A: The accuracy of the extrusion amount directly affects the quality of the printed part, but most 3D printers don't have a system to detect whether the extrusion amount is correct or not. So when the extrusion volume is too high, too much plastic is extruded, which will cause the situation shown above. Same as under-extrusion, when this problem occurs, you should check if the wire diameter is correct, and if it is correct, you need to adjust the extrusion volume multiplier.