Hello to all and thank you for letting me join the Router Forums community.
I am in the process of making the wife an arbor for the backyard garden and have some questions, mostly looking for expert advice. The arbor is basically made using Qty four 4 X 4 post in a square pattern and the top arch is the part in question. The arch top will be made with Cedar 2 x 6's, and will be 3" thick (doubling up the 2 x 6's), I used a segment calculator, determined the length of each segment at roughly 21.5" and cut the 2 x 6's at 22.5 degrees (basically a half octagon). Arch will be big, basically 51" or so outside, to 44" inside (give or take a little).
I literally have zero router experience even though I have a fair amount of woodworking experience, four years High School wood-shop using Shapers, Planers, Jointers, Cabinet Saws, Lathes, etc.
I have cut the 2 x 6's to keep the grain all oriented the same direction the best I can.
I plan on taking shallow passes, even though I have not determined what constitutes a shallow pass, maybe 1/8"?
Plan on keeping the feed rate slow, RPM's at ???? (Router has 10,000 - 25,000 as I recall).
Plan on clamping the work down to a solid table, working at about normal workbench height.
I have mocked up a doug fir 2 x 6 top to get some practice, beyond that I have no idea what I am doing.
My comments above are based on my research of do's and don'ts.
THANK YOU FOR ANY COMMENTS!
welcome to the the forums Robert... ''I literally have zero router experience''...
we can help w/ that...
head over to this link
for some light reading... (splines are covered there)
for other than the splines, I believe a router isn't the best tool for this project...
your cedar, is it Western Red Cedar??? It should be...
If I interpret what you doing you are actually making a vaulted arbor w/ a solid ceiling/roof... Correct???
your wood is going to have seasonal movement like it was trying to move it's self next door unless you select it carefully..
I would use a splined (if the arch is self supporting) birdsmouth joint easily done on the table saw w/ a dado blade...
cut the spline groves w/ a slot cutter...
use white oak for the splines...
got more questions??? ask away!!!!