Rough grinding is complete for the 12.5 inch honeycomb-back telpe mirror blank. The rough grinding went pretty quickly and painlessly this time. I only have maybe 12 hours of actual work in the mirror so far. It's hard to believe, but the rough grinding has removed over a pound of glass. The mirror now weighs in at only only 8 pounds 15 ounces.
US1171174A US86695214A US1914866952A US1171174A US 1171174 A US1171174 A US 1171174A US 86695214 A US86695214 A US 86695214A US 1914866952 A US1914866952 A US 1914866952A US 1171174 A US1171174 A US 1171174A Authority US United States Prior art keywords shaft tool slide parabolic axis Prior art date Legal status (The legal …
Tools for grinding, polishing and machining various materials. Vitrified. Ceramic Grain CX Wheel; Vitrified-bonded Wheel for Gear Grinding "Gear Ace" New Super-finishing Wheel "Keen Stone" Vitrified-Bonded Wheel for Precision Grinding "LIFE KING" New Mirror Grinding Super-finishing Wheel "Mr. Neo Lapper" Resinoid. Billet and Slab Grinding 3Z Wheel
Grinding the secondary is just like grinding any other optic except in minature. I ground the secondary with the workstand and worked the tool on top just like I would grind a larger mirror. This optic is small enough that a lens grinding machine could work well.
machine, or polishing machine. During grinding high speeds are required, whereas lapping and polishing applications are generally completed at low speeds. The Model 920 also incorporates workstations, which allow for the use of precise Lapping and Polishing Fixtures. Each workstation has it's own speed control, allowing the user to precisely
PeteDCard81, on 21 Jun 2021 - 09:11 AM, said: The Hubble primary mirror was designed to the correct specification (parameters) but ended up misshaped because of an incorrectly assembled null optics test tool. This test tool was acquired from the Perkin Elmer side of the shop that did work on Defense projects.
Page 1 of 5 - Making a Mirror grinding & Polishing machine - posted in ATM, Optics and DIY Forum: Hello, I am on the half of the way to make a mirror grinding machine inspired by original M-O-M design. I made the pulley arrangement such a way that, both the turn table & eccentric spins at 50 RPM fixed. I wont go for making mirror bigger that 10.5 (or max 12).
The mirror machine came to me as a result of astronomical horse-trading, swapping a large GEM mount and a 8" Newtonian OTA for the machine as it was and a start kit consisting of two 6" blanks and the grit, rouge and pitch to manufacture a mirror. The grinding machine had been built to the design of the mirror-o-matic design of Dennis Rech ...
Much is also unchanged - mirror grinding techniques are very similar to those written up by Porter and Ingalls in the 20´s and 30´s. Many amateur astronomers still choose to fabricate their own instruments, for the pride of accomplishment, the gaining of …
• Mirror surface finish • Perfectly sharp cutting edges ... The machine brings all of the proven design, assembly and reliability features associated with the Kellenberger brand to a ... grinding machine Kellenberger 10 is a standard machine that can be customised
After fine grinding, the mirror was rough polished on the fixed-post machine using a pitch polisher. The Ronchigrams in the photo area show the progress of the mirror from rough polishing through figuring. After the mirror is finished up, I use a diamond stylus to engrave my name, the focal length and the date on the back of the optic.
Mechanical assembly is complete. The machine could start grinding now. I still need to build the electronics, and then there's painting and finishing.
Polishing Machine. 4" x 106". Seamers. Horizontal. Sander. Automatic. Machine. Grinding Hand Tools and Bits. Diamond Plated Router Bits and Diamond Abrasive Products.
The design has been worked down to the last bolt in detail as well as a 54 point mirror cell design based on PLOP analysis with a 1.5 inch thick mirror. ... Doing this with my new fixed post grinding machine built this summer. Work is progressing well, and very efficient. Started project in August 2013 and at this point I am ready to move on ...
Information for ATMs Zip archive of Mirror-o-Matic Yahoo Groups (2000-2019) 307 Contact Dennis
Here's the mirror ready for polishing, fine ground to 20 micron aluminum oxide. That's quite the deep curve! Problem #4: build a polishing machine. Now it was time to design and build a polishing machine to polish the glass with polishing pads placed on the grinding tool. More information, specifications, images and video available here...
this polishing machine ca n polish the cone tank .it has a high work efficiency and can achieve mirror finished polish roughnesss em,ail : sales05@jotunmachinery,com tel : +86 (whatsapp/wechat) web : #conepolishingmachine #flapwheelpolishingmachine
• Grinding ±0.008mm • Lapping ±0.005mm Surface finish, roughness Casting • Die Casting Good 1-2µm • Investment Good 1.5-3 • Sand Casting Poor 12-25 Metal forming • Cold rolling Good 1-3 • Hot rolling Poor 12-25 Machining • Boring Good 0.5-6 • Drilling Medium 1.5-6 • Milling Good 1-6 • Turning Good 0.5-6
The machine is shown grinding a 300 mm mirror.How to build a tachometer:
Products/Services for Parabolic Mirror Grinding Machines. Grinders and Grinding Machines - (987 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.
Jun 8, 2017 - Explore Neil Aubrey's board "Telpe Mirror Making" on Pinterest. See more ideas about telpe, telpes, diy telpe.
Gordon Waite is probably one of the better mirror makers using this machine and have incorporated some of his ideas into my plan. I like the fixed-post plan vs others with eccentric drives, because it gets the heavy grinding done in an automated manner, but still give you the chance to hand-figure.
In this paper, the grating grinding mode NC machine which has three linear axes with large-diameter workpiece is proposed to process off-axis aspheric mirrors by the NURBS interpolation method, The X Y Z range of the grinding machine is 1000 × 600 × 600 mm. In this machine, the disk-type grinding wheel for the grating grinding mode is adopted.
My Mirror Grinding Machine. For a long time I've wanted to build a machine for grinding telpe mirrors. 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. …
The machine was used for making numerous mirrors over the next four decades and extensively modified over that period. It embodies the "sub-diameter tool" design approach to making large telpe mirrors whereby the grinding tool is drawn …
Telpe Formulas and Design Comparator This page lists various telpe related formulas and it calculates telpe & mirror parameters for you. It is primarily oriented to the Newtonian reflecting telpe, which is what most first time telpe makers build, although many sections of it are applicable to other types of telpes.
PRECISON MACHINING: TURNING, MILLING, DRILLING & GRINDING. We are a full-service, family-run, short-run design and automation machine shop, providing high quality components at an affordable price, to clients across the United States, Canada, South America and Europe.
The Design . I began by measuring the sizes of what I already had, a 1/3 hp 1750 rpm electric motor and a 25:1 geared speed reducer. Then I took a rough cut at the MoM-20 H-frame and placed the motor and gear box on it. Lining up the pulleys, drilling holes for the mounting bolts and making sure the belts would clear everything drove the design
"The design and manufacture of a larg e CNC grinding m achine for off-ax is mirror segments", W.J. Wills-Moren,, T. Wilson, Annals of the CIRP, 1989, Vol. 38, (1) pp 529-532. Citations (6)
I started this thread to record my building progress of a new mirror grinding and polishing machine. This machine will be capable of handling mirror sizes up to 22". I have decided that 22" is the absolute maximum otherwise becomes too cumbersome to move around. I have won 2 x 1/3 horse power single phase electric motors on eBay, at $45 each.