I never thought about the compression of the conveyor before. Do you think that has anything to do with why if I place multiple narrow boards on the conveyor side by side, the ones closer to the motor side will bare the weight and the ones on the other side will sometimes slip or just not sand. I always see people do it on videos, but when I try it I never get it to work accurately. I've checked that the drum is parallel several times and it appears to be correct.

.................. John D....................