Extruder Upgrades

thingiverse

To enhance my QU-BD extruder's performance, I implemented several modifications based on a combination of parts. Firstly, I replaced the set screw with a Ball-nose Spring Plunger from Mcmaster.com (3408A98), ensuring a tight press on the filament despite inconsistencies in the plastic. Secondly, I upgraded the gear tooth extruder to a standard Makerbot version, although finding it was challenging. Thirdly, I glued a heatsink and fan onto the stepper motor to prevent overheating and skipping steps. Fourthly, I positioned the thermocouple or thermister as close as possible to the nozzle using tape, maintaining optimal temperature. Lastly, for consistent extrusion, I replaced the servo motor with a hybrid model after trying 32-step Pololu motors. These changes resulted in smooth, uninterrupted prints for up to four hours; longer tests are pending.