|Forum topic by LyttleBryan||posted 11-18-2013 05:23 PM||1540 views||2 times favorited||17 replies|
11-18-2013 05:23 PM
Everyone has something they just hate doing. For me, it’s edge gluing boards for panels. I know why I hate it. It’s because I’m terrible at it.
I’m working on Christmas presents. Making cheese trays for everyone since “wine and cheese” nights are a big thing right now. It’s basically a cutting board, only face grain instead of end grain. I’ve got a variety of species of wood that I’m splicing into maple for nice contrasts.
My problem is that whenever I go to glue up the boards, they cup on at least one side, if not both.
I’m using an assortment of clamps right now that include:
The boards have been run through the jointer and table saw. Comparing them against my machines square (one of those highly accurate ones) they appear square, but that’s to the naked eye. Sitting on the bench, as long as the long boards aren’t warped, they appear to make a nice seal.
I put them in the pipe clamps with clamps spaced every ~8” and then put cauls on each end that I clamp down with the F clamps. No matter what, after I apply even a little bit of pressure with my left hand (my far weaker hand) at least one of the boards in contact with the clamps will start to rise up and create a cup.
I created this highly technical diagram to explain the problem.
Things I’ve tried include:
I’m worried that it’s the pipe clamps. Look at the clamp it appears that there isn’t clamping surface touching all points on the boards, just the top. This acts to “tip the board over” if you will. This would be very disappointing as I can’t afford a thousand dollars in new wood clamps right now, which is what it seems it would cost.