On 3/10/2012 6:55 PM, Ralph Compton wrote:
....

It seems to me that the blades might be bouncing the board because of
the cupping. The worst board, cupping-wise, has about 1/8 inch in the
middle of the 10" width.

The planer won't do any good on cupping anyway; the feed roller will
simply press the board flat, run it under the cutterhead and out it will
come recupped when the pressure is removed.

If you're trying to remove cupping, you need to surface a single face
first before the planer. Jointer or handplane is the way to accomplish
that.

As for the noise and apparent lack of sizable cuttings, make sure the
knives are indeed installed correctly (both orientation and depth)

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