Replies

1. 
   Clay | Apr 15, 2003 07:49am | #1

   Sure, that happens all the time.  The technical details are thus; the walnut has less stiffness than the oak and thus is sucked up into the planer knives slightly more.  This effect will be less dramatic when planing thicker lumber because the thicker lumber is less flexible and thus unable to arc up much in the space between the feed rollers.  Taking smaller bites will also tend to minimize this effect by giving the knives less bite with which to pull upward on the lumber.  Dull knives can also create the effect in another way by cutting into the softer walnut more deeply than they do in the harder oak.

   
   

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   Edited 4/15/2003 12:54:42 AM ET by Clay