To expand on George a bit. From your description I can envision you
applying fairly hard pressure for the full length of an uneven board. You
might actually be bending part of the board down onto the table and cutters.
This can make bad worse because by bending the board you can actually cut
into areas that are already low, as well as the high spots.

Try making you first pass or two with just enough down pressure to glide the
board across table and knives. You will get hit and miss planing that
should improve with subsequent passes. Keep the blades adjustments shallow
so each pass shaves, not cuts (1/32" suggested in previous post is good).
If you try to go deeper and push too hard it will get worse fast.

As big and noisy as the jointer is, it is a finesse tool. Don't try to
manhandle it.


"George" george@least wrote in message
...
That's right. Now, are you primed for failure because you don't sight the
board and take off the worst first?

Since your results are inconsistent, it doesn't sound as if the machine's
improperly set.

"