robjeffking Posted October 2, 2011 Report Share Posted October 2, 2011 Well I was glueing up some 9" panels 4 to be exact 2 at a time and they laid nice and flat on my pool table(My work table is a old pool table nice and flat), I used pocket screws every 5" total length 50" and now I checked on them 4 hrs later and 1 of them is showing signs of bowing I have it weighted down with cast iron now. I dont know if this will reverse the bow, what did I do wrong? Quote Link to comment Share on other sites More sharing options...
robjeffking Posted October 2, 2011 Author Report Share Posted October 2, 2011 The grain is alternating and the humidty is 26% Quote Link to comment Share on other sites More sharing options...
dwacker Posted October 3, 2011 Report Share Posted October 3, 2011 If you left them laying flat on the table that is normal. Lean them against the wall next time. Don Quote Link to comment Share on other sites More sharing options...
robjeffking Posted October 3, 2011 Author Report Share Posted October 3, 2011 I never would have guessed that I'll give it a try. Is their a easy way to explain how this process prevents warping? Quote Link to comment Share on other sites More sharing options...
dwacker Posted October 3, 2011 Report Share Posted October 3, 2011 I never would have guessed that I'll give it a try. Is their a easy way to explain how this process prevents warping? Although your wood seems dry to the touch its not. The moisture need to enter and escape equally. Not going to happen laying on the table. Don Quote Link to comment Share on other sites More sharing options...
Beechwood Chip Posted October 3, 2011 Report Share Posted October 3, 2011 Although your wood seems dry to the touch its not. The moisture need to enter and escape equally. Not going to happen laying on the table. Maybe even more so when lying on a nice, cool, slab of slate. Quote Link to comment Share on other sites More sharing options...
robjeffking Posted October 3, 2011 Author Report Share Posted October 3, 2011 So I now have all my pieces leaned up against the wall even the solid pieces is this the proper way? Quote Link to comment Share on other sites More sharing options...
dwacker Posted October 4, 2011 Report Share Posted October 4, 2011 So I now have all my pieces leaned up against the wall even the solid pieces is this the proper way? Yes never leave your wood on the workbench overnight, not even plywood. Even when you do large panel glue ups get them clamped and lean them against the wall. Don Quote Link to comment Share on other sites More sharing options...
robjeffking Posted October 6, 2011 Author Report Share Posted October 6, 2011 ok Thanks Don Quote Link to comment Share on other sites More sharing options...
Brutus Posted October 13, 2011 Report Share Posted October 13, 2011 That is good to know. I just got the go ahead on a contract to remake a bunch of table tops at a restaurant where all of the tops are bowing badly. I had never heard the importance of maintaining uniform airflow around a project; well now that I am typing this it makes way too much sense. Glad I joined here today. Quote Link to comment Share on other sites More sharing options...
PatrickHosey Posted October 29, 2011 Report Share Posted October 29, 2011 I have used pocket holes to glue up panels before. It didn't work out though because of the angle that the screw sits in and pulls the wood together at. Maybe that could also be a factor. I found that the top of the joint had less pressure than the bottom and that caused a bow. Quote Link to comment Share on other sites More sharing options...
dwacker Posted November 1, 2011 Report Share Posted November 1, 2011 I have used pocket holes to glue up panels before. It didn't work out though because of the angle that the screw sits in and pulls the wood together at. Maybe that could also be a factor. I found that the top of the joint had less pressure than the bottom and that caused a bow. Thats not the pocket screw its the jointing. I dont think pocket holes are really the right joinery for panel glue up but to each his own. Don Quote Link to comment Share on other sites More sharing options...
PatrickHosey Posted November 3, 2011 Report Share Posted November 3, 2011 i agree Quote Link to comment Share on other sites More sharing options...
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