On Saturday, June 24, 2017 at 8:13:25 PM UTC-7, JBL wrote:
I am attempting to make a few "dovetails" which are brackets used to
attach a telescope to a telescope mount....

I thought I'd be able to get away with an old circular table saw I had.
Last week, I made some 1/4" thick dovetails of a slightly different
design using my table saw fitted with a plywood blade.

You can get metal-cutting (carbide) blades, and can get 'em ground for a
60 degree bevel on the edge, so that the blade cuts one sidewall of a
dovetail socket. It's easier, though, to get a bar and bevel its edges, for
the male half of the dovetail, then another bar beveled at the edges
can be ripped in two, and the halves mounted on a plate to form the
dovetail female.

Don't write off your saw just yet, it could have something simple like
metal shavings in the brushes. A cleaning and some lube can bring it
back to functional.

If a track is what you need, there's suppliers that can deliver it by the millimeter,
with lots of options.
http://www.igus.com/drylin