May every second of the New Year bring joys, happiness, health, wealth, opportunities, pleasant surprises, bonding, creative ideas, profitable ventures, happy...
15191
tnut55
Jan 1, 2010 3:09 pm
Very cool. I noticed that it looks like you used a cardboard tube as a mandrel. Did you retain the cardboard as part of the structure or did you slide the...
15192
Mark Holm
holmmd17
Jan 1, 2010 5:46 pm
S&T have published a free complete index to the whole run of the magazine. For the moment, it is just a big file. You have to come up with your own search...
15193
Richard F.L.R. Snashall
rflrs2000
Jan 1, 2010 6:35 pm
... I can read that csv format in both Excel and my editor, both of which can do some forms of search. Thank you, Mark!...
15194
astrodavetandy
Jan 1, 2010 8:16 pm
Mark, I use Sonotube as the form for the tube. Since the tubes aren't perfectly round (they are usually within 1/8", though) I insert into the tube 3/4" thick...
15195
Mark Whitaker
tnut55
Jan 2, 2010 3:27 am
Very interesting. I've fiberglassed a couple of cardboard tubes but left the tube integral to the structure. I've been wanting to make one that is purely...
15196
Attilla
attilladanko
Jan 2, 2010 6:15 am
Anyone know of a PLOP-like design for cellular blanks of the sort Wagness optical makes?...
15197
astrodavetandy
Jan 2, 2010 4:59 pm
Mark, You should give it a go. Did you vacuum bag your fiberglass tubes? You'd probably want to do that to maximize the benefits of using carbon fiber. There...
15198
Mark Whitaker
tnut55
Jan 2, 2010 7:06 pm
Dave, No, I just applied the fabric and wetted by roller. I did motorize the mandrel so it would slowly spin. This aided in applying the resin and keeping it...
15199
"Mr. Wizard!"
artbianconi...
Jan 2, 2010 11:46 pm
Back in August of 2006, Rob Willett of London, UK, announced a free program for designing and printing setting circles. It's the best program for that...
15200
jacques savard
suppjos
Jan 3, 2010 12:05 am
it look like and autocad fonction if it is it was whritten in autolight a very special sofwahare akind of prolog sofwhare jack 47'n 71'w Back in August of...
15201
"Mr. Wizard!"
artbianconi...
Jan 3, 2010 3:07 am
No I don't think so Jack. He and I spoke many years ago about the programming. There was no mention of any CAD software. I'd have remembered that. Thanks...
15202
gharper68801
Jan 3, 2010 1:22 pm
Hi, I found what might be the program at, http://www.startrak.co.uk/MakingSettingCircles.htm It did not run on Windows Vista. I changed the compatibility mode...
15203
jacques savard
suppjos
Jan 3, 2010 3:28 pm
probaly but It still possible to draw this whit only 1 command in autocad it is and arry and also possible to plot on a big sheat of paper on a plotter jack...
15204
astrodavetandy
Jan 3, 2010 3:46 pm
Mark, I use a fabric peel ply. I think it is called Econo Ply. It leaves a slightly textured surface that bonds well with subsequent layers of cloth. Nomex...
15205
suppjos
Jan 3, 2010 4:32 pm
in reading a harchive I find this look like sombody have the same interrogaion of me I plan to used optic maouse better output they work whit some kind of...
15206
jacques savard
suppjos
Jan 3, 2010 7:25 pm
first addition I read all the paper I have stock for this project and find this one important http://hscience.tripod.com/Atm.html but he used mecanical mouse ...
15207
"Mr. Wizard!"
artbianconi...
Jan 4, 2010 5:59 am
Dupont "Dacron" is the standard bearer for peel ply. It's a material used for covering older fabric aircraft and comes in several weights (grades). It does not...
15208
Berthold Hamburger
beastro.geo
Jan 4, 2010 3:21 pm
Hi, I received today my diamond pellets from Gator Diamond. I received 20x 16mm pellets (60/80 grit) cut in half (40 in total) and they included some surplus...
15209
asad mehmood
asadscientis...
Jan 4, 2010 4:20 pm
hi, i am polishing a 5 inch mirror. after completing fine grinding with grit # 1000, i polished it with thin CeO solution and repeatedlly found 3 elevations...
15210
Mark Whitaker
tnut55
Jan 4, 2010 6:28 pm
It would help to know, at least in generalities, what type of figure you have. Is the edge turned up or down? Is the center a hole or a hill? What you have...
15211
Guy Brandenburg
gfbrandenburg
Jan 5, 2010 2:12 am
Berthold, That sounds very interesting. I have been considering ordering some of those pellets from the same source. Have you decided exactly how are you going...
15212
Vladimir Galogaza
vgalogaza
Jan 5, 2010 9:44 am
Guy, ... I think that main problem with power grinder is vibration which comes from great speed of the tool usually not fixed well. If instead of +10000 RPM,...
15213
Berthold Hamburger
beastro.geo
Jan 5, 2010 10:29 am
Guy, I will epoxy them to a flat plaster base. Since I have 40 half pellets, I will probably make 2 bases. 150mm and 90mm to cover mirrors from 8"-16". My...
15214
Ali Khan
ak6666666
Jan 5, 2010 3:32 pm
Ken, When I was a kid I knew of only three telescopes, Kitt Peak, Mount Palomar 100" and 200" Hale telescope. In a documentary i saw that the image from Kitt...
15215
Ken
atm_ken_hunter
Jan 5, 2010 5:07 pm
Asad, If the depressions are circular in nature, the one thing that comes to mind is to advise you to make sure that you polishing lap is not symetrically...
15216
Ken
atm_ken_hunter
Jan 5, 2010 5:16 pm
Ali... Not such a big deal with the pitch burns. The pitch hit me with many small droplets which stuck and burned my hands and arms. Life has given me many...
15217
"Mr. Wizard!"
artbianconi...
Jan 7, 2010 5:41 pm
I have found Rob Willett and his web site. It was worth the effort and I am pleased to share this link with you. ...
15219
"Mr. Wizard!"
artbianconi...
Jan 7, 2010 8:44 pm
I copied the wrong web site link for Rob's Setting Circle program. Sorry. Here's the correct one http://www.settingcircles.com/index.php?cmd=home_screen ...
15220
Maciel Bassani Sparre...
macielbs
Jan 9, 2010 2:07 am
Hello! So far I was only a listener, but I want to introduce myself and my ATM project. I apologize for this long text in bad english! :) I'm a brazilian...
