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Glass tools can stick and cause scratches in larger sizes. More importantly, the glass tool can be saved and used later as a mirror blank for a second project. Grinding Stands. I use an old printer stand. Here is a 25 inch 635cm mirror being rough ground followed by a beautiful grinding stand from the Delmarva Mirror Making Seminar. Grinding
With over 1,600 mirror services completed, I can safely say that this is the most popular mirror service shop If you need the best items to complete your dream builds I likely have what you need. I also review builds for mirror service customers to help them improve their characters. I will try to help any way I can.
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.
My Mirror Grinding Machine. For a long time I39ve wanted to build a machine for grinding telescope mirrors. Dennis Rech39s MoM designs finally inspired me to just get up and do it. Over the years, I39d been collecting motors, gear boxes, pulleys, etc.
A good starter size is the 150 mm 634 mirror. A 200mm 834 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, 34learn and practice34 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
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.
First Grinding log. To setup for a grinding session I needed to provide the mirror mount to hold the mirror on the grinding base and the tool to hang off the eccentric drive arm. The mirror mount I provided for by putting three inserts in the grinding table at 120 degrees on a 634 PCD.
Glass tools can stick and cause scratches in larger sizes. More importantly, the glass tool can be saved and used later as a mirror blank for a second project. Grinding Stands. I use an old printer stand. Here is a 25 inch 635cm mirror being rough ground followed by a beautiful grinding stand from the Delmarva Mirror Making Seminar. Grinding
Hi AllWeve been having some idle discussions about grinding mirrors here. In particular, weve been discussing building a fixed post mirror grinding turntable for cutting mirrors up to about a 24inch diameter to spherical. Its only a pipe dream at the moment, but has anyone had experience building
If youre looking for a way to set up a wireless screen mirroring from a PC to a bigger screen, follow one of the methods below. If you want to avoid spending any money on an additional adapter, follow Method 1 and see whether your equipment supports it.. Method 1 Wirelessly mirroring your laptopPC to a TV no adapter If your laptop is relatively new you bought it in the past 34 years
Then after grinding the mirror face with 220 grit, cleanup thoroughly and flash polish by polishing for 15 minutes. Don39t go onto finer grits until the astigmatism is gone. The second is to identify the saddle orientation, and using a subdiameter lap, locally polish the ends of the saddle.
After the epoxy set up, the shaft was inserted through the collar bore. The 14 inch spoked pulley was slid down the shaft, and its set screw tightened to hold everything in place. Then the three pieslice shaped pieces of wood are placed into the openings between the spokes of the pulley and screwed down to the large wood circle.
Casting a Large, LightWeight Telescope Mirror From Recycled Glass The first photo below shows a 12.5 inch diameter, 1.5 inch thick, telescope mirror blank, made from recycled glass, that has been lightened by casting the mirror in a mold that made lots of hexagonshaped pockets in the back of the mirror. This is
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 12 shaft size pillow block bearings work good for a homemade EQ mount Thank you , John
In September 1858, shortly after his return from Europe, Draper began the construction of a mirror grinding machine of Lord Rosses design. Advances in Abrasive Technology XVI The superhard diamond grinding wheel with largegrit size plays an important role in precision mirror grinding machining .
Much is also unchanged mirror grinding techniques are very similar to those written up by Porter and Ingalls in the 20s and 30s. Many amateur astronomers still choose to fabricate their own instruments, for the pride of accomplishment, the gaining of knowledge and the insurance of quality.
Mirror grinding machine construction log And some other views of the setup. The overarm is just resting on the blanks, nothing is glued or pitched together, just posed for the pictures Mirror seems to be almost finished, maybe an 1834 of pits showing up with the laser pointer.
Here is a close up of the mirroromatic at work. At this stage I was using 320 grit. For all of the rough an fine grinding the mirroromatic was setup to spin the turntable at 50 60rpm an the eccentric set to spin at about 7 10rpm.
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