here is a video of what is happening. Basically, there is a kind of involuntary movement of the extruder, at least a undesirable one. I think it’s probably my mistake in slic3r, but which one? Is it because I specified a Z lift variable in the extruder section? Or is it something else that found it’s way into the Gcode?
FYI I used to print this piece without this ever happening, but it was in ABS, and now it’s PLA . I probably did something wrong in Slic3r…
and the video: