DO NOT attempt to simply pull loaded filament out of a cold Polar3D 2.0 or 2.5 printer! It will cause the filament to break off in the nozzle, jamming the extruder, and you will need to disassemble the print head to clear the nozzle!
With a Polar3D 2.0 or 2.5 printer,2 you must ask the printer to back out the filament before you attempt to unload the filament. There are three ways to do this:
Note: If you don’t currently have a print job running, feel free to submit and “START” a print job (that you have no intention of really starting, let alone completing) merely to get the printer heating up and the Polar Cloud printer dashboard showing its “CHANGE FILAMENT” button. If the printer started out with a cold extruder, then the printer dashboard will make the “CHANGE FILAMENT” button available well before the printer has even finished heating up (to begin actually extruding), and you may click the “CHANGE FILAMENT” button as soon as it appears (before extrusion has actually begun).
Wait by the printer after clicking “CHANGE FILAMENT”. Once the extruder heats up, you will hear the printer filament drive gear running as the printer backs out the filament. As soon as the printer has backed out the filament and the filament drive gear has stopped running (the printer is quiet again), you should then pull the filament the rest of the way, entirely out of the printer.
2Note that the Polar Cloud printer “LIST” view displays printer make number.
3The “CHANGE FILAMENT” button is always present on the printer dashboard, regardless of whether or not a print job is running, as of Polar3D printer firmware version 17.09.19 or later, released early October, 2017.
4This button is present on the “Manual Printer Controls” screen as of Polar3D printer firmware version 17.09.19 or later, released early October, 2017.