I am making a oak tabletop cabinet and have had no problems with the planer, in fact I just put new blades into it. The oak planed just fine but when I tried to plane some poplar it stopped up the dust system. I remember a friend of mine use to have problems with his system when ever he would plane pine. I finally finished what I was planing and cleaned up the mess, never had that problem before. Five boards, four about 5 1/2 across and one about 8" across. Any thoughts. I even hooked the machine directly to the dust system and still had the problem. Poplar is over five years old so it is dry.