'Stuttering' - While feeding a board through the planer, the board pauses for a moment, the cutter blades dig a very fine notch on the board and then it starts feeding again, only to pause a few inches (or a foot or more) later and repeat. The distance between these 'stutters' isn't regular and are barely noticeable though obviously not disreable. Blades are recently sharpened. This started while planing hickory, taking off about 1/32" at a time, but also happens with pine which I ran as a test. Appreciate any guidance as to where I ought to look first.
Thanks