mirror grinding tool

Thetoolmarks often appear due to the poor cutting ability of thegrindingwheel duringmirror grinding, which reflect the uneven surface of the workpiece, so no-feed smoothgrinding…

31 rows·Grindingthe curve into themirrorface can be done by one of the following approaches: …

The surface roughness of the workpiece aftergrindingis Ra <0.01 m, and the image can be clearly imaged under light such asmirror, so it is calledmirror grinding. The flatness of the ground surface shall not be greater than 3 m / 1000mm. The surface processing of high-precision and high-value-added parts requiresmirror grinding.

MyMirror GrindingMachine. For a long time I've wanted to build a machine forgrindingtelescopemirrors. Dennis Rech's M-o-M designs finally inspired me to just get up and do it. Over the years, I'd been collecting motors, gear boxes, pulleys, etc. Most of them came from industrial junk yards.

Mirror grindingand figuring consists of four major steps (plus aluminizing). Rough and Finegrindinguse hardtools(glass, tile or metal) and harder then glass abrasive grit (Silicon Carbide or Aluminum Oxide). Polishing and Figuring use a soft pitchtooland ultra fine abrasive (Cerium Oxide or Rouge).

Just reverseMirrorandToolin the description below if you are working withToolon Top) Carefully place themirroron thetoolso they are concentric. Pull themirrorstraight back towards you until it is overhanging 1/6 of themirrordiameter.

Benefits of using thin plate glassmirror blanks? There are several advantages to using thin plate glassmirror blanksforgrindingyourtelescope mirror: * Thinmirror blanksare less expensive, allowing more people to afford the hobby ofgrindingtheir owntelescope mirror. * Choosing a thinmirrorblank gets you more aperture for your dollar.

Forgrindingthe back of my 12"mirror, I used an 8" disk of 3/4" particle board, glued tiles to the front with epoxy, and coated the back and sides with polyurethane. It worked great. I made my ;polishing toolfor my 12"mirrorout of three layers of 3/4" particle board glued together. I used a chisel and a belt sander to put a curve on the front approximately matching the curve of the mirror.

Because of its extreme hardness,silicon carbideis ideal forgrinding Pyrex, which is harder than ordinary glass, or very deep curve generation used for refractor, Maksutov, or richest field objectives. The very coarse sizes (40 and 60) are used for diameters larger than six inches or deep curves where a large amount of glass must be removed.

For large thin mirrors, say 12 inches [30cm] or greater and 1.5 inches [4cm] or thinner, the mirror back must be ground flat, or at least regular in shape before beginning fine grinding the mirror's face. Cast a tool specifically for the mirror's back, and grind with 220 grit, inspecting for low unground spots. Grind until they disappear.

Jul 08, 2012· If you want to save time hogging out the curve, use a ring tool, such as a piece of pipe 1/2 the diameter of the mirror. You can hog with the full size tool, but it takes twice as long and is laborious. If you use the ring tool, pour your tile tool after hogging the curve, directly against the mirror.

Mar 06, 2006· The larger one is forgrindingand polishingmirrorsand is also used at higher speeds to centrifugally cast resinmirrors, an experiment I am playing with in my spare (sic!) time. The smallermirroris used for power wrapping epoxy impregnated fiberglass around mandrels for making tubes and cylindrical components for open trusses.

P240 --- Used for metal and nonmetal surface deburring,grindingand polishing; also for nonmetal such as wooden door surface linear finish. P320 --- Wheel will leave a "mirrorlike" finish on a variety of metals.

Method of mirror grinding. 1. Balance and dressing grinding wheel. 1) Balance the grinding wheel. After the grinding wheel is installed with the flange, the first static balance is performed, and then the end face and outer circle are trimmed on the grinding wheel shaft and then the precise static balance is performed. (2) Dressing the grinding wheel.

Still grinding your own mirror is a key skill that makes you a real telescope maker. To grind a telescope mirror by hand you simply attach a glass tool the same size as your mirror blank to the top of a small, strong stand. You apply grinding compounds to the tool and place the mirror blank on top.

The M-o-M is a marvellous machine due to its simplicity and yet refined design. It is extremely flexible accommodating mirror sizes from 4 inch up to 20 inch (with slight modifications) and can be used for all three steps necessary in producing a mirror. That is you can use it to grind, polish and figure your optics.

Dec 15, 2000· As all ATMs soon discover, there are many different ways to do each of the tasks required for grinding your own mirror. Making a grinding tool is no different. For smaller mirrors up to about 10 inches diameter, using a solid glass tool often works out best -- especially for the beginner.

Mirror grindingmachine … Mark's Notes for the Amateur Telescope Maker. Mark's Notes for the Amateur … Brown & Sharpe No. 13, Universal andTool GrindingMachine. Asset Description Notes: Brown & Sharpe No. 13, Universal andTool GrindingMachine.Grindingcapacity 8"x24", Table 4-1/4" x 41-1/2", Diameter Swing – Maximum 8".

