I’m using a brand new Porter-Cable 2 ¼ HP router (model 891) mounted in a table. For a bit I’m using an Amana Tool 46106 1/2" up-cut spiral flute carbide bit. I’m cutting a ½” wide 3/16” deep channel length wise in a ¾” thick 4” wide 5’ long poplar board. I’m running the board with a power stock feeder at 15 feet per minuet. The router motor (not the bit) is slipping up word in it’s base I can see black rub marks on the side of the router motor. And the channel it is cutting ends up being not only deeper but wider then the ½” bit. Do I need to purchase a better router, If so what would you suggest?