I am having a problem with the new Delta 12 1/2″ Portable Planer that I recently purchased.   The planer feeds the stock across the knives in 2″ steps (i.e. feed, stop, resume), leaving marks on the surface of the wood that stretches the width of the stock, with a slight depression.   The problem occurs irrespective of the amount of material being removed… in fact, the problem occurs even when only the rollers contact the surface of the wood and the knives are not removing any material.  Has anyone had a similar experience?  

I have cleaned the feed rollers, rechecked the infeed and outfeed tables for level, checked the belt condition and tension, and examined the feed roller gears for missing teeth.   Everything seems good.  There is some slight scaring on the infeed roller; however, the problem occurs even when that area is avoided.