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How to copy a curve?

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Forum topic by JPKnapp posted 06-01-2009 04:48 AM 6282 views 0 times favorited 4 replies Add to Favorites Watch
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JPKnapp

18 posts in 2750 days


06-01-2009 04:48 AM

I want to build a new window blind that fits a large curved window above my family room windows. Any suggestions on how to copy the curve?

-- I specialize in expensive mistakes.


4 replies so far

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tooldad

660 posts in 3179 days


#1 posted 06-01-2009 04:56 AM

invest in a big copy machine???

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tooldad

660 posts in 3179 days


#2 posted 06-01-2009 05:00 AM

more seriously though, I take it you are wanting the blind to follow the curve?

Grab some paper on a roll, like wrapping paper or construction paper and create a scribe using a stick with a dowel on one end and a pencil in the other. Tape the paper to the wall, and follow the curve with the dowel creating a concurrent radius or just trace the curve of the window for an exact copy. Then you can measure and do the math to figure radius. Finally transfer it to a sheet of 1/2” mdf or 1/4” hardboard for a pattern.

Remember the radius increases as you outward from the center point of the arc.

that is my suggestion

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patron

13537 posts in 2805 days


#3 posted 06-01-2009 05:04 AM

if its a half circle , just measure across the opening this is the diamiter , half that an you get the radius .
hope this helps .

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

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a1Jim

115202 posts in 3041 days


#4 posted 06-01-2009 05:22 AM

If it’s round do as David suggest if it’s oval make a pattern with paper ,cardboard or thin strips of wood hot glued together and use your pattern to make your window blind.

-- http://artisticwoodstudio.com Custom furniture

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