1

Hi, I have these marks in some of my layers and would like any ideas what maybe causing them.

appreciated.

2

Looks like under-extrusion. As to the cause… is the filament roll catching on anything?

3

Since we dont know what printer, software, or material you are using, we can only guess.

It appears to be happening at specific intervals, so its possible you should mess with your coast, wipe, and retraction settings.

Depending on your printer, you may need to update your temps, or run PID tuning.