Jointer issues - why can't I get straight boards? - Woodworking Talk - Woodworkers Forum
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post #1 of 4 Old 05-12-2008, 10:30 PM Thread Starter
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Question Jointer issues - why can't I get straight boards?

I have a 6 inch Rikon Jointer with a 46" bed. I have no problem with boardsabout 30" or less. However, when they they get longer, I end up with a bow. This is less pronouned with thicker stock. Can anyone help?
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post #2 of 4 Old 05-13-2008, 08:42 AM
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The jointer requires more technique than many power tools. Be sure it's setup properly...raise the infeed to the same level as the outfeed table and lay a straigtedge across in different locations and angles to be sure the tables are coplaner, then make sure the fence is flat and square to the tables. Wax the tables to reduce friction and slow rust.

To work a board, flatten a face first, put the flattened face against the fence to get a squared adjacent edge. I typically take light passes.

Take a look at this article by Tom Hintz for setup and technique tips:

Last edited by knotscott; 05-13-2008 at 08:48 AM.
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post #3 of 4 Old 05-13-2008, 12:14 PM Thread Starter
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Thanks. The article was good. The other advice is right on as well. I do have the jointer set up correctly, squared and waxed. Although the wax came after months of use without. What a difference!! I think the problem is too much downward pressure in the middle of the board during a cut. While trying to eliminate chatter, I may be pushing down too hard. Luckily, I've only wasted (practiced) with poplar so far.
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post #4 of 4 Old 05-14-2008, 08:52 AM
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Originally Posted by knotscott View Post be sure the tables are coplaner...
Scott: what means coplaner?

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