Compact Bowden Extruder (Geared Motor Version) for 1.75 filament

thingiverse

This is a customized version of Scarou's and 0110-M-P's Compact Bowden Extruder, designed specifically for use with 1.75mm filament and a Nema 17 Planetary Geared Motor featuring an 8mm bore hobbed drive gear. Tolerances are extremely tight in this design, making it uncertain whether it can be adapted to work with alternative hobbed gears or geared stepper motors. Here is the link to the components I used: Kysan Nema 17 Geared Stepper Motor (PN 1040229) Hardened Steel Hobbed Drive Gear (8mm Bore) The STEP files are included, allowing you to modify the design as needed. Added Body designed for Rostock Max V2/V1. The distance between mounting holes is identical to the EZstruder, making it compatible with the stock mounting bracket. Added Body featuring dual pushfit and no brackets. I am currently using this setup with an air extruder system and it works exceptionally well. Instructions: Recommended Settings: Body: 0.2mm layer height or less. 30% infill or more. Arms: 0.2mm layer height or less. 70% infill or more. Avoid using PLA, as the motor tends to run hot. The filament path has a diameter of 1.5mm, necessitating a 2mm drill bit for use with 1.75mm filament. Refer to the pictures for assembly instructions; they include annotations that demonstrate how to assemble the extruder. Bill of Materials: (x1) M5X16mm Socket Head Cap Screw (x2) M3X45mm Socket Head Cap Screws (x2) M3X30mm Socket Head Cap Screws (x1) M3X16mm Socket Head Cap Screw (x2) M3X8mm Socket Head Cap Screws (x3) M3 Nylon-Insert Locknuts (x4) M3 Fender Washers (x2) Springs (x1) 608zz Bearing (x1) 698zz Bearing (x1) Push Fit Connector with 5mm thread end (x1) Nema 17 Geared Stepper Motor (x1) Hardened Steel Hobbed Drive Gear (8mm Bore) (x1) Body (x1) Inner Arm (x1) Outer Arm Specifications: Hardened Steel Hobbed Drive Gear: 8mm Bore 13.1 mm Length 12.5 mm OD 11.4 mm Hobbed Diameter 10 mm center of teeth to edge Kysan Nema 17 Geared Stepper Motor (PN 1040229): 42 mm Gear Ratio: 5.18:1 20 mm long, 8 mm Shaft with D Cut Step Angle: 1.8° Rated Voltage: 2.4 V Rated Current: 1.0 A 2 Phase Inductance per Phase: 3.5 mH ±20% Phase Resistance per Phase 2.4 Ohms ±10% Phase Holding Torque: 2.2 Kg.cm Class B Insulation Diameter of the Geared Housing = 36 mm Diameter of the Mounting Holes = 2 mm