[Woodworkers] Christmas present help needed!!

[Jason Beam]

Did you leave the flat panel on a solid surface without equal airflow on 
both large faces?

I did that once to some cherry panels - and got me a Pringle the next day

Jason Beam
Sacramento, CA

On 12/17/2017 11:13 AM, Chuck Steger via Woodworkers wrote:
>
> A little long but please read as I need help!
>
> I’m making a photo board for my granddaughter (believe it or not they 
> are actually printing pictures and the Polaroid is making a comeback). 
> She likes rustic so I was going to make it out of pine (knots and all) 
> and put a barn wood finish on it. Since it was going to be rustic, I 
> figured I could skip a milling step and purchase 1x4 boards at Lowe’s. 
> Most were badly warped but I found 3 - 10’ boards that were relatively 
> straight. I thought that since they acclimated in the store, they 
> should be good to go. Plus I was going to chop up into 2’ lengths so I 
> could manage the warp. I set them aside in my climate controlled shop 
> and went to finish the concrete truck for my grandson. When I went to 
> retrieve the boards, they had warped badly. I knew better but I used 
> them thinking I could force them straight at glue up. When I went to 
> clamp them up, my heart-of-hearts knew it wasn’t going to work because 
> they were warping at glue up. I had gone this far so I glued up, 
> clamped down to a flat work bench and hoped for the best. Sure enough, 
> when I removed the clamps, the panel was badly warped (unfortunately, 
> I was not surprised).
>
> I realized I should have done what I planned to do in the first place 
> and go get 2x4’s so I could mill the warp out. I got pretty straight 
> 2x4’s and chopped into 2’ sections and ,milled down to 1 ¼”. I 
> stickered on my bench and let acclimate to shop for a day. Encouraging 
> because as you looked at the stickered stack, they did not appear to 
> be warping at all. So next day I milled down to just under 7/8” and 
> stickered again overnight. Again stack looked good so I milled to 
> final thickness of ¾’. As I was gluing up, I was very encouraged as 
> the glue up was flat. No need to clamp to bench (I did anyway) but was 
> very encouraged. Yesterday morning I unclamped and held my breath but, 
> hooray, a flat panel. I sanded panel to remove glue marks and set 
> aside to practice texturing sample boards for the barn wood finish 
> (still nice and flat). This morning, I went into the shop and the 
> panel was warped!! As I write this, I clamped the board flat to my 
> bench and started to bring the temperature up in my shop. If I’m not 
> working on anything, when I leave the shop for the night, I hold temp 
> to 50 degrees but if I’m working on something, I hold temp to 61. Why 
> 61? Because I bring up temp in 3 degree increments to get to 70. Why 3 
> degrees? I don’t know, I just do.
>
> So I have questions: What happened? Is it the temperature fluctuations 
> (and does 9 degrees really make a difference in warping)? But most 
> importantly, what do I do now? I have less than a week to finish. I 
> could do again with new 2x4’s but I’m not comfortable I wouldn’t have 
> the same issue. As I send this I’m going back out to unclamp from the 
> bench but I don’t expect it to stay flat.
>
> Chuck
>
>
>
> _______________________________________________
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