Hello, I had a problem here, as in the attached photos. At the corners too much plastic, eventually grows up hill, for it clings to the head, skipped steps.
The extruder is calibrated.
I use
Nozzle 0.45 mm
Layer 0.3 mm
Sli3r 0.7.1.
I'm still a bit new to this, but to my eye that looks more like warping than too much plastic being extruded. What kind of plastic are you using? Do you have a heated bed? If so, what is the bed temp set to? What surface are you printing on? Do you have a fan? What speed are you printing at?