Check the whole path of the filament, or maybe rotate the part before printing. Sometimes a combination of factors can cause just enough friction to under-extrude in just parts of a print. I sometimes get it when the filament roll rubs on the holder. This looks like it could be that it’s doing a fast bit while twisting the Bowden tube.
Check the whole path of the filament, or maybe rotate the part before printing. Sometimes a combination of factors can cause just enough friction to under-extrude in just parts of a print. I sometimes get it when the filament roll rubs on the holder. This looks like it could be that it’s doing a fast bit while twisting the Bowden tube.