gator Posted February 25, 2015 Report Share Posted February 25, 2015 okay guys and gals .planed some dry wood 3/4 to 1/2" and left sittin over night. cupped real bad. any tricks to stop this are fix it after the fact? AlfrediaMum 1 Quote Link to comment Share on other sites More sharing options...
dgman Posted February 25, 2015 Report Share Posted February 25, 2015 Don't let it sit! Two tricks that will help. First plane equal amounts on each side. Flip the wood over after each pass. This keeps the moisture level equal on both sides. Second, don't set the boards flat on a serface or floor. If you are planning several boards, stack with stickers or wood spacers in between each board. This allows moisture to circulate equally around the boards. If your planing just one or two boards, lean them against a wall or your work bench to allow for air circulation around the entire board. This should help with cupping Scrolling Steve 1 Quote Link to comment Share on other sites More sharing options...
amazingkevin Posted February 25, 2015 Report Share Posted February 25, 2015 Great tips and tricks ,Thanks!!! Quote Link to comment Share on other sites More sharing options...
Multifasited Posted February 25, 2015 Report Share Posted February 25, 2015 It's all moisture as above ,stated ,look at the end grain will give you the indication of which way the curves are are going to be the natural way it will cup,even flat wood will cup if moisture is present on on side or the other from air vents etc when complete helps to seal both side and ends .If you want to see dramatic effect bring hoe a new sheet of 1/2 plywood and lay in your front yard in the sun for a couple hours and you are likely to have a potatoe chip 4x8' Quote Link to comment Share on other sites More sharing options...
heppnerguy Posted February 25, 2015 Report Share Posted February 25, 2015 Hey great question... the answers were helpful to me too. I guess I never stopped to figure out why they put spacers between the board when the are drying. Now I am one more tiny step toward being smart and I always wanted to be that Dick heppnerguy Scrolling Steve 1 Quote Link to comment Share on other sites More sharing options...
Multifasited Posted February 25, 2015 Report Share Posted February 25, 2015 I seal mine after i cut into sizes and shrink wrap and keep out of the sun ,resaw is a totally different stickes flat and weight and wait plane stick and weight and wait 1 sand and seal ! Quote Link to comment Share on other sites More sharing options...
Rob Roy Posted February 25, 2015 Report Share Posted February 25, 2015 (edited) okay guys and gals .planed some dry wood 3/4 to 1/2" and left sittin over night. cupped real bad. any tricks to stop this are fix it after the fact? Hi Gator, Dan's information is correct. Stand the board on end. One of the reasons for it cupping is, when you lay it on a flat surface air can't circulate under the timber, hence it cups. That's why the timber you see in the lumber yard is stickered, so that air can circulate all around the timber. One other reason is the board may have been flat sawn, if it had been quarter sawn it would not cup. It could also have been badly kilned. Hope this helps Gator as I do not profess to be a technical writer, just what I remember from my apprentice days at college, hundreds of years ago. . Rob Roy. Edited February 25, 2015 by Rob Roy dgman 1 Quote Link to comment Share on other sites More sharing options...
Doug Posted February 25, 2015 Report Share Posted February 25, 2015 I do the same as Dan - have not had a problem yet. Quote Link to comment Share on other sites More sharing options...
ike Posted February 25, 2015 Report Share Posted February 25, 2015 I usually plain my wood when the moisture of the wood is around 6 to 8 % then stack it flat in my wood shed over the klast 3 years i have only had one 1/4 thick board warp. you can use a moisture Gage or there is a website . just Google ( lumber weight calculator ike) Quote Link to comment Share on other sites More sharing options...
gator Posted February 25, 2015 Author Report Share Posted February 25, 2015 thanks forthe info guys i apperciate it Quote Link to comment Share on other sites More sharing options...
DonR Posted February 25, 2015 Report Share Posted February 25, 2015 This may help you http://www.ocoochhardwoods.com/care_of_thin_wood.php Don R vykus 1 Quote Link to comment Share on other sites More sharing options...
