Printed this cylinder as part of a larger project and there's a horizontal line that runs up most of the part. Not bad enough to scrap the project but I'm curious if anyone can explain what causes this. Using an Ender 3 printing PLA, Cura slicer.
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You can also look into a setting, I think it's called coasting. It will reduce the amount of plastic extruded towards the end of the layer to reduce the seam, but keep in mind this will look better but probably have less strength at this point
I highly suggest a few YouTubers that go into things like this, like makers muse and teaching tech