Geared Extruder 2

thingiverse

Geared Extruder for 3mm Filament This extruder works extremely well and has been running non-stop for hours. I installed it in a closed housing for ABS printing, with temperatures reaching up to 45°C inside. However, I soon discovered that the main body of the extruder began to warp over time. Conclusion: This extruder excels when used outside an enclosure. Inside an enclosed environment with high temperatures, it may not function as intended. As an alternative, consider using: https://www.thingiverse.com/thing:2855872 This is a Geared Extruder designed for use with 3mm filament. It can also be utilized with 2.85 and 1.75 mm filaments. I created this extruder to replace the old one on my K8200 Velleman printer, as it had become unreliable. The gear ratio remains unchanged from the original design, so no firmware adjustments are necessary. The filament guide can be customized to fit your specific filament size by drilling it accordingly. The M8 bolt used for the driver part has been turned down to 5 mm to accommodate the filament driver gear. Please refer to the pictures for dimensions. If you have a higher Hot End, you can swap out the "hot end bracket part1.stl" for the updated version, "hot end bracket part1 2.5mm higher.stl." Initially, I planned to use a budget-friendly Chinese Hot End but later opted for a European-made one, which resulted in a slightly taller Bowden connection. To accommodate this change, I created the "hot end bracket part1 2.5mm higher.stl" file. Please see the pictures for additional details on the assembly parts. The dark gray components are printed with PET-G Carbon, while the orange parts are made from ABS. The small gear features 10 teeth, and the larger gear has 43 teeth. Spring Update - April 8, 2018 After successfully using this extruder without a spring for an extended period, I encountered issues with a specific filament. Upon closer inspection, I discovered that the filament wire was not consistently round in length, leading to extruder failures when the filament bar failed to flex accordingly. The issue arose when the filament slipped on the driver gear due to the uneven diameter of the filament wire. To address this problem, I incorporated a spring into the design. In retrospect, incorporating a spring from the outset would have been a more prudent decision; however, at the time, I aimed to keep the design as simple as possible. The addition of a spring has significantly improved the extruder's reliability and reduced the need for precise pressure adjustments. Please refer to the additional picture provided. The new pressure bar holder is longer to accommodate the spring. A new knob, M5 bolt, and 8mm x 20mm spring have been introduced. Note that the old bolt was an M6, which took up excessive space. The pressure bar has also been modified to incorporate the spring. Parts List: 1X M3 x6mm bolt 5x M3 x 10mm bolt 6x M3 x20mm bolt 3x M3 x40mm bolt 12x M3 nut 7x M3 washer 1x M4 x40mm bolt 1x M4 nut 2X M4 washer 1X M6 x20mm bolt (M5 for the update) 1X M6 nut (M5 for the update + locking nut) 2X M8 washers 1x M8 bolt for the driver gear. See picture for dimensions 1x Filament driver gear 3X bearing 608Z 1X Nema 17 stepper motor 1X Spring (optional)