LarryEA Posted February 25, 2015 Report Share Posted February 25, 2015 thanks forthe info guys i apperciate it Best trick is to take a heat gun and heat the cupped side and watch the board flatten out as you do this. Quote Link to comment Share on other sites More sharing options...
heppnerguy Posted February 25, 2015 Report Share Posted February 25, 2015 Best trick is to take a heat gun and heat the cupped side and watch the board flatten out as you do this. A little bit of my brilliance come into play here, once more..........Which is considered the 'cupped side' ? With the board laying with on a surface does it sit like a rocking chair rocker or it the two sides laying against the flat surface with the hump side up ? Dick heppnerguy LarryEA 1 Quote Link to comment Share on other sites More sharing options...
LarryEA Posted February 25, 2015 Report Share Posted February 25, 2015 A little bit of my brilliance come into play here, once more..........Which is considered the 'cupped side' ? With the board laying with on a surface does it sit like a rocking chair rocker or it the two sides laying against the flat surface with the hump side up ? Dick heppnerguy You heat the concave side,,, lay it down so it rocks... start in the center and work toward the outside back and forth LOL If it gets worst, turn it over Quote Link to comment Share on other sites More sharing options...
heppnerguy Posted February 26, 2015 Report Share Posted February 26, 2015 Thank you I will have to give this a try. Funny thing is, about an hour ago I went to my wood supply to pick a piece of wood to cut my next project and low and behold, The one that caught my eye was cupped and I immediately thought about this post. Because I had not yet seen your reply,Larry, I reflected on my question. Now I can go and give the idea a try. I will let you know, if I am successful. Dick heppnerguy LarryEA 1 Quote Link to comment Share on other sites More sharing options...
LarryEA Posted February 26, 2015 Report Share Posted February 26, 2015 I'll stay here until I hear from you Quote Link to comment Share on other sites More sharing options...
Scrappile Posted February 26, 2015 Report Share Posted February 26, 2015 Thanks for a great thread. Lots of good info here. I was looking at some thin wood at the HD yesterday, and it was all pretty "cupped". I passed on it and some of the popular was really pretty stuff. I may have to rethink a couple of the prettier pieces. Is there a chance it would crack from using a heat gun? Like drying it to quickly with the heat? Quote Link to comment Share on other sites More sharing options...
gator Posted February 26, 2015 Author Report Share Posted February 26, 2015 this turned out better than i thought.thanks for teacing a old dog a new trick . this is one of a milion reason why you guys rock Quote Link to comment Share on other sites More sharing options...
LarryEA Posted February 26, 2015 Report Share Posted February 26, 2015 Thanks for a great thread. Lots of good info here. I was looking at some thin wood at the HD yesterday, and it was all pretty "cupped". I passed on it and some of the popular was really pretty stuff. I may have to rethink a couple of the prettier pieces. Is there a chance it would crack from using a heat gun? Like drying it to quickly with the heat? Of course!!!!!!you can dry it too quick. You don't want to burn it (maybe late) Slow is good ...practice Quote Link to comment Share on other sites More sharing options...
LarryEA Posted February 27, 2015 Report Share Posted February 27, 2015 Hello Dick, what's the verdict? I gotta go to bed soon. Thank you I will have to give this a try. Funny thing is, about an hour ago I went to my wood supply to pick a piece of wood to cut my next project and low and behold, The one that caught my eye was cupped and I immediately thought about this post. Because I had not yet seen your reply,Larry, I reflected on my question. Now I can go and give the idea a try. I will let you know, if I am successful. Dick heppnerguy Quote Link to comment Share on other sites More sharing options...
LarryEA Posted February 27, 2015 Report Share Posted February 27, 2015 this turned out better than i thought.thanks for teacing a old dog a new trick . this is one of a milion reason why you guys rock OK Texan, what method did you use? Quote Link to comment Share on other sites More sharing options...
gator Posted February 27, 2015 Author Report Share Posted February 27, 2015 i did this weeks ago just figured when it happen again what are some things i can do Quote Link to comment Share on other sites More sharing options...
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