Artifacts on outer wall

[user_3007024412]

So when printing a case for a Raspberry Pi, I get these weird horizontal artifacts along some printing layers on my outer walls (see attached photos).

It seems like this occurs primarily when the structure changes a bit, e.g. when a hole gets in the way.
I’ve checked my printing parameters and apparently all of the relevant ones like speed, flow, layer time remain constant over the whole print job.

Is anyone familiar with this issue?

The filament I’m using is PLA matte Ivory White on my P1S with AMS.

[Highpersonic]

@user_3007024412

I’ve checked my printing parameters and apparently all of the relevant ones like speed, flow, layer time remain constant over the whole print job.

Do you maybe have seam on scarf

or in filament setting

[user_3007024412]

Hi, thank you for your reply!
unfortunately no, in my case the settings i can change for seam look a little bit different. (see attached pic).

I have way less options to change it.

To meet the artifact issue I even tried a different layer height (went down from 0.2 → 0.1 mm), but this didn’t solve the problem…

[Lenyo]

Very similar to this issue:

Why is my simple box shifting in layer?

Well, you are on the right track. Situations like these rarely have a single cause. I often compare this hobby to baking rather than science because, like in baking, temperature, time, and humidity can have varying effects, even between events. I suggest doing a simple test. To save time, change the layer height to 0.28 to speed up the process. Then, enable the “silent” mode in the slicer settings to slow down all print head movements. While it’s true that this adjustment can be made in the spe…

See @Olias first post in there for a great guide on fixing it. PS: I suspect wet filament as it causes more filament to extrude than necessary due to the moisture boiling and pushing out extra filament (especially during travel) which presents as walls that look like this.

[user_3007024412]

Hi Lenyo, thanks for your reply — seems to be really the same issue! I’ll test it out in the next days…