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Forum topic by Purrmaster posted 04-05-2014 04:31 AM 903 views 1 time favorited 29 replies Add to Favorites Watch
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Purrmaster

800 posts in 779 days


04-05-2014 04:31 AM

I want to build the chair described in this web site:

http://www.thedesignconfidential.com/2013/07/free-diy-furniture-plans-build-francine-dining-chair

I know that to most of you this looks simple but this is the first time I’ve actually cut anything curved. Curves are why I recently got my bandsaw.

I’ve attached the image below from the website. The first step is to cut out the back legs. But I don’t know how I should trace out of the curves on the board. I’ve got the 2 X 4s, at 42 inches length already. Actually they’re about 1.5 inches thick (made out of sycamore) but I think they’ll do.

I’m not even sure how wide the legs are supposed to be. And as I said, I’m not sure how to trace the pattern out on the board. I’m hoping that actually cutting them on the saw will be fairly easy.

Like I said above, I know this looks super simple for most of you. Well, I’m afraid it isn’t so for me. To me, this seems hard.

Thanks very much in advance.


29 replies so far

View Paul's profile

Paul

534 posts in 251 days


#1 posted 04-05-2014 04:43 AM

For complex or in this case not so complex I still refer back to a lead drafting tool. It’s basically a lead wire that I can bend to shape. You then simply draw your reference line from the lead wire/tape and cut.

You can find them at most art stores and come in many lengths.

Paul

View waho6o9's profile

waho6o9

5078 posts in 1263 days


#2 posted 04-05-2014 05:06 AM

make a template out of scrap plywood.

First lay out your measurements according to the plan.

Just sketch it by eye or use the lead drafting tool mentioned
above.

If you mess up your template start over. You can do this, it’ll
be a good skill builder for you.

View Purrmaster's profile

Purrmaster

800 posts in 779 days


#3 posted 04-05-2014 05:33 AM

I’m ok with cutting out a template but I still don’t see how to properly trace out the pattern on whatever I’m going to use for the template (probably thin plywood).

I get the idea of the wire. But I wouldn’t know where to physically put the wire to make sure I get the correct curve. How to turn this picture into a physical pattern is what I’m struggling with.

I’m probably not making myself very clear. Unfortunately my brain sucks at spatial orientation (among other things).

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Paul

534 posts in 251 days


#4 posted 04-05-2014 05:42 AM

I won’t be in my shop until Monday morning but if you are still having trouble visualizing I can snap off a few photos and get them to you.

Paul

View TobiasZA's profile

TobiasZA

131 posts in 225 days


#5 posted 04-05-2014 05:55 AM

Hi Paul, try playing around with some old fashioned graph paper if you can’t find a lead wire.
Cheers
Tobias

View Iwud4u's profile

Iwud4u

406 posts in 215 days


#6 posted 04-05-2014 06:13 AM

You can make the curve to whatever appeals to your eye. It doesn’t have to be an exact match, just start and stop on the measurements given and eyeball the curve. I usually bend a thin strip of wood into the curve and trace it. If you don’t like the curve erase it and bend it more or less until you like it.

-- It's far better to be criticized by a wise person than applauded by a fool --

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Purrmaster

800 posts in 779 days


#7 posted 04-05-2014 06:22 AM

Doesn’t the curve have to be pretty exact in order for the user not to be uncomfortable? Or at least

I’m sure the person who created the plans/image did just freehand draw it. I tried free hand drawing it and what I ended up with wasn’t a curve, but a squiggle.

Any photos/patterns/etc would be most welcome. I’ll look at some art stores for the lead wire. I’m just not sure how I’ll place it.

Could you please provide a link to a place that sells said wire? My Google searches aren’t turning anything up. If I can find an example I can probably find it locally. Thanks.

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Iwud4u

406 posts in 215 days


#8 posted 04-05-2014 06:24 AM

It’s only a slight curve within 20”. I don’t think you could be to far off.

-- It's far better to be criticized by a wise person than applauded by a fool --

View pintodeluxe's profile

pintodeluxe

3443 posts in 1500 days


#9 posted 04-05-2014 06:27 AM

I find it helpful to lay out a square grid of pencil lines every 1” on my templates. Then bend a 1/8” hardwood strip to draw the curve. Be sure to leave the leg square where it will intersect the seat rails.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View runswithscissors's profile

runswithscissors

1005 posts in 712 days


#10 posted 04-05-2014 06:29 AM

Fixing a thin, flexible batten (stick) at both ends and then flexing it is a good way to strike a smooth curve. By moving your pressure point up and down the curve you can alter its shape to give more curvature to whatever part you want. For the image in your post, it looks like you’d want to push/flex the batten about 2/3 of the way down.

View TobiasZA's profile

TobiasZA

131 posts in 225 days


#11 posted 04-05-2014 06:29 AM

Hi Paul, another way is to take a narrow strip of wood or plywood, say about at 1/8th of an inch thick s little longer than the part that you are copying. bend it to the shape that you require and lock it in place with a few brads.
Cheers
Tobias

View Purrmaster's profile

Purrmaster

800 posts in 779 days


#12 posted 04-05-2014 07:05 AM

So, basically, rip a thin strip and bend it between the two points to get a curve?

View TobiasZA's profile

TobiasZA

131 posts in 225 days


#13 posted 04-05-2014 07:11 AM

Yup. You got it. costs nothing.
Cheers
Tobias

View Monte Pittman's profile

Monte Pittman

14575 posts in 1025 days


#14 posted 04-05-2014 07:12 AM

Ok, you have the 2×4. Mark mark the points that you have to be. These are the top and bottom, and the front face where it says that you need to be flat. Draw straight lines initially to connect these points. Then the two parts that curve, you start flexing with your pencil to pass the “eye” test. As long as you start and stop where you should, you should easily be able to draw your curves in.

-- Mother Nature created it, I just assemble it.

View GaryW's profile

GaryW

124 posts in 1150 days


#15 posted 04-05-2014 08:56 AM

Look at your drawing. Start from the floor. Pick a side to be the front of the leg. From the front side measure 2” and mark it (tick 1). From the floor measure up 13.25”. Mark it (Tick 2). Measure up from tick 2 6.5” and mark it (Tick 3). Now on the top end measure 2” from the front, call it tick 4. Note that between tick 2-3 the front side remains flat. Use a wooden yard stick and ark it to pass from Tick 1 to 4, so that the ark passes over ticks 2 & 3.
Try drilling and using pegs at ticks 1 & 4. Bend the yard stick out past ticks 2&3 and place a peg between the yard stick and the front egde at the center of the 6.5 flat spot. What say ye to that ?

-- GaryW, Edgefield SC, Too old to start over, can't remember why...

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