My first thought would be something is loose. Wiggle the bit by hand to see if there are some loose bearings on the truck. Did the hole diameters turn out right?
Or maybe zoom in that area on your pattern or try "Toggle Non-endpoint".
You may have inadvertently left a stray node in your design.
Justin Pierce, aka spalted
*Pattern Editor (Probe) * Centerline * Dxf Import * STL Importer * Version 3 Standalone * Advanced 3D * Advanced 2D * Conforming Vectors * Rotary *C Machine *Rock Chuck
It may have been a stray node. I started from scratch with a new board on the computer and the blip disappeared.