cave setting circles
Posted 08 December 2012 - 07:09 PM
Posted 08 December 2012 - 07:53 PM
You could buy magnusson setting circles in several sizes from the Cave catalog if building your own Scope.
Posted 08 December 2012 - 09:12 PM
Posted 08 December 2012 - 09:25 PM
Posted 08 December 2012 - 09:35 PM
Thank you for the help dgreyson and Dan.Now Im going to go look at the circles on my Caves.Im on a big learning curve when it comes to my Cave scopes.
Posted 08 December 2012 - 10:10 PM
Chuck - I don't have a polished aluminum sample handy, but I know where there's an 8" f/6 lightweight deluxe with the grey paint scheme that has the 4" version of the circles.
Posted 08 December 2012 - 10:21 PM
Dan - are there any current sources for aluminum or brass setting circles? The bakelite circles on my Cave 12.5 are not in the best shape (the declination circle has a big chip out of it), and I'd like to upgrade if there are sources.
I have a few sets of black aluminum (I think) setting circles. I don't know if they were Caves, though. If you want, I'll double check these tomorrow and let you know what i have.
Posted 08 December 2012 - 10:53 PM
Posted 08 December 2012 - 11:55 PM
Posted 09 December 2012 - 03:26 AM
Out of all the Telescope items I have managed to collect one of the items I like to see the most are the 6" Setting circles on the 65 Cave.. They are just to darn Cool!
Posted 09 December 2012 - 11:34 AM
I paid nothing for the ones I have. They were given to me by Steve Eubanks a few years back. The RA circles might just be rings, though, as they were for a mount he marketed some time back.
Posted 09 December 2012 - 11:50 AM
Im afraid they never will. Parks was the last place offering setting circles and other Cave compatible parts. everyone else is selling "Digital" setting circles now.
I have some sort of 1" shaft gem similar to Astrola/Parks ones with an 8" cradle that has no motor and no setting circles and was counting on getting a clock drive and a set of circles from Parks but I guess thats a vain hope now.
Thankfully, Rolando had a set of brackets he could sell me and I am able to proceed on my restoration on my 12" cave
Posted 09 December 2012 - 12:24 PM
Are you still looking for the aluminum setting circles? I have a set of black aluminum (white numbers)purchased from Parks 2 years ago and never used. They are 6" diameter with 1-1/2" bore. PM if you are interested.
Posted 09 December 2012 - 12:49 PM
Posted 09 December 2012 - 12:54 PM
Geez! $150 for a pair?? Gadzooks!
I wouldn't machine them for that price, regardless of the material (not that anyone asked).
Posted 09 December 2012 - 01:11 PM
Posted 09 December 2012 - 06:07 PM
All the rest of the dec circles are molded delrin with scales attached to the outside edge. The stepped side with the set screw in it is machined, as is the outer edge, but the other side isn't finished. All the dec circles look to be 6" OD, with 1 1/2" bores. All the RA circles I have are also molded delrin with scales stuck on them. They're about 5 1/2" OD and have about a 4 1/2" bore. They were designed to be slip rings riding on a step in the worm gear, several of which I also got from Steve (but these are nothing like the Cave ring gear clock drives):
Here's one of the rings and the one aluminum dec circle I have with a 1 1/2" bore.
Posted 10 December 2012 - 12:15 AM
Posted 10 December 2012 - 02:28 PM
O Magnusson to my knowlage were never were owned by Tom Cave but Astrola did offer O Magnusson upgrade items with Cave Astrola Telescopes.
I have no doubt youre right Clint! I had read this in the 73-74 Cave catalog and assumed they had. Cant beleive everything sales literature says
Posted 10 December 2012 - 04:31 PM
Cool, my 12.5" has the 10" circles on it. They're awesome!
Posted 10 December 2012 - 11:47 PM
The RA cirlce:
Posted 11 December 2012 - 08:16 AM
Is it not supposed to move in step with the polar axis when the clock motor is running? Or is it too loose and spinning? Mine have a teflon rod backed by a set screw so it can be tightened down but still be able to be adjusted against the friction holding it and then keep its new place.
May want to pull it off an have a look at that, someone may have greased it in error.
Posted 11 December 2012 - 09:29 AM