I've got another air dried slab I'm routing. I'm not sure what caused this issue. I know the board has a slight bow to it bit I clamped it down using my t-slot clamps but apparently the bottom line was still a touch bowed but the larger N & S makes no sense to me the sides routed fine but on the top & bottoms of the letters you can still see the steps from the roughing flat bottom toolpath.
Please let me know what caused this issue. I was using a 1" 90° v-bit
Thanks
Gary