These instructions apply to Polar3D 1.0 printers only! DO NOT attempt to pull filament out of a Polar3D 2.0 or 2.5 printer – instead, see Section 4.1.2 for instructions on unloading!
After a print job completes, the Polar3D printer will slowly retract the filament back out of the melt zone of the extruder. This allows you to unload the filament even when the printer is cool. However, removing the filament while still warm (or else heating up the extruder again to somewhat melt the filament) will likely be easier (and less likely to result in flakes of filament jamming up the filament drive gear).
Particularly if the filament is still warm, you should be able to simply pull the filament straight up and out of the print head.
If the filament is stuck, raise the extruder temperature to 200°C.5 Once the filament has softened, you should now be able to pull the filament straight up out of the print head.
If changing filament while a print job is printing, a printer manager (or members of a group configured with “Control Printers” access) may conveniently use the “CHANGE FILAMENT” control button on the printer dashboard to have the print pause and the printer “back out” the filament in-use.
5Printer extruder temperature can be controlled at the Polar Cloud printer dashboard’s temperature dial or at the printer local web interface’s “Manual Printer Controls” screen. If using a direct cable connection with Repetier-Host to control the printer, under Repetier-Host’s “Your Printer”, use the controls on the “Manual Control” screen to set the extruder temperature.