LumberJocks

Copper Patina Garden Gate #3: Knowns & Unknowns

  • Advertise with us
Blog entry by newTim posted 1864 days ago 2918 reads 1 time favorited 5 comments Add to Favorites Watch
« Part 2: Arches & Jughead Part 3 of Copper Patina Garden Gate series Part 4: Cutting the Segmented Arches »

The challenge is trimming the arch rail to the exact width at the exact angle which, when combined with the bottom rail, will produce a square frame.

These things I know. The interior width of the gate should be slightly wider than the copper panel which is 24” (because I don’t want to mess with cutting the copper). The width of the arch must be exactly the same width of the bottom rail. The sides of the arch rail must be parallel. And the most important thing, the centerline of the arch rail will be in line with the centerline of the bottom rail.

So how to cut the arch? Simply use the bottom rail to line up the arch (top) rail.

First cut the bottom rail to width and draw a centerline. Set it on a cutoff sled flush the edge (hopefully square to the blade) of the rail to the edge of the sled.

Transfer the centerline from the bottom rail to the cutoff sled.

Line the centerline of the top and bottom of arch rail with the line on the cutoff sled. Fill the angled gaps at the top with the cutoffs from the glue up.

Clamp and cut and admire the results.

Oooooooooh! Ahhhhhhhhh!

-- tim hill www.newcalshop.com



5 comments so far

View jlsmith5963's profile

jlsmith5963

297 posts in 1934 days


#1 posted 1864 days ago

Tim-
Looking at the arch template in the last picture (it may be just a distortion of the view angle) it makes me wonder whether the two arcs are concentric or has the same arc been copied. Copied arcs sometimes end up looking a little odd (the eye can be a very precise judge). A better explanation of what I am talking about can be found in this video http://garymkatz.com/Video/segmented_radius_illusion2.wmv

good luck with the project

-- criticism: the art of analyzing and evaluating the quality of an artistic work...

View newTim's profile

newTim

553 posts in 2192 days


#2 posted 1864 days ago

jl… Wow! Thanks so much for the link. Great presentation on arched segments. I didn’t even know the correct term was “arched segments.” The video explains what I had found out through trial and error, that the inner circle is smaller diameter than the outer circle. Assuming you want the width of the segment to be the same as the width of the stiles. This is why I like LJs so much.

The template I made was poorly cut. That’s why I plan to use a tramel arm to make the final cut. The key, I think, is to use the same pivot point on both circles relative to the piece, but you use two different pivot holes on the tramel. Assuming the stiles are 5 1/2” wide, the two points on the tramel would also be 5 1/2” apart (note: actually they would be a little less depending on the diameter of the router bit, one side cutting and outer arc, the other side cutting the inner arc).

Many many thanks.

-- tim hill www.newcalshop.com

View a1Jim's profile

a1Jim

111999 posts in 2163 days


#3 posted 1864 days ago

good link

-- http://artisticwoodstudio.com Custom furniture

View jlsmith5963's profile

jlsmith5963

297 posts in 1934 days


#4 posted 1864 days ago

Tim-
I am an architect and a former teacher of design, this kind of geometry stuff comes with the territory and I have the scars to prove it. Glad you found the info useful. Oh, and I would quibble with the term arched segment… its actually a segmental arch (got to maintain the architect as a-hole mojo) lol

-- criticism: the art of analyzing and evaluating the quality of an artistic work...

View newTim's profile

newTim

553 posts in 2192 days


#5 posted 1864 days ago

That’s right. Segmented Arch. I screwed it up. Love the video. Got any others? BTW, isn’t the plural of radius, radii? ;)

-- tim hill www.newcalshop.com

Have your say...

You must be signed in to post the comments.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com

Latest Projects | Latest Blog Entries | Latest Forum Topics

GardenTenders.com :: gardening showcase