Good luck John, it's all worth it in the end........... Tony ... From: "John Abrahamian" <imas1@...> To: <atm_free@yahoogroups.com> Sent: Monday, December...
This is not generally done in a production environment. The distortion that's caused by a well design mirror test stand is known and an experienced optician...
... WE start this one in special way here after 400 years hope the same oportunity to all of you ... http://monquebec2008.sympatico.msn.ca/MonQuebec2008/ jack...
What is a simple but fairly accurate way to turn my PLOP X,Y coordinate results for triangles into a template? Is there a graph paper with 1cm grid ?...
There should be graph paper with 1cm grids (although in most cases they will be sub-divided into 1mm graduations), try your local stationers, but if you're in...
There is a free program available called gpaper.exe (Google it) that will allow you to print your own graph paper. ... they will ... but if ... luck out ... ...
Here's one way: Get yourself a low cost or freeware CAD program. Lay out the points and shapes and then export to a PDF file at life-size scale. Take the file...
I just found this free software program: www.atmsite.org/contrib/Holm/cellparts/cellparts.html It lays out and pretty accurately prints cell part templates. ...
I was lax with a critical component of working a large mirror into submission. There seems to be a high area in one part of the 25" blank out near the edge on...
Out of interest there used to be a web page with some info on using flat angle grinder type segmented cutting discs on the web. A milling machine and rotary...
... John, The steps you have taken should improve your results. I had a similar problem with a thin 16 inch mirror because of a high spot on my turntable. I...
... . I am going to keep your suggestion in mind Dave and don't be surprised if I bother you with more questions later about a useful overhang percentage to...
... flat angle grinder type segmented cutting discs on the web. A milling machine and rotary table was used the aim being to grind radii directly onto glass. A...
I have an antique brass refractor tube. The lens and cell is missing but I have the end piece that is the base of the push pull cell. The tube is about 5...
... Tom- You can see an 80 mm short tube I constructed at this link: http://tech.ph.groups.yahoo.com/group/naperastro/photos/browse/a185?b=41&m=t&o=0 John A...
Jerry, Have you tried the Antique Telescope Society? http://www.webari.com/oldscope/ ... missing but I ... is about ... missing but I ... Benjamin ... have...
Hi John, You made one eh? So do you just use carbon fiber twill fabric (I saw this at the link Greg gave for Tap Plastics - thanks Greg) in place of fiberglass...
... Here's a link to S glass which is I believe what I made the tube out of. It is fibreglas cloth in one direction of the weave and carbon in the other...
... The S glass is the one weave direction and graphite is the other so you must order the GRAPHITE 3.5 oz/yard cloth. It is black and white checkerboard in...
... place of ... cloth? ... all that ... The cloth I used was around $40 / yard. It was 38" in width so you'll be short and have to overlap the ends to get...
Tom, If you go ahead with your project make sure you use an epoxy resin. Who ever sells you the cloth will also have the correct resin. Epoxy resin is much...
John, Greg, Thanks much for the information, photos, and advice. It seems the aeromat layer would be very important for stiffness. It also looks like this is...
Tom, I've been using WEST System and System 3 epoxies for the last 25 years on various projects. I know the WEST products were developed by boatbuilders who...
I've also used Aeropoxy because it has a higher transition temp and cheaper than West Systems. Saves you from the hassle of having to high temp cure it. It is...
