Because the tradition grinding is not suitable for large aspheric mirror surface, in this paper, a grate parallel grinding in 3axis and an onmachine measurement system are applied.
On top of the grinding tool, I loaded up 50 pounds of weights to help speed up the grinding process. This is where a beefy machine is needed. The 2" thick mirror weighs in at about 65 pounds. Add on 50 pounds of grinding weights, and you have 115 pounds spinning on the turntable.
The Design and Manufacture of a Large CNC Grinding Machine for OffAxis Mirror Segments. ... West Virginia. The Green Bank Telescope (GBT) 1 will be the world's largest fully steerable telescope ...
China Surface Grinding Machine manufacturers Select 2021 high quality Surface Grinding Machine products in best price from certified Chinese Machine Tool, Milling Machine suppliers, wholesalers and factory on Made in SM 464 Super Finisher, 8 Station Stone Guides, 31 Long Taper Rollers, Stand Alone Electrical.
Jan 01, 2011 · To minimise the moving masses, machine motions are achieved using three fundamental axes. Two stacked hydrostatic linear axes (x, z) holding the inclined hydrostatic grinding spindle and a single hydrostatic rotary spindle (c) supporting the workpiece. Download : Download fullsize image; Fig. 4. BoX machine.
Apr 30, 2021 · Wooden Telescope Part 1: the Mirror : 14 Steps (with Some amateurs actually use grinding machines to cut most of the grinding and polishing time Figuring is actually the most sensitive part Machines can achieve a good result for longer focal ratio (f/6, f/8, etc) but hand figuring is probably still the best option, especially for faster mirrors.
Oct 05, 2001 · Karl Kanalz, W8TIF gave his insight and experience on the topic of crystal grinding and has graciously consented to it being reprinted here. Crystal Grinding by Karl Kanalz, W8TIF. I may be an "OF" (Old Fellow), but I do know a bit about grinding crystals, .
Sep 22, 2015 · One of the showroom presentations featured the new Studer S151 universal internal cylindrical grinding machine for largediameter components. This machine line offers a swing above table of inches and is available in versions that can accept part lengths of inches or inches. It features the company's StuderGuide technology that ...
Aug 25, 2006 · Grinding a lens is more difficult but uses the same principles. 20th century techniques use a grinding machine to get the spheroid and turn the spheroid into aspheroid by hand in the final "figuring" stage. The hand work is what makes them more expensive than a machine made aspheroid surface.
Feb 15, 2012 · If you. paid somebody 1520 an hour, it could easy go over 10K. There's a. reason industry just scraps an old machine. Karl. Re: How much should a lathe rebuild cost, approximately. Ignoramus10095. 2/14/12 6:24 PM. Karl, as you know, I trust and respect you, but I wonder why a rebuild.
Throughout the grinding and final lapping stages, the objective has been to reduce pits and scratches to the smallest possible size. However, no amount of grinding can produce a surface smooth enough or sufficiently transparent to meet the needs of a firstclass telescope objective. Different techniques are .
MirrorOMatic grinding machine. When I decided in 2009 after a tenyear break to get into mirror making again, it quickly became clear to me that I would need to construct machine, as hand grinding big mirrors is not something very beneficial for the hands of a musician.
Amateur Telescope Making Main Page. "For it is true that astronomy, from a popular standpoint, is handicapped by the inability of the average workman to own an expensive astronomical telescope. It is also true that if an amateur starts out to build a telescope just for fun he will find, before his labors are over, that he has become seriously ...
One loads a powder charge into a Cannon de 75 modèle 1897 field gun (Socalled French 75). Slate states (in Swedish): Calculating the distance to an airship or airplane is often a very tricky task. View of French soldier, in a field, looking through a telescope, and another, nearby, looking through binoculars.
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Apr 26, 2021 · In 1883, they build the 30inch (760 mm) telescope for the Pulkovo Observatory in Russia, the 36inch (910 mm) objective for the refractor at Lick Observatory was made in 1887, and the 40inch (1,000 mm) lens for the Yerkes Observatory refractor, in 1897, only ever exceeded in size by the lens made for Great Paris Exhibition Telescope of 1900
Used disc grinding machine Int. art. No. m3204 Bwmf7i90g7 Manufacturer PMeyer Type OBO diameter approx. 700 mm, doublesided Year of manufacture unknown power 2,2 kW weight approx. 500 kg table height adjustable and inclinable with div. grinding wheels Item loion: 58730 Fröndenberg/Ruhr The machine can be viewed and tested under power.
A short, F/4 telescope is compact in size and offers widefield, fantastic views, but the mirror is more challenging to parabolize and test compared to a mirror that is F/6 or F/8. If you decide to go with a F/5 or faster mirror, you may very well need to make special polishing laps (and apply special polishing strokes) to parabolize the mirror ...