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Hi All, Attached is a photo from Reed Estrada on progress on the mirror cell and mirror box he is building for the 1 meter photometric telescope with his son...
Dr. Olivier Guyon Subaru Observatory Dear Olivier, It was so good talking with you in person at the Pasadena AAS meeting. How is your coronograph project at...
So what's the desired spec ? A glass grinding CNC would need to be very stiff, but not for the same sort of loads as my metal milling Hurco. How big, really ?...
So what's the desired spec ? A glass grinding CNC would need to be very stiff, but not for the same sort of loads as my metal milling Hurco. How big, really ?...
Hi Steve and Alt Azers, I'll let Andrew Aurigema suggest a spec. I imagine there is a large difference between a CNC for glass work in optics, and sort of...
Hi Russ, Hi Howard, My experience mirrors Dave – three points are better (easier to get equal weight on each ground contact point) and that rounded ground...
Hi Howard, Dave, and Richard, An important question has come up on the mirror box for the 1 meter photometric telescope. As I mentioned, Reed Estrada and his...
Hi John, I think Andrew wants to mill in non rotationally symmetrical things such as recessed "pockets" for hex mirror segments (hex shaped, flat at the...
Hi Mike, An excellent idea. Presumably the greater the greater the ground clearance under the telescope's "chassis," the less humped the loading track would...
Steve, The loads are nearly zero. The foam has about the same milling resistance as burnt toast. As Russ was saying it is fairly light. A puck of it 6 feet...
Yes it has to be CnC router table like. The bed has to be around something like 72"x72" with a "4 to 6" Z depth. Since there is very little drag, maybe...
Dr. Jerry E. Nelson Lick Observatory University of California Santa Cruz Hi Jerry, As I mentioned a while back, Ray Weymann suggested I contact you for ...
Andrew, Any possibility of using servo motors/encoders with sync belts for positioning? I've been looking into zero backlash belts/toothed pulleys made by ...
Hi Drew, A trailer will be a necessity for the 1.5 and 2.0 meter telescopes. For the 1 meter telescope we will be towing a travel trailer with the Jeep (the ...
Russ, I may just be getting burned out on design and build or getting lazy but I don't really want to design and build a cutter. I want to assemble one from a...
... You'll have local sources for bits, but I use these guys in the UK for my parts. http://www.worldofcnc.com/ What kind of precision do you need ? Ball...
Hi John, I've pasted in below a drawing of the mirror box from the top and a side view. We plan on having a stiffening truss structure below the mirror cell,...
Hi Russ-- From the photo you sent the other day, I can't quite tell how far apart the adjustment bolts are. However, assuming they are 20 inches apart, then...
Hi Russ, Hi Howard, My experience mirrors Dave – three points are better (easier to get equal weight on each ground contact point) and that rounded...
Hi Howard, I'd leave that seemingly extra space alone - at least most of it. Allowing for more collimation adjustment than you think you need is a good idea...
Hi Andrew, I understand on not wanting to build a CNC machine yourself. However it is an overall interesting question on what it takes to build one either...
Hi George (and Andy), An integrated trailer/telescope would indeed make an elegant solution for a transportable observatory -- probably up to 2 meters in...
Steve, I am guessing that 0.005 or 0.010 inch would be accurate enough. I have a little Fireball 90 CnC mill that I have modified a bit and it is good enough....
Ok. I looked at the site in England and that mill they had was very cool. Built from aluminum space frame. That is clever. Making a mirror box out of that...
I have been following this group for some time with allot of interest. I have built a few cnc machines for fun. I believe I have enough stuff laying around to...
Hi Donny, Many thanks for your email. It seems likely that we will need a three axis CNC milling capability for 1-2 meter mirrors that are based on foam...
... LinuxCNC is pretty good and free - it will drive nearly anything if you can set it up. Since the mirror surface is rotationally symmetric, carving it would...
Hi, I was surprised to learn about LinuxCNC - we were considering customising software we have for observatory control to run CNC..learning that somebody...
Hi Cary, I got this also from Renishaw, but had not taken the time yet to look up the costs. Any idea on prices? How does this compare with their earlier...
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
