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Dave, This is great. It sure looks like this is working to me. The next iteration will be even better as you are learning what works. I am still getting the...
I have lots to learn so take your time. Maybe you could get Lockwood to try something. Lord knows he has the talent for it. One thing I have discovered, the...
Good thing we will have ¼" glass on the next run. When I get them cut you can tell me how to grind them so they don't glare. Keep going.......... This is...
I'm considering various options for the azimuth and elevation drives on the 1-meter telescope I'm designing. I’ve summarized my thinking below. Please...
Hi Russ, Hi Howard, Thanks, very helpful and encouraging response! That's the spirit - build the real deal first and tweak it until it works! That puts a...
Hi John, Thanks very much for your helpful input. There are well established design techniques for rolling contact bearings, and they take into account the...
Hi John, Thanks for your input. I'd recommend leaving this design detail for later. When the properties of the rest of the 'scope are known, it will be...
Hi John and Joe, Thanks ever so much for running the tests. Comforting results. i look forward to more details. Cheers, Russ Hi, my colleague Joe and I...
Hi Russ, Hi Dave, Perhaps this would be a good time to check your weight estimates. We originally thought that the CDK700 would have a total weight of...
Hi John, Thanks for your quick note. Just a quick note from the controls viewpoint: I think that unless you can depend on very accurate and fast position...
Hi Howard, Thanks for your email. As I mentioned, Joe Haberman has completed some initial optical analysis. I'll summarize my phone conversation wit Joe...
Hi Craig, Many thanks for your comments (below). I very much look forward to your rule on the optimal relationship between wheel diameter and crown radius ...
Hi John, Many thanks for your encouraging words. A somewhat far out option, but it may be worth investigating. It will probably take some more optical...
Hi Mike, Thanks very much for your input. (Mike): I will have to think about this business of trying to stay with a Dobsonian altitude design with this sort...
Hi Mike, Thanks for your input. [Mike] To make a flexible mirror rigid, the cell has to be rigid. That sounds obvious but we can't go a single step further...
Hi Mike, An excellent input from Joe. Certainly very good news on his initial optical design results. A corrector is looking very good. THANKS JOE!!! Thanks...
Hi John R, We frogs call it deerooup. Back to the problem of the instruments at prime focus drooping as the long, lighweight OTA in the 1-m f/4 telescope tips...
Hi Mike (and Howard and Dave), I'm delighted that it looks like an 18-point flotation cell will do the job. Nice analysis. And a nice refinement on balancing...
Hi John, Good point that a droopy OTA could also be a bouncy one. As we stiffen the OTA (getting more expensive or heavier) some analysis should suggest ...
Hi Dave, Good point. Not only could custom optics provide a better optical solution, but there might be better off-the-shelf lens solutions. This was just ...
Hi Craig and John, I've been following the discussion on telescope vibrations. I liked the reference David provided that suggested the best way to handle...
Hi Craig, Mike, and John, I think we have settled on a basic azimuth approach for the 1-m telescope, and that is to have four slightly crowned steel wheels...
You Alt/AZ guys worry me. I gota tell you guys that a Porter style Split EQ is sounding better to me with every passing read of what you are planning to do....
Dr. Virginia Trimble Physics Dept. Univ. of Calif. Irvine Hi Virginia, Thanks ever so much for your talk at the Pasadena AAS Lightweight Alt-Az Telescope...
Hi Tom, Great chat on the phone. I’ll summarize for the benefit of others. Your idea of having a differential and shaft between two opposing drive wheels...
Hi Andy, Nice chat on the phone on azimuth tracks and drives. It sounds like the easiest way to obtain a flat track is to turn it on a large lathe, and there...
Hi Mike, Joe, and Dave It might pay us to have an early optical bench test of the 1-m mirror to help us with our mirror support and telescope design...
Hi Tom, Thanks very much for your input. Russ, I don’t know how much help my comments will be. I think folks like Dan have a much better grasp of the...
Hi John, Thanks for a helpful input. I think Dan's most recent control system has the current capability to drive multiple fairly beefy motors, and thus one...
Scheduled Maintenance:
We are undertaking some essential, but extensive maintenance to improve Yahoo!
Calendar. Your Group Calendar is being migrated to a much improved version of
Yahoo! Calendar. During the maintenance period, you may not have access to your
Groups Calendar.
We sincerely apologize for this inconvenience. Your Groups Calendar is in great
shape and we are working to have it available again as quickly as possible
- Yahoo! Groups & Yahoo! Calendar Team
