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Thread: Warped lid
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29th April 2019, 09:35 AM #1New Member
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Warped lid
Hey guys
I put the finishing touches on my first ever box yesterday. I went out to the Workshop this morning and found the lid has bowed up in the space of 12 hours
Timber is ironbark out of the firewood pile finished with raw linseed oil.
What could have caused this and is there any way to avoid it?
Cheers blokes
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29th April 2019 09:35 AM # ADSGoogle Adsense Advertisement
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29th April 2019, 01:51 PM #2
I don't have the answer but it's a real shame as it looks good with the resin in the lid.
Dallas
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29th April 2019, 03:09 PM #3
Hi and welcome to the Forum,
Did you apply finish to both sides of the timber?
Maybe the timber was not dry enough or the ambient humidity too high.
It may have done better to dry with the lid open.
Just some thoughts
RegardsHugh
Enough is enough, more than enough is too much.
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30th April 2019, 04:46 AM #4GOLD MEMBER
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Any number of things, ambient humidity, time between slicing and dicing, ie wood not fully dry from wood pile (re-iterating Dike's comments). Maybe something as simple too much finish one side.
I assume it was machined dead flat and remained that way after the epoxy pour yes?
I had the same problem over the weekend, I had a piece of machined decking, 6mm thin and had been sitting on a shelf for over a year now. I made a test box using my finger joint jig and glued it on. it was the straightest lid I had seen. then I separated the lid from the carcass, and within a few hours, boom, the corners curled up. It was blue gum and damn site stronger than the European pine I was using as the box carcass. and I'm scratching my head also but putting it down to ambient moisture.
I know that some timbers when machined take a few hours to re-settle (some it's instantaneous), ie the material releases tension that the thicker piece had under control with opposing forces, and once you trim it down, it begins to warp. mine had been milled over a year ago and was dead flat, now its cupped.
try moving it indoors, and see what happens that will be a good indicator as to whether it is humidity or not. But interested to hear others thoughts also.
Great job on the epoxy by the way.
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30th April 2019, 09:45 AM #5New Member
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Cheers guys I’m happy with the way it’s turned out!
Yep was dead flat after I went over it with the router in a sled.
I’m thinking you’re right, it may have not been dry enough yet as it’s only been in the workshop for 6 months or so however I went out the shop this morning and it’s flattened itself out again? Fine by me haha
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