Hello, everyone,
today I was printing an empty box, and I noticed that on one side of the box there are these defects.
The other three sides are perfect.
Can you tell what could be the cause?
Thank you
What filament you use ? I had defects like this only when i am printing faster than the filament is made for 
Hi, thank you for your response. I use bamboo lab pla BASIC filament, without going to touch any parameter
Ok, then check if all belts are fine ( right tension ) and calibrate after, then try again