Status: version 2.0.1, in testing (photo shows version 2.0)

View 3D CAD file: Extruder_2.0.1.step - 3D view

Github repository: https://github.com/ProjectFabMX/FabMX_Extruder


BOM

ItemAmountDescriptionSource of supplyComment
Extruder Screw1extruder screwcustom part, steel, drawing/parameters
Extruder Block / Kühlblock1holds barrel; integrated water coolingcustom part, steel, drawing
Extruder Barrel / Schneckenzylinder1screws into extruder blockcustom part, steel, drawing
Nozzle1standard 3D printer nozzle, type E3D V6 1.75mm; hardenede.g. https://www.aliexpress.com/item/4000463888666.html
NEMA 23 Stepper Motor with gear box1use a gear ratio of 1:20 to 1:45e.g. https://de.aliexpress.com/item/4000341116560.html longer NEMA23 optional
Shaft Coupler1shaft coupler 10mm to 12mme.g. https://www.aliexpress.com/item/4000002010204.html
Heating Element1230V heater spiral, ID=15mm, h=40mme.g. https://www.aliexpress.com/item/32629957364.htmlwraps around barrel
Metal Cage1several laser cut aluminum partscustom parts, aluminums 3mm, see laser-cutting folder on github
Pellet Inlet1
custom part, PLA, 3d printed, see 3d-printing folder on github
Pellet Tank1
custom part, PLA, 3d printed, see 3d-printing folder on github
Temperature Sensor1standard thermistor for use with 3d printer controller board (e.g. 100K NTC)

e.g. https://www.ebay.de/itm/321913407822

or thermocouple integrated in above heater element, then use this temperature controller (not compatible with typical 3d printer hardware): https://de.aliexpress.com/item/32954616330.html?spm=a2g0o.cart.0.0.23af3c00hLDu73&mp=1


M5 x 1204steel screw






To run the extruder you will also need a water chiller for cooling. Alternatively, just use a water pump and a water reservoir (>3 liters)

We are currently mainly using PolyMIM materials, as these feedstocks can be debindered easily in a water bath.




Copyright FabLab München e.V. 2021
Licensed under the CERN-OHL-P v2
You may redistribute and modify this documentation and make products
using it under the terms of the CERN-OHL-P v2 (https:/cern.ch/cern-ohl).
This documentation is distributed WITHOUT ANY EXPRESS OR IMPLIED
WARRANTY, INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY
AND FITNESS FOR A PARTICULAR PURPOSE. Please see the
CERN-OHL-P v2 for applicable conditions

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