Roger Sinnott wrote: > Mac and others, > > Here is a first attempt, using Google Sketchup. > > -- Roger > > ________________________________________ > > Nice!! So, you have two matching inclined surfaces, one on the pedestle, and > one on the "carrier". > If you were doing this for a telescope, I guess you'd put two Teflon pads on the carrier's surface. For this application, more friction is actually beneficial, so that's not necessary.
I've seen Poncet mounts that use a ball/socket for the pivot point. How are you suggesting the pivot be made? Maybe a rounded pin into a conical hole in a hardwood block? And it looks like the pin would lie in an equatorial plane, parallel to the polar end plane... Is there a height alignment requirement for the pivot point, relative to the inclined plane? Horizontally, it should be centered, but I have a feeling it needs to be placed at the right height on the meridian end, as well. Great sketch - I have to get around to learning Sketchup! Dave > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------ > > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
