Anycubic 4Max Extruder Stepper Motor Cooler NEMA 17

thingiverse

Anycubic 4Max owners know all about the extruder issues that plague my own machine. Initially, I suspected a loose tension spring, which was indeed the culprit behind many of my printing woes. However, even after adjusting it to perfection, long prints continued to exhibit clicking extruder behavior and overheating stepper motors. Investigations revealed a VREF reading of 0.86 volts, which is relatively low. Attempting to further reduce this voltage only exacerbated the issue, so I opted for an alternative solution: actively cooling the extruder stepper motor. I scoured Thingiverse for suitable mounting solutions but found nothing that fit the Nema 17 motor due to its unique configuration on the Anycubic 4Max. Undeterred, I decided to design my own model to address this problem. After testing, I'm pleased to report that underextrusion has not been an issue, and if it does arise in the future, I can simply increase the VREF since the motor is now actively cooled. To install this solution, print the provided model, attach a 40x40x10mm fan to the Nema 17 extruder motor, and connect it to the hot end's 12V power source. This setup should provide adequate cooling during extended printing sessions. Please note that this fix may not be a silver bullet for all Anycubic 4Max owners experiencing clicking issues, as other factors can contribute to this problem.