Leonardo's Mirror Grinding Machine. The mirror or lens grinding machine is a masterpiece of mechanical engineering. It has several gears in mesh at all times and also has several variable settings built into it. This machine was most likely designed by Leonardo while he was either investigating the different ways that light reflected off ...
with information about all types of telescopes. Typically, the primary mirror is made of glass. Pyrex is commonly used for the primary mirror because of its thermal stability, but for small mirrors, plate glass will work fine too. Telescope mirrors are relatively thick. The concave shaped face is made by repeatedly
There is a wealth of great information on the internet regarding the benefits of thin mirrors, and techniques for grinding thin mirror blanks. Here is one such website created by someone with much experience the realm of creating fine homemade telescopes using thin (and ultra-thin!) mirror blanks...
Mirror grinding techniques There are many reasons for grinding your own mirror. Either you want a unusual size, or focal length, or to satisfy your curiosity, or to have the "pride of achievement" by fabricating something as precise as a telescope mirror. 300 mm Dobsonian This is my main telescope.
Mirror Grinding Stand, Icon This small sketch shows a side view of the table top with the tool mounted to it. The mirror is free to move around on top of the tool. Materials. This stand is made from a single sheet of 3/4 inch plywood and bits of wood. The parts are assembled with glue, wood screws, and …
There are many different ways of grinding mirrors. The methods I describe are those I use when working at home, grinding and polishing entirely by hand. Where I refer to machine working, it's for your information, and not essential to making a successful mirror by hand. The techniques described in this article are for mirrors of 16" and larger. ...
Page 1 of 2 - Grinding a 10" F/4 mirror for a first project - posted in ATM, Optics and DIY Forum: Hello everyone, I am in the process of starting my first ATM project, a 10 F/4 Dob. I have read a ton of information concerning mirror grinding, and I have decided to grind the mirror myself. I have some quick questions on the suitability of an F/4 mirror for a first project; 1.
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 ...
How to grind a mirror blank into the well-figured basis for a Dobsonian telescope. How to grind the glass, how to carry out a focus test, how to polish with ...
Mirror grinding is a grinding that the surface roughness of the workpiece is Ra< 0.01μm, and the light is like a mirror after grinding, so it can be clearly photographed. The flatness of the grinding surface is not greater than 3μm /1000mm. The surface machining of high precision and high added value parts requires mirror grinding.
With mirror on top, overhang mirror about 40% of its diameter over the tool, so that most of the grinding action is concentrated on the center of the mirror and the edge of the tool. Take straight strokes such that the center of the mirror travels along an imaginary chord 1 on the tool (The red arrow in the diagram). This stroke will rapidly ...
Information for ATMs Zip archive of Mirror-o-Matic Yahoo Groups (2000-2019) 307 Contact Dennis
31 Rough Grinding The first milestone is putting a curve into the mirror face. The curve's depth …
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 …
Want to build your own telescope? Start with one of our telescope mirror kits. Each kit comes with a telescope mirror blank and all the abrasives (silicon carbide grits and white aluminum oxide powders), cerium oxide polish and pitch to grind and polish it to your specifications. Please note that our kits do not include a grinding tool or pitch ...
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.
Products/Services for Parabolic Mirror Grinding Machines. Grinders and Grinding Machines - (985 companies) Grinders and grinding machines use an abrasive that is bonded to a wheel, belt or disc to remove material and improve surface finish. Devices can be pneumatically driven or powered by a combustion engine or electric motor.