10:21AM | 05/26/03
Member Since: 05/25/03
1 lifetime posts
I recently purchased a Craftsman 6 1/2 Inch Planer/Joiner. However my boards are being cut deeper toward the middle that on the ends. Creates a slight bowl look when laid against a straight edge. I am sure it is my technique, but have been unable to figure it out. I am trying to Plane four pieces that are 24 inches long, so they can be matched to create a table top.

Mark Hammond

03:33PM | 05/26/03
Member Since: 05/09/01
246 lifetime posts
what you have (if it is not too severe) is called a spring joint. Meaning that when both edges are slightly lower in the center it will help hold a tighter joint than when both edges are perfectly straight. The difference can be clamped with bar clamps so the the edges are tight. Use whatever type of glue you want although carpenter's glue works fine, and let dry for twenty-four hours.
You may need to look at the jointer's adjustments as well. The rear or outfeed table needs to be at the same height as the blades when topped out. The front table needs to be set at whatever dimension you want to take off the edge, lower than the blades. I know it sounds confusing but it is really common sense. I hope this helps.....MJH
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