I have made several panels for a book case using veneer that is just under 1/8 inch thick on one side and commercial veneer on the other side of a 1/4 inch plywood sheet that is 12 – 18 inches wide. Now the panels are cuping up toward the thicker veneer. I suppose using different thicknesses of veneer was a mistake. Is there any way to correct the cupping? I have thought about ripping a kerf on one side, flattening the pannel then squaring up the curf and placing a strip in the kerf. Does that make any sense?
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Replies
Stand the panel on edge raised off the floor and let it acclimate to the shop for a couple of days. Be sure air can get freely to both sides.
What is the panel going to be used for?
Ripping a kerf will not help. Take a look at the related thread below titled "Chessboard Warp". Nothing that has been suggested is going to salvage the job. In that case, the builder did not take into account that the wood will expand/contract so the contruction was not appropriate for the item.
just make new panels
is more than likely the best way to go and have no problems with it again
ron
warped veneered panel
The panels will be in a frame and panel construction.
Check out the latest post in "Chessboard Warp".
Equalize
You have to equalize the veneer on both sides or it will always be unstable. You might be able to force it into shape during assembly, but I can't garentee it will stay that way. You could take it to a pro cabinet shop and have them run it through a wide belt sander to take down the veneer on one side to around 1/16th. If the warp isn't severe the strength of the machine should be able to hold the panel flat as it runs through. Otherwise you could screw it to a support piece of MDF from beneath. This might be worth a shot, depending on the value of the veneer you are using.
Warped Vaneered panel
Thanks for your input. I have been thinking that I would try reducing the thickness with a belt sander and a course belt. I have tried wetting th cupped side but it comes back an I too am concerned with the panel breaking the frame that they go in at any of the extremes of moisture.
Rethink the approach?
Hi Howard.
1/8 veneer on 1/4 substrate... belt sander... course belt... I don't like the way this is going...
I think you may have lost the patient.
Tell us what your end objective is. What species are you working with? Maybe the forum can help you rethink an approach to this project.
Frank
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