Tut44 making a mirror grinding tool.Mirror grinding machine.I made my first mirror grinding and 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.I also built another machine of the same type.
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Fixed-post machine grinding is where the mirror is on a turntable rotating around 20 prm speeds vary, and a 75 tool is on top.They are already curve-generated.The tool is hanging over the mirror by 16 the diameter of the tool, or about 18 diameter of the mirror, and is fixed in this position.
Strasbaugh polishing and grinding machine.You wont find very many of these around.Strasbaugh is the premier manufacture of machines used by the professionals.This machine is solid no plastic or wood.You can adjust the spindle and eccentric speed with a turn of a knob while running.It makes mirror grinding a pure joy.
Mirror grinding machine design.Mirror grinding machine design mirror grinding machine - atm, optics and diy forum ,- mirror grinding machine design ,this image shows the 3d model of the overarm assembly i added to my small spin-post grinding machine im building a bigger one now based on the same basic overarm design in the one shown, the overarm is ,.
Grinding on the picture below the machine is fine grinding an 8 inch mirror with an 71 tool 143 mm diameter and 9 micron aluminium oxyde.The bent lines on the mirror are the effect of the tool turning - with respect to the mirror - faster at the central part of the mirror as compared to the edge zones.
Homemade polishing machine,grinding 10 pyrex telescope mirror.First stage of grinding a telescope mirror pt 2.Panasonic hdc-sd60 telescope mirror grinding machine.Telescope making, checking the depth of curve during rough grinding.
Fixed post mirror grinder advicediy astronomer.Nov 01 2011 basically there are two types of grindingpolishing machine.The traditional type which involves the mirror rotating at a relatively slow speed a few rpm for a big mirror 16-20 inches with the tool moving across the mirror from side to side at a higher rpm depending on the size of the mirror andor tool.
Machine tool inspection mirrors tools home improvement.Telescoping led lighted flexible inspection mirror 360 swivel for extra viewing.3 out of 5 stars 349.Get it as soon as wed, jul 15.Free shipping on your first order shipped by amazon.135mm telescope spherical mirror - 1000mm focal length.1 out of 5 stars 2.
Information for atms zip archive of mirror-o-matic yahoo groups 2000-2019 307 mb contact dennis.
Telescope grinding machine optical instruments.Indeed, between 1513 and 1517, he imagined machines to grind and polish telescope mirrors, which, at the time, were made of bronze.Telescopes mirror grinding equipment kconsulting.How to make a telescope mirror grinding machine grinding mirror.
Telescope mirror grinding machines.Get price read more mirror grinding machines telescope mirror grinding machine grinding mill china grinding and testing a telescope mirror rasc st john s centre you need special machinery to grind a mirror indeed you do if you are going to use machinery at all the machinery must be made to mimic the human action humans make the best.
Grinding a mirror 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 interested in the.
For example, a 6 f8 mirror has a target sagitta of 0.I would select the 0.023 which have a total thickness of 0.047 to measure this gap.Put the mirror face up on a table.Hold the steel rule vertically across a diameter of the mirror i., make sure it passes over the center of the mirror.
Mirror grinding machine ebay.Save mirror grinding machine to get e-mail alerts and updates on your ebay feed.Items in search results telescope mirror grinding machine design info plans original 1951.A construction manual for converting the mirror -o-matic.The original mirror -o-matic had a turntable that doubled as a slurry drip pan.
More recently, george willis ritchey, in his turn, improved and used the same type of machine, in the united states first particularly for the making of the 2.5 meter mirror destined for the mount wilson hooker telescope then in france at the optics laboratory of the dina foundation at the paris observatory.
Telescope mirror grinding machine for sale.Mirror grinding machine g w ritchey flickr photo sharing grind a series of telescope mirrors starting with a 24inch and then a 60inch mirror for a telescope initially intended for the yerkes observatory the grinding machine.November 25,2001 by.
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.Fd 4 well suited for deep sky observations.On the opposite, a shallow mirror e.Fd 8 will be performing very well on planets and the moon.
Newtonian telescope is its primary mirror.Most newtonian primary mirrors have either a spherical or a parabolic shaped concave face.Unlike most other mirrors in your home, the mirror coating of a newtonian mirror is actually applied to the front face of the glass, not the back.The light collected by the newtonian primary mirror does.
Rough grinding a 20 quartz telescope mirror on the fixed-post machine this video shows how to setup a mirror grinding machine for fixed-post grinding, also known as spin grinding or spinning.After setup, youll see how abrasiv.
A way to achieve this, is hiding the mirror behind so called zone masks that only have apertures for specific and well defined concentric zones.It is then possible to determine the radius of curvature roc of the actually open zone.Working through all zones defined, we get a sample of different rocs that define the actual geometry of the mirror-surface.
Telescope mirror grinding machine based on dennis rechs m-o-m 20.Cnc telescope mirror grinder.Dec 6, 2006 rough and fine grinding the mirror is about half the work.Polishing is the other half.Testing and figuring makes the third half.Ive ground a few by hand, not to say i know anything about machine grinding.
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 softer and grinds faster, needing less abrasives and with these small sizes, the low expansion glass like pyrex has no practical visible at.