You can use a tool 75% of the mirror diameter without much difficulty. Tools smaller than 75% have less tendency to produce a spherical curve during fine grinding. Although a 16" tool works well with a 16" mirror, for larger mirrors I would recommend a smaller tool …

diameter, 2 inch thick annealed pyrex blank for the primary mirror. I rough ground the f/4 curve using standard grinding techniques on a full size tool made out of porcelain tiles epoxied onto a form made of cement. After roughing in the curve, I trepanned a 2.5 inch diameter core from

MIRROR GRINDINGMACHINE. I made my firstmirror grindingand polishing machine over thirty years ago. It used the working principle of the machine illustrated at "A" Fig.3, Page 163, "Amateur Telescope Making" Book 1. A bowl which rotated was fitted to the spindle.

The optical tester is a device which shines a slit of light onto the mirror and finds the focus point of each area of the mirror. It is essentially an X-Y table with a 1/1000th of an inch accuracy in the X dimension. First Construct the base, Construct the middle layer,

A Wide Variety of Doctors' Tools. This doctor play toys kit comes with everything your kid need, such as: Stethoscope*1, Toll*1, Medicine bottle*4, Dental mirror*1, Grinding machine*1, Dental mirror*1, Small spoon*1, knife*1, Syringe*1, Microscope*1, Scissors*2, Thermometer*1, Tweezers*2, Disease plate*1. Which attract kids attention for hours, and keeps them create hours of fun playtime.

Nov 15, 2001· For thismirror, I skipped the pre-polish step and simply used pads and CeO for initial polish. I used five pads on the 9"grinding toolduring the polishing phase. A photograph of thetoolappears in Figure 1 at left. (Thistoolwas made in my usual …

MIRROR GRINDINGMACHINE. I made my firstmirror grindingand polishing machine over thirty years ago. It used the working principle of the machine illustrated at "A" Fig.3, Page 163, "Amateur Telescope Making" Book 1. A bowl which rotated was fitted to the spindle.

Thetoolshould be a couple of inches smaller than the primarymirror(ex. 6"toolfor 10" primary). To facilitate thegrindingwe may pin thetoolglass between three furring nails near the end of a patio bench and sit astride the bench while we work. The procedure is simple.

Othertoolsused for hogging out also can be a metal ring or pipe flange. For mygrinding toolI used Portland cement. This was readily available an cheap. For the 8"mirrorI made a sub-diametertool. Thetoolsize ended up being 6.25" in diameter. This came out to be 78% the size of the glass I …

Oct 01, 2016· Increasingtoolposture angle decreases the grain cutting depth to the critical cutting depth from brittle cutting to ductile cutting, but it increases the risk oftoolinterference. Themirrorfreeformgrindingmay be parameterized by material behavior,toolsize and posture,grindingconditions and abrasivetoolperformance.

Thistoolis called a pitch lap. It is made the same way as the pennytoolyou made to do the finegrindingexcept instead of pennies you will use "Pitch". [Fig 6] Here is a photo that shows thetoolbeing pressed against the warmed pitch. It is resting on mymirrorwith aluminum foil between thetoolandmirror…

Cleanedmirror, platter andtool, driedmirrorand check with low angle light. No Pits visible. Very uniform surface under 7 power loupe. Aug 5, 2003 I was off to the Nova East Starparty for the weekend, a good turnout but lousy weather. We were rained out for 3 days. :-( Started on the 12micron grit today.

eSX 300 5-Axis lensGrindingmachine: 5-300 mm Optics eSX 400 5-Axis LensGrindingMachine: 5-400 mm Optics SXL 500 5-Axis LensGrindingmachine: 10-500 mm Optics

Aug 30, 2017· While making amirrorrequires a precise silvering process, you can make glass look like amirrorwith spray paint you can find at craft stores. Spray paint can create a glossy, reflective surface that gives the effect of amirror. Use this technique for easy, inexpensive craft projects at home.

The usual way to handle this is to heat the pitch in a small used coffee can and pour it onto yourmirrorortool. But theGrindingGuy has other ideas, and his solution is simple and elegant. I wrap mytoolwith 2" wide masking tape, making a small reservoir for the pitch, which was crushed to pieces with a hammer.

US20010004581A1 US09/737,466 US73746600A US2001004581A1 US 20010004581 A1 US20010004581 A1 US 20010004581A1 US 73746600 A US73746600 A US 73746600A US 2001004581 A1 US2001004581 A1 US 2001004581A1 Authority US United States Prior art keywordstoolnegative mould mass abrasive grains hard Prior art date 1999-12-20 Legal status (The legal status is an …

To place themirroron thetool, the center of themirrorshould first contact the edge of thetool. Do not touch the edge of themirrorto thetoolever, otherwise you will chip themirror. Whengrindingeach side of themirror, do not go too far over one side, or not far enough. Go a little bit, but not a lot off center.