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


BOM

ItemAmountDescriptionSource of supplyComment
Extruder Screw1extruder screwcustom part, steel, drawing/parameters
Extruder Barrel1includes mount and water cooling channelscustom part, steel, see step file
Nozzle1standard 3D printer nozzle, type E3D V6 1.75mm; optionally hardenede.g. https://e3d-online.com/products/v6-nozzles?variant=40924117598267Typical nozzle diameters are 0.4 or 0.6mm
NEMA 23 Stepper Motor with gear box1see notes below

Shaft Coupler1rigid shaft coupler 10mm to 12mm, D=max30, L=40e.g. [dold-mechatronik.de] or [aliexpress.com]do not use flexible couplers, they cannot take axial load
Heating cartridge240W, 24V, 6mm x 30mm

Metal Cage1several laser cut aluminum partscustom parts, aluminum 3mm,
laser-cutting folder on github

Pellet Inlet1
custom part, PLA/resin, 3d printed, see github
Pellet Tank1
custom part, PLA/resin, 3d printed, see github
Temperature Sensor1standard thermistor for use with 3d printer controller board (e.g. 100K NTC)




M5x1104DIN-912

M3x84DIN-912
for attaching the inlet to the lower aluminum plate
M3x202DIN-912
for connecting pellet inlet and tank
M3 brass insert6
e.g. [cnckitchen.store]
Pneumatic fitting G1/8"2Fitting G1/8" for 4 or 6mm tubinge.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"1Closing plug G1/8" hex sockete.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.


Motor/Gearbox

The extruder uses a NEMA23 stepper motor with gear box. It needs to have the following specs:

Sources of supply:


Size/Mounting Holes


Assembly Notes




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