I've searched the forum and can't find this issue. I also can't find anything but extruder skipping when I search for this problem. I don't know how to explain this. I have a rigidbot and I just upgraded to the E3d v6. did a small little test print and it looked a little sloppy, so I figure the next day, I'll just calibrate the extruder. Well I did this, and the number for steps was really close, I changed it anyway so it would be perfect. All I am seeing is this repetitive pattern throughout my print and I can tell that it is synchronized with when my extruder stepper is pushing out filament. I've never had this issue before swapping hot ends. Anyone have any idea on how to fix this?