
Originally Posted by
old goat
5 things. 1) Make sure your edges are perfect 90 degrees.
2) Use equal numbers of clamps above and below--I can't tell from the picture if you've done that. I know you have at least some clamps on both sides.
3) Don't over tighten. Tighten the clamps just enough to get glue squeeze out along the whole joint. Tighten all the clamps a little before you finish tightening any of them and alternate tightening clamps above and below the boards.
4) Use blocks between the clamp faces and the edges of the boards. The blocks should be the same thickness (or thinner) as the boards and centered. They will make sure the pressure from the clamps is applied straight through the center of the boards. Pipe clamps can distort especially with wide glue ups and apply force at a slight angle to the boards. (K Clamps are designed to apply the force straight through the boards but they're too expensive for my blood--I use pipe clamps like you.) Warning--it's hard to keep the blocks from falling out as you tighten the clamps.
5) Do the glue up in 2 parts. The clamps will distort less. I think you have 5 boards--glue up 3 and glue up 2 and then glue up the two assemblies to each other.
I have a big entertainment center maybe about the size of yours. Everything in it could be loaded into this new fangled thing I carry in my pocket, but don't let that stop you.
I love walnut.
I use a biscuit joiner for gluing up panels too. Not only does it keep the boards aligned so you don't have a lot of planing to do but it lets you get the boards aligned much faster and means you have less thing to think about as you position the clamps.
1. Edges were as close to a perfect 90 as I could get, but I did match rip the edges to joint them to account for any error here as well (i.e. rip left side of each board face up, rip right side of each board face down. Any error in setup angle would match like this \\ but it would be prone to slide under clamping pressure)
2. I had intended to, but one clamp wasn't opening wide enough for some damn reason. 4 under, 3 over, 3 cauls, and a couple right on the ends of the troublesome ones.
3. Progressively tightened and didn't go crazy. I didn't have blocks between the pipe clamps and the work and was afraid of damaging the work. Did have good squeeze out
4. 10-4, will use blocks for the next panel. Got enough hardwood scrap from the legs now.
5. Correct on the 5 boards here, next panel is only 4 boards. For some reason I though doing it in steps would introduce the potential to make things worse, that it would be harder to move pieces into position if I was trying to flex a 3 board panel and a 2 board panel into perfect alignment.

Originally Posted by
Flounder
DJ- that’s going to be an awesome looking cabinet. Sounds like a bit of hand work to get it smooth but it’ll all work out, I’ve been through these issues more than I should. Lots of great advice so far.
To me it sounds like the missing piece was starting at the jointer. The planer will keep the bows and twists in the wood while making sure the thickness is consistent. If one side was face jointed flat before running through the planer it would have removed those twists.
If you’re going to buy a tool to correct the issue and it’s a tool you’re likely to use in the future, a belt sander may be a good option. Have to be careful not to mess it all up but it can be done. Tool to prevent in the future would be a jointer, especially if you have a planer. The two go hand in hand. Opens up the ability to get rough cut lumber and make it perfect.
Yeah, a 12" jointer with a 84" bed and a 5000 sqft shop are on my dream list, but I'm not there yet. I have a face jointing sled for boards up to 4' long that I can shim a piece up and run it through the planer to remove twists and bows, but it wasn't going to handle 8'+ long boards.
I think my local store might rent a belt sander or a electric planer (that scares me in this use case). Any downside to just sticking with the random orbit, some 80 grit, and time?
I've concluded that DJSapp was never DJSapp, and Not DJSapp is also not DJSapp, so that means he's telling the truth now and he was lying before.
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