Just started cutting some 3D stuff. The first piece came off with some weird lines in the cut where I expect smoothness. In vcarve all looks as expected, but the final cut has a sort of wave pattern. I'm guessing it is something in the hardware, but have no idea as to where to start looking for problems. I am also running Mach3.

Bit is a 1/8" ball nose carving bit.
Stepover of 5%
The lines that are visible in this cut run north/south, the toolpaths runs east/west. I tried rotating the toolpath 90deg, and the artifact lines also rotated, so they are always 90deg off from what the toolpath is.

Any ideas?

Attachment 283090