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Avoid Twisted Doors in Your Furniture Projectscomments (3) August 29th, 2012 in blogs
When frame-and-panel cabinet doors wind up twisted after glue-up, the cause can be traced back to one of three culprits: stock, joinery, or clamping.
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Start by choosing stock for the frames that has reasonably straight grain, and make sure you let it acclimate to the humidity in your shop for a few days before milling it. Properly dimensioned and seasoned stock is critical to making straight frames for doors, so be sure the workpieces have faces that are parallel and edges that are square.
Miscut joinery also causes doors to twist. The tenon cheeks must be parallel with the rails, and the mortise walls must be parallel with the stiles for a door to be flat, so check that your machinery and fences are properly set. Once you've cut the mortises and tenons, you can check for twist by dry-fitting the door and laying a ruler or straightedge on edge across the door in a couple of spots. Or you can lay the door on a tablesaw to see if opposite corners rock. If a corner is high, you can adjust the fit by shaving a bit from the tenon cheek on the side of the frame opposite to the high spot. That should bring the corner of the stile down a little and flatten out the door.
If the joinery and the dry-fit are OK, then your clamps could be pulling the frame out of square. Make sure you keep the clamps parallel and try resting them on a flat surface, like a tablesaw, during glue-up.
If you've checked all of those things and the doors still rock slightly after glue-up, consider planing the high corners from the show side of the door until the whole front of the frame is dead-flat.
Solid Tips for Dead-Flat Doors
Learn how to mill, cut, and fit fine-tuned frame-and-panel doors with Fine Woodworking art director Michael Pekovich.
posted in: blogs, how to, frame and panel, Becksvoort, doors, cabinet doors
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