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Cupping panels

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Forum topic by pyromedic602 posted 2057 days ago 806 views 0 times favorited 3 replies Add to Favorites Watch
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pyromedic602

164 posts in 2332 days


2057 days ago

Topic tags/keywords: question

I am sure that you all have answered this question many times but please bear with me. I have glued up several panels for projects and have always had difficulty with the pannels trying to cup. I have tried cutting boards to 3-4 inch withs before gluing and flipping the end grain to try an equalize/relieve the stress but I always get some cupping. I also try to not put to much clamping pressure on boards Just enough to get a smal amount of squeeze out. What am I doing wrong or what do I need to do in addition to ensure that my panels are flat when I take them out of the clamps.

-- Pyromedic602, free wood is always good wood


3 replies so far

View Catspaw's profile

Catspaw

236 posts in 2399 days


#1 posted 2057 days ago

If I glue up a solid wood panel I always glue up hit and miss planed material. After it has done what it wants to do, I plane it to thickness. If your planer isn’t wide enough, glue up sections, then plane, then glue up final, deal with what’s left. Or find a woodshop with a wide planer.

-- arborial reconfiguration specialist

View Thos. Angle's profile

Thos. Angle

4435 posts in 2546 days


#2 posted 2057 days ago

Check your saw and jointer for square. I have good luck hand planeing the adjoining edges at the same time. I also always use cauls over the top and bottom of the panel to keep it flat.

-- Thos. Angle, Jordan Valley, Oregon

View rhchampagne's profile

rhchampagne

8 posts in 2060 days


#3 posted 2054 days ago

I agree, after you joint the edge, is it square to the face? Are the faces of the panels flat? Even if you clamp with cauls if your edges or faces are not square you can get cupping.

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