where most of the glass is located and where pits tend to grind out last. Tool on top tends to lengthen the radius of curvature while mirror on top tends to shorten the radius of curvature. learn more
making a mirror grinding machine . Second Hand Concrete Batching Plants For Sale In Malaysia. Market of Second Hand Concrete Batching Plants For Sale In MalaysiaDevelopment of Second Hand Concrete Batching Plants are to largescale, automated,
Fine Grinding 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 coarse grit
Grit and water are applied to the mirror, which is on the barrel face up. The tool is placed over the mirror and pressure is applied over edge of tool as it passes over center of mirror. Use 60 grit if it is a large mirror, 80 grit if it is a smaller mirror. Walk around the barrel as you do this.
Mar 16, 2015#0183;#32;Page 4 of 5 Making a Mirror grinding amp; Polishing machine posted in ATM, Optics and DIY Forum: put the mirror against your laptop, look thru the sunglasses, spin the sunglasses, it should darken the mirror. what do you see when the mirror goes dark? very simple very easy test. + helps to be in a darkened room, and the screen showing white.
Polishing a mirror is one of the great joys you will experience as a maker and fine grinding, ending with a smooth spherical mirror surface ready to parabolize. [Contact Now] Stellafane ATM: Rough Grinding
Apr 12, 2020#0183;#32;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.
MirroroMatic Operations Manual Revised 2 May, 2002. MirroroMatic will take most of the manual labor (some call this drudgery, some call it joy) out of mirror the mirror is rotated on a turntable, it will have a very nice figure of revolution. The chance of producing a severely astigmatic mirror is greatly reduced.
For hand grinding, the coarse grit sequence of 40, 60, 80, 120, 220 is typical (start at the grit size appropriate for your mirror diameter as given in the section above). Silicon Carbide is used almost exclusively. Fine grit sequences vary more, and are often adjusted based on the supplies at hand.
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