I've just been making my first cuts on my recently finished CNC router. I cut a small table top earlier today, and had 3 small bumps in a profile cut (g-code attached). The timber is maple, I did 15 x 1.5mm passes and each pass had the bump in the same place. I'm confident there are no lost steps as the rest of the geometry was smooth. There is no uniformity to where these bumps are in relation to the rest of the geomtery, and I would expect if there was mechanical culprit for these bumps to be elsewhere in the toolpath. I've taken a close look at the g-code toolpath and this seems to be fine. I don't think there is any backlash, and the bump positions don't seem to be on curves. Any insight would be much appreciated!