A：1、Exhaustion of consumables

2、Wire bite problem occurs

3、Plugging

4、Extruder stepper motor drive overheating

During the print extrusion process, the stepper motor of the extruder keeps working. This may cause the driver chip to overheat, resulting in the stepper motor to stop working. To solve this problem, you need to add a more effective heat dissipation system on the driver chip.