Differences

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--- public:spot_-_3d_printing:filament_recycling [2025-09-05 14:15] – Sebastien Martinerie
+++ public:spot_-_3d_printing:filament_recycling [2026-02-27 14:29] (current) – Sebastien Martinerie
@@ Line 22: / Line 22: @@
 This process is as follows:
-{{ :public:spot_-_3d_printing:cycle_recyclage.png?nolink&600 |}}
+{{:public:spot_-_3d_printing:cycle_recyclage.png?nolink|}}
+**Results**
+  * Sorting and cleaning the waste are critical steps in order to reduce the difficulties and number of defects at the end.
+  * Extruding a new filament from waste is particularly difficult, especially with PETG. The process is very sensitive.
+  * At the end, we are able to extrude good filament made 100% of waste (without adding virgin material) and with no loss of material properties!
+  * Because of all these factors, our spools still present some defects (diameter change, presence of foreign objects) that can clog the 3D printers' nozzles.
+  * Now we are working on quality control: detection and correction of the defect.
+The project is still in progress but hopefully we will be able to let students try our in-house filament in 2026.
+**How you can contribute**
+  * As a SPOT user, you already contribute by giving us some raw material. But PLEASE, throw your plastic parts carefully! **PURE PET-G ONLY!! NO GLUE; NO SCREWS, NO INSERTS!!**
+  * As a Master student, you can contribute by doing a semester project with us! Ask the coach for available projects.
+  * You can also join the [[https://www.epfl.ch/schools/sv/fr/science-de-la-vie/a-propos/bureau-de-durabilite/plast-it-back-2/|Plast it back]] group of students who is focusing on plastic recycling.
+----
+====== Printing with SPOT-G ======
+During the test phase, you can print with SPOT-G on P33 MK4 printer. **Please print only on this printer!**
+**Settings you need:**
+  - Printer: MK4 Input Shaper with 0.4 mm nozzle
+  - Filament: SPOT PETG – MK4IS
+  -
+See the wiki page for PrusaSlicer configuration [[public:spot_-_3d_printing:prusaslicer_configuration|]]
+**Please read carefully:**
+  * This filament is in beta-test mode. **For short and non-decisive parts ONLY!**
+  * The filament might get stuck in the printhead from time to time.
+When this happens, the printer will pause and unload the filament. Cut the defect*, reload the filament and resume your print.
+  * Print during the day and stay here to be able to do the correction.
+  * Please give us your feedback on the sheet next to the printer so we can monitor defects frequency.
+*** Defects types**
+The filament will get stuck and stop printing if its diameter exceeds 2mm. You can have two types of defects on this filament:
+  * Short defect: when there is a foreign object inside (shredded insert for example). In that case, cutting 2 or 3cm of filament should be enough.
+  * Long defect: when diameter is just too large for more than 2cm. In that case, you might have to cut a longer portion of the filament, until it get loaded in the nozzle again).