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Mostly on the mirror size you wish to grind, and the prices of the local market. In the US, telpe mirrors are the cheapest. A decent 6" (150 mm) mirror can be bought for under 100$. In Europe, prices are usually twice, if not three times that. In some countries telpe mirrors are unavailable, so they need to be imported, at high
Astro tel mirror grinding machine 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 telpe making book 1 a bowl which rotated was fitted to the spindle i also built another machine of the same type.
The I.A.U. named asteroid 17823 Bartels discovered 1998 by J.M.Roe in recognition for my contributions to amateur astronomy. Making is the Key to Knowing. A telpe mirror is arguably the most accurate surface made by human or machine. …
The first thing I built was an extension that sits in the middle of the turntable to raise the working surface above the height of the dam. It was made from an 18 inch diameter tabletop and some scrap lumber. I drew concentric circles on the top of the …
Telpe Formulas and Design Comparator. This page has formulas for many telpe and mirror parameters. It will calculate parameters for two different telpe designs and compare the results for you. It provides data to help in selecting a telpe, and also …
Grinding Machine for Large Telpe Mirrors. I designed and built a grinding machine for mirrors up to 42 inches [1.1m] in diameter. By slipping on and off a couple of belts, the machine can quickly be reconfigured for spinning work or for stroking work. …
The 1.3m telpe mirror blank has been completed by Peter Wangsness and is now at JP Astrocraft in Charleston, … 1.3-m Mirror Grinding Machine … Mirror-O-Matic – Dr. Debug Grinding your own telpe mirror seemed like a cool idea until I did more research and discovered all the physical …
Mirror-O-Matic grinding machine. When I decided in 2009 after a ten-year 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 …
Types of mirror grinding machines - posted in ATM, Optics and DIY Forum: Hi to all, I am planning to make a mirror grinding and polishing machine but i have limited knowledge about these machines. Because of this i have some questions to someone who has some experience with those machines; - Some machines have fixed supportes and some of them have a prestaltic moving arm, …
Making a Mirror takes Hundreds of Hours of Work. Not True! A 6" or 8" mirror should take about 40 to 80 hours of effort. While this is a non-trivial amount of time, the mirror can be completed in a few months, and certainly within a year. Most people work one to three hours a …
Mirror Grinding. Telpe mirrors can be manufactured solely by hand in outstanding quality! In what follows here, the process of making a 14"- mirror shall be described shortly. Note: Making a grinding- and polishing machine will reduce the …
Re: Building a fixed post mirror grinding machine. I I had a nice piece of 3/4" stainless dowel that was begging to be used. So I bought a cheap pillow block to provide the locator for the metal dowel, and then drilled the overarm to fit. These pillow blocks are $8 and come complete with a locking collar - …
This is why you don't want to make mirrors to be worked on machines too thin. For 16" to 18" mirrors, 1.62" thick is the thinness I would recommend. There are several ways to support the grinding and polishing machine turntable, but first make sure the turntable itself is rigid. It must not bend.
Mirror Grinding Machine - posted in ATM, Optics and DIY Forum: I have some interest in building a grinding machine for possible up to an 18 mirror, but something that will also do a 6 or 8 mirror. I have plans for the Mir O Matic but would …
Making a homemade mirror grinding machine - posted in ATM, Optics and DIY Forum: I want to make a motorized mirror grinder, any good info on this, i have a couple geared motors, low speed high torque. One more question ...will 1 1/2 shaft size …
This is as interesting to me even if I were to grind some much smaller mirror say 10-12 inches as it would be to scale up to whatever size blanks could ever be found in the future. I've glanced through books on telpe making and although the nature of the project interests me, spending many hours hand grinding a mirror is difficult to ...
Currently manufacturing a 16″ diameter 1″ thick plate glass f3.88 Newtonian telpe 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 …
Basically there are two types of grinding/polishing 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 …
The mirror began figuring with a radius of curvature of 131.8 inches [3348cm], so the total shrinkage was 0.5 inches [13mm]. Slopes. The mirror's surface is curved with varying slopes that direct the parallel light from afar to a point of focus. …
Grinding and polishing your own mirrors is a long, arduous process. Instead of lapping the blank by hand, Laurie Hall built this mirror grinding machine from scratch.
Mirror Grinding Machine. 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.
Re: Building a fixed post mirror grinding machine. Update summary: Lots of work to get to this point. Things I need to probably change or fix: My gearing of the DC motor. I will need a slow speed for polishing (5 rpm), and faster speeds for hogging out and fine grinding (15- 30 rpm), so likely need to think about adding a gear reduction.
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. Most …
Page 1 of 2 - Making my own fixed post mirror grinding/polishing machine - posted in ATM, Optics and DIY Forum: Hey guys. Im thinking of making my own fixed post mirror grinding/polishing and curve generating machine. Ive got loads of …
Similar mirrors are used as the 3.4 m secondary mirror of the Large Synoptic Survey Telpe (LSST) and the 4 m secondary and tertiary mirrors of ESO's ELT. Also around the same time, Roger Angel at the University of Arizona developed a way to maintain …
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