Status: version 3.1, beta testing
View 3D CAD file: https://wikifactory.com/+fabmxteam/fabmx/file/PelletExtruder/Version3.1/PelletExtruderv3.1.step
Github repository: https://github.com/ProjectFabMX/FabMX_Extruder
Item | Amount | Description | Source of supply | Comment |
---|---|---|---|---|
Extruder Screw | 1 | extruder screw | custom part, steel, drawing/parameters | |
Extruder Barrel | 1 | includes mount and water cooling channels | custom part, steel, see step file | |
Nozzle | 1 | standard 3D printer nozzle, type E3D V6 1.75mm; optionally hardened | e.g. https://e3d-online.com/products/v6-nozzles?variant=40924117598267 | Typical nozzle diameters are 0.4 or 0.6mm |
NEMA 23 Stepper Motor with gear box | 1 | see notes below | ||
Shaft Coupler | 1 | rigid shaft coupler 10mm to 12mm, D=max30, L=40 | e.g. [dold-mechatronik.de] or [aliexpress.com] | do not use flexible couplers, they cannot take axial load |
Heating cartridge | 2 | 40W, 24V, 6mm x 30mm | ||
Metal Cage | 1 | several laser cut aluminum parts | custom parts, aluminum 3mm, laser-cutting folder on github | |
Pellet Inlet | 1 | custom part, PLA/resin, 3d printed, see github | ||
Pellet Tank | 1 | custom part, PLA/resin, 3d printed, see github | ||
Temperature Sensor | 1 | standard thermistor for use with 3d printer controller board (e.g. 100K NTC) | ||
M5x110 | 4 | DIN-912 | ||
M3x8 | 4 | DIN-912 | for attaching the inlet to the lower aluminum plate | |
M3x20 | 2 | DIN-912 | for connecting pellet inlet and tank | |
M3 brass insert | 6 | e.g. [cnckitchen.store] | ||
Pneumatic fitting G1/8" | 2 | Fitting G1/8" for 4 or 6mm tubing | e.g. Festo QSML-1/8-4-100 | for water cooling, use tubing size to fit your cooling system We recommend liquid thread sealant |
Closing plug G1/8" | 1 | Closing plug G1/8" hex socket | e.g. [landefeld.de] | We recommend liquid thread sealant |
To run the extruder you will also need a water cooling system:
We are currently mainly using PolyMIM materials, as these feedstocks can be debindered easily in a water bath. See DIY 3D Printing with MIM Feedstock for tips on using the extruder for 3d printing.
The extruder uses a NEMA23 stepper motor with gear box. It needs to have the following specs:
Sources of supply:
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