Hawk Posted December 1, 2015 Report Share Posted December 1, 2015 Heres the problem. I usally work with 1/4" wood. Some of the hard maple I recently got has a slight cup in it. Not much, if you lay the board down the middle of the board is about a 1/4" higher than the edges, the board is 11" wide. Is there a way to flatten the board, and will that method work on all wood varities? Chris Quote Link to comment Share on other sites More sharing options...
LarryEA Posted December 1, 2015 Report Share Posted December 1, 2015 We bantered this over a few months ago. Don't remember if there was a real cure or panacia. I was told to use a blow dryer on the conxex side. If you take it out...WILL IT COME BACK? Quote Link to comment Share on other sites More sharing options...
Gordster Posted December 1, 2015 Report Share Posted December 1, 2015 I had some luck by wetting it, not sopping wet ,and lay it on flat surface belly side up and put some weight on it for some time...I usually leave it over night depending on size. Doesn't always work,but other times is the right cure Quote Link to comment Share on other sites More sharing options...
rjones Posted December 1, 2015 Report Share Posted December 1, 2015 I had some luck by wetting it, not sopping wet ,and lay it on flat surface belly side up and put some weight on it for some time...I usually leave it over night depending on size. Doesn't always work,but other times is the right cure I have used a simaliar method setting the wood with the bulge up on a flat surface placing a damp towel over the entire piece and letting it "cook" for a few hours. I usually check on it every 45 minutes or so. If you leave it too long it can/will cause other warping problems. Quote Link to comment Share on other sites More sharing options...
redwine Posted December 1, 2015 Report Share Posted December 1, 2015 1/4 inch wood of any species is the worst for cupping. The way you stated you are like I am, do not have a bandsaw or a planer to resaw and surface the wood. In that case I would purchase the wood in 3" width and glue them up alternating the end grain to mostly end the cupping. This is a lot of work and time consuming so you might try ordering from a wood mill that would quarter saw the wood for you and that will take care of the cupping. I have not had any luck with wetting the board and putting weight on it as it resumes the cup when dry. I usually stack all of the wood when I receive it and put spacers between each layer and place weights on the top and leave it for 2 weeks or more, even than some will cup and even twist! I am still learning about wood and how it acts here in southern NM although we have very low humidity in the spring and summer but wood still does strange things! Redwine Quote Link to comment Share on other sites More sharing options...
LarryEA Posted December 2, 2015 Report Share Posted December 2, 2015 cupping question Started by gator, Feb 24, 2015 10:13 PM A little discussion here.... do a search in General Scroll Sawing for cupping Quote Link to comment Share on other sites More sharing options...
amazingkevin Posted December 2, 2015 Report Share Posted December 2, 2015 cupping question Quote Link to comment Share on other sites More sharing options...
Pinecone Posted December 2, 2015 Report Share Posted December 2, 2015 I had the same problem, I turned the cupped side up and held it over my wood heater in my shop for 3-4 minutes and let sit on my workbench with cup side down and it straightened out. You might have to repeat the heating process a couple of times. Quote Link to comment Share on other sites More sharing options...
kywoodmaster Posted December 2, 2015 Report Share Posted December 2, 2015 Best way that i have found is steam the board, lay on flat surface with the crowned side up, weight for a day or 2, when flat rip into 2.5 to 3 inch strips then glue up alternating the grains. Quote Link to comment Share on other sites More sharing options...
grampa Posted December 2, 2015 Report Share Posted December 2, 2015 My x wife was a bit warped and found out a good crack with a spade did the trick.......... Quote Link to comment Share on other sites More sharing options...
Rob Roy Posted December 2, 2015 Report Share Posted December 2, 2015 My x wife was a bit warped and found out a good crack with a spade did the trick.......... Paul, I'm laughing cos the wife ain't looking Quote Link to comment Share on other sites More sharing options...
kywoodmaster Posted December 3, 2015 Report Share Posted December 3, 2015 My x wife was a bit warped and found out a good crack with a spade did the trick.......... Wish I had tried that. Quote Link to comment Share on other sites More sharing options...
heppnerguy Posted December 3, 2015 Report Share Posted December 3, 2015 My x wife was a bit warped and found out a good crack with a spade did the trick.......... Paul, You better hope that your wife does not see your post. as getting out of the hole you just dug for yourself, may very well NOT be worth the smiles you achieved with it. I hope it is not too cold 'outside' where you live..Nights are very long when it is Dick heppnerguy Quote Link to comment Share on other sites More sharing options...
.thumb.jpg.95d348aa76923344a5cab534cc1b3bc1.jpg)
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.