Reply To: Board cupping and twist
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Hi Chai, I did a little research after posting this topic. In my case I was using 1 &1/2 inch stock, removing 1/2 inch to a final thickness of 1 inch. In my case, the wood most likely wasn’t completely dry. After removing 1/2 inch of thickness, the newly revealed surface was wetter than the outer surface which was exposed to the environment for longer. When wood dries, it contracts towards the face that is releasing more moisture. It seems one solution when reducing a boards thickness significantly is to leave on an extra 1/8th inch or so and let it dry and do its thing for a few days at least. After it finishes settling ( in my case it was cupping and twisting) then remove cup and twist and plane down to final thickness. It should remain stable at that point.