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17th August 2007, 11:07 AM #1
The Holy Grail? A zigzag rocker - WIP
Here are some pics of my zigzag rocker, made of blackwood with rock maple back-slats, mitre keys and heel blocks.
Photo 1. Cutting a 29.5° leg mitre.
Photo 2. Cutting the kerfs for the twin mitre-reinforcing keys using a tenoning jig.
Photo 3. Glueing up the rocker laminations. I used the same former as was used for my Maloof-style rocker, but I truncated the drooping rear end of the rockers.
Photo 4. The dry-assembled rocker.
Photo 5. Side view of the dry-assembled rocker. Note the maple heel blocks.
The ends of the rockers will be tapered, and all the edges rounded over. It was a big relief to find, when I dry-assembled the chair this morning, that the chair's balance point was roughly where I had predicted, and that the chair is comfortable to sit in. TurboCAD enabled me to fluke it again
The chair still needs a bit of work in the way of sanding, and gluing, screwing, and dowelling the seat/back assembly to the supporting Z frame.
Rocker
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17th August 2007, 11:26 AM #2
I was wondering how you were going to do it! Well done.
I admire the workmanship (as always), but somehow the angularity of the Z-chair put together with the curve of the rocker (and the shapliness of the back slats), just doesn't look quite right to me. I just can't come at the heel blocks squaring off the front of the rocker but leaving the back as a normal curve.
Perhaps if the arm were curved, the arm/leg joint were also curved or radiused, and the leg/rocker joint were more like the Maloof fairing, it would have more aesthetic unity (if you know what I mean).
But that is just me and the most important thing is that it is comfortable.Cheers
Jeremy
If it were done when 'tis done, then 'twere well it were done quickly
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17th August 2007, 11:28 AM #3
Fantastic, Rocker. Very innovative.
Can't wait to see the finished product.
Tex
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17th August 2007, 11:39 AM #4
I think you've gone stark raving bonkers!
No, in theory I love it to bits. The only negative for me is also the bottom "Z"bit. I'd love to see it just turn into the rocker without the straight.
No, I don't know how to make it work... that's your job Rocker!
I can't wait to see it finished.
cheers,
P
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17th August 2007, 12:10 PM #5
WOW!!!!!!!!!!!!!!!!!!!!!
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17th August 2007, 01:11 PM #6
I had a bit of a play with this idea when we raised it in the other thread. I was thinking of a more calligraphic 'Z', with more curves and a flowing structure.
Why have you gone with keyed splines here instead of the dominoes?Those are my principles, and if you don't like them . . . well, I have others.
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17th August 2007, 01:21 PM #7
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17th August 2007, 01:28 PM #8
Jmk,
I take your point that aesthetically it lacks unity, but maybe people could learn to live with it. I could make up some bs about the creative tension between the angularity and curves - but I won't.
Peter,
I racked my brain for a way of joining the legs directly to the rockers, but couldn't think of a way of doing it that would be structurally sound. I suppose that perhaps a bridle joint like that on Lignum's conoid chair might work. But I lack the ticker to attempt it. Probably that would require a very hard and strong wood for the rockers.
Rocker
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17th August 2007, 02:09 PM #9
Zenwood,
Your concept drawings look very good, but I think they would be very hard to execute. Perhaps you should have a go. Cutting mitres or bridle joints on curved workpieces would require some sophisticated jig building.
I thought I would use spline keys rather than locking tenons to produce a contrasting feature. Also the larger angle of the lower mitre makes the use of locking tenons less effective. There would not be much glue area on the tenon on the opposite side of the joint from which the tenon was inserted; and the locking pins would need to be very close together. The spline keys allow the pins to be much further apart.
Rocker
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17th August 2007, 03:08 PM #10
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17th August 2007, 03:34 PM #11.
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Rock the chair looks excelent, well done. And the bridle joint would be perfect. fter seeing all the furniture you make that joint would be easy for you to do.
And Zen, that second sketch is a cracker. That would look stunning as a rocking chair. Have a go and make it. Make it a WIP for all us to enjoy
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17th August 2007, 04:20 PM #12
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17th August 2007, 05:10 PM #13
What colour are you going to paint it?
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17th August 2007, 05:33 PM #14
Having never made a chair before, I think starting with this one could put me in a world of hurt.
The positioning of the chair over the curve of the rocker would be crucial to achieving balance. A scale model trial would definitely be in order. I think a full scale model in plywood would also be useful before attempting the real thing. Then there's the question of joinery. I'm pretty sure keyed mitres would be strong enough, but as Rocker pointed out, they'd be very awkward to cut.
Happy if someone else wants to have a go...hint, hint!Those are my principles, and if you don't like them . . . well, I have others.
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17th August 2007, 05:40 PM #15
Rocker, perhaps if you shortened the bottom sections of the Zed, to maybe half the distance from the front of the rockers, and curved their tops in such a way that it smooths the change from linear to curved? Maybe mirroring the curve of the rocker?
And, to add a bit of visual balance, add a similarly shaped fillet to the back half as well?
Just a thought... I hope you understand what I mean.
- Andy Mc
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