I haven't finished my morning coffee yet, so may be missing something, but what sort of compound angle will this jig not do?
If you need to drill a hole off normal to the surface, the jig aligns that. Then, if the plane of the hole is also not parallel to one of the dial plate edges, you rotate the jig on the surface, around the hole center. I *think* any hole angle can be reduced to a combination of those two rotations... And yes - Tony's suggestion of a mill cutter is exactly what's needed. Out of curiosity, I've asked about it at an on-line machine shop. It looks perfectly feasible there, but I'd like to know how much it would cost! Another approach, similar to Frank King's of designing a mount and mass producing them, would be to fabricate the many small gnomons as a rod with a sharp bend near the end. Then insert the short ends into normally drilled holes in the dial plate, and epoxy in place. A simple guide held (somehow) at a fixed angle to one edge of the plate would suffice to align each gnomon parallel. Dave -----Original Message----- From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Brent Sent: Monday, June 13, 2011 7:34 AM To: sundial@uni-koeln.de Subject: Re: Multignomon Sundial They also make these adjustable jigs for drilling angle holes: (it won't give you compound angles though) http://www.grizzly.com/products/Drill-Guide/H3487 --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
