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A Peruvian Walnut Cradle #4: Lessons Learned (what not to do next time)

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Blog entry by jusfine posted 990 days ago 4006 reads 0 times favorited 5 comments Add to Favorites Watch
« Part 3: We have the pieces, let's put it all together! Part 4 of A Peruvian Walnut Cradle series no next part

It was enjoyable building the cradle, but there were a few things that caused me some grief and hopefully this will help someone else avoid the same mistakes.

I used Peruvian Walnut and thicknessed it to 7/8”.
The rockers were made from Tigerwood (Congolo Alves) and were finished at 1 1/4” thick.
Length of this cradle was 39”, width was 16”.

If you require any other measurements, let me know and I can get them (I know the owner).

Here is the PDF from Leigh which I found later in the process, and the key points for me.

Cutting the dovetails required an additional bevel on the ends of 1.5 degrees to close the joints.

Compound Dovetails on the Leigh jig can be accomplished, but you need to angle the lumber away from the jig by 1.5 degrees when cutting the tails. It requires building an angled jig to do so.

In addition to that, the inside of the tails need to be beveled at about 1.5 degrees to close the joint. I did mine with a hand plane as the pieces were too large to manage on the table saw.

As I mentioned earlier, I really don’t understand why some of these angles are there, but it does work and inside of the cradle is 90 degrees.

The other thing I learned was that a rocker with a gentle curve rocks faster than one with a more pronounced curve. You may see when you look at my photo of the rockers fitted to the bottom, that they are not the same as what I ended up with.

Upon cutting them out, I found they rocked much too quickly side to side, and when I increased the curve, they slowed down.

That doesn’t make any sense to me either, but it works.

I think I could build another one now, and it would be quicker and not as difficult to struggle through, and the most important thing was I learned how to use my Leigh jig to build compound dovetail joints.

Thanks for following my journey!

Life is Good!

-- Randy "You are judged as much by the questions you ask as the answers you give..."



5 comments so far

View mafe's profile

mafe

9413 posts in 1675 days


#1 posted 988 days ago

Life is wonderful!
Thank you for sharing us this with us.
Best thoughts,
Mads

-- Mad F, the fanatical rhykenologist and vintage architect. Democraticwoodworking.

View jusfine's profile

jusfine

2280 posts in 1511 days


#2 posted 988 days ago

Thanks Mads, glad you enjoyed it!

All the Best!

-- Randy "You are judged as much by the questions you ask as the answers you give..."

View mafe's profile

mafe

9413 posts in 1675 days


#3 posted 988 days ago

I do not understand the 1,5 degree also, I would think it should be the degree of the sides and they seem more than 1,5 3-4 or so…
Smiles,
Mads

-- Mad F, the fanatical rhykenologist and vintage architect. Democraticwoodworking.

View Lee Barker's profile

Lee Barker

2163 posts in 1436 days


#4 posted 922 days ago

Fascinating. Thanks for sharing the location of the speedbumps and how you dealt with them!

Kindly,

Lee

-- "...in his brain, which is as dry as the remainder biscuit after a voyage, he hath strange places cramm'd with observation, the which he vents in mangled forms." --Shakespeare, "As You Like It"

View RGtools's profile

RGtools

3299 posts in 1240 days


#5 posted 916 days ago

That’s interesting about the rocking effect. I can’t quite wrap my brain around it other than the movement required to offset the center of gravity would need to be larger…

Some things are so counter intuitive.

-- Make furniture that lasts as long as the tree - Ryan

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