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Thread: Oregon table top warp
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21st November 2009, 01:04 PM #1
Oregon table top warp
I have been trying to do this coffee table since August I got so annoyed I just left it aside.
After sitting a heavy morta and pestle on it to fix a very bad cupping (it got rid of most of it) I found that one edge has decided to do the same.
Frustrated yes annoyed even phissed of as I know have a higher authority to contend with wants it NOW.
Choices are as I see them
1 Trim the edge back as far as I can
2 fit a farm under it glue and clamp 7.37pm Edit Yes a Farm would be good all that manure wold make it curl the other way for sure Should Frame
3 start again (on this note) I either locate some more Oregon or use Red Cedar for the top.
Ray
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21st November 2009, 02:10 PM #2SENIOR MEMBER
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The warp seems too large to just trim back. Since most of the problem is with one board I would consider sawing down the glue line or perhaps before the warp, and joining a more suitable board to the flat piece.
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21st November 2009, 02:48 PM #3
Rip the boards and joint / thickness again you may end up with 4 boards to edge join but you should be able to bring back to flat if you don't go too thin.
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BrettC
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22nd November 2009, 10:33 PM #4
I'd be tempted to just whack it on with plenty of buttons, it's amazing how tops settle............sometimes.
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22nd November 2009, 11:50 PM #5SENIOR MEMBER
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You are in big dodo as the higher authority wants it NOW...
You have 2 fast options and a third to keep you fit..:
1. Make a frame and apologise in full grovelling mode for bad table and promise to make a replacement as fast as all other jobs and real time permits. That should get you at least 12 months to do something.
2. Rip the two boards down the centre but not the current join. Join these two new half boards to the centre section and work from that point.
From the look of the pics the centre sections look ok once the two outer halves are removed. Putting the side pieces back on should remove that dainty curve that is there.
3. Leave it as is and just call it new modern art coffee table, then run.....
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23rd November 2009, 10:25 AM #6
What Cultana said!!!
As an addition to his #2 point, turn the two new boards over so the grain is opposite to the one next to it, eg unnu
Another option is to breadboard the ends.
Cheers & Good luck!
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23rd November 2009, 11:39 AM #7
Thanks all for the tips more Oregon on the way to make a frame as I had run out of long enough bit
thanks goes to Pat for the Oregon.
will post when completed.....I hope.
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30th November 2009, 11:36 AM #8
A good wetting clamped and has straightened up, cut the frame now its raining.
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30th November 2009, 04:18 PM #9
Right first photo tells the story the timber is a poor selection for a table top with regards to grain and there fore stress direction. Top should be selected from timber with the STRAIGHT grain running preferably vertical. True quarter sawn is best .
How do you fix it?
Resaw into a min of 4 boards more is better and reglue in a different order so tendency to cup will be reduced and at worst you will end up with micro corrugations rather than a wave like you have. Yes it will not look as good but it is not exactly looking too good right now either!
Also note that softwoods and Douglas Fir in particular with the grain aligned like it is here is very hard to produce a flat surface on by sanding as the alternate soft bands of timber sand more quickly than the hard one creating a washboard effect.
How to avoid in future?
1 Once timber has been thicknessed leave it to settle in your workshop flat and well ventilated on sawhorses or something for as long as possible I try to wait a month though longer is better.
2 Choose your timber more carefully
3 For situations where flatness is paramount use timbers and grain directions known for their stability and flatness
Constructing a piece of furniture with the intention of fighting or resisting timbers natural movement will always have a consequence and a negative one and is just plain poor wood working. In this case you might get away with it for a time but it is still bad practice.
Rgds
RossRoss"All government in essence," says Emerson, "is tyranny." It matters not whether it is government by divine right or majority rule. In every instance its aim is the absolute subordination of the individual.
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30th November 2009, 05:11 PM #10
Thanks for your in put all these things you said were consider with the timber available and what we were after discussed between 3 people LOML, Fletty who milled and cut and prepeared to dry assemble stage. The only regret is the thickness of the top could not be left at 40mm.
Not true regret leaving it in the house unfinished for so long. This weather doesn't help.
Ray
Ps I have in the years gone by seen very expensive wood all cut right glued right do exactly the same thing.
Could I have your view on that!!!
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4th December 2009, 04:37 PM #11
Things are moving along quite well hope to have photo's over the weekend.
Should have had the camera out when the man in business artier used his biscuit jointer for a few Z clip holes. Thanks Fletty
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