Clearing A Jammed Hotend; Clearing A Jammed Nozzle - ORD RoVa3D User Manual

User Manual
careful not to enlarge the filament guide holes when drilling.
6. Drill the bottom guide hole from the bottom of the extruder up. Stop drilling before the drill bit reaches
the gear or damage to the drive gear may result.
7. Assembly is the reverse

5.4. Clearing a Jammed Hotend

If you are experimenting with new Slic3r modifications or different filament materials you may encounter
jamming of the hotend. Sometimes the hotend may jam if you fail to cool the hotend after a print before you
turn the power off. You can tell if the hotend is jammed by heating it up to operating temperature and
attempting to pull the filament out of the hotend by hand. If you need to clear a jammed hotend follow these
steps:
1. Cut the filament line below the extruder
2. Unscrews the extruder pressure plate
3. Release the filament feed tube from the extruder quick release
4. Release the filament feed tube from the hotend quick release
5. Unscrew and remove the nozzle from the hotend
6. Using a drill and the long 2mm drill bit, drill the filament out of the hotend barrel
7. Slowly advance the drill the initial 10mm, and then an additional 10mm or until you feel the drill bit
enter the softened area in the heating block.
8. Disengage the drill before removing it from the barrel, to ensure molten plastic isn't ejected by the
spinning drill.
9. Remove the drill bit from the barrel
10. Remove any filament stuck in the drill bit with needle nose pliers.
11. If you did not reach the softened area in the first 10mm, repeat for another 10mm, or until you have
cleared the full 75mm of the barrel.
12. At this point, return to using filament to clear the blockage, as described above.
13. Assembly is the reverse

5.5. Clearing a jammed nozzle

Sometime a nozzle can become plugged or jammed. The most common reason for this is leaving the hotend
on for a long time while NOT printing. During this idle time the filament inside the nozzle may offgas and burn
forming a black sludge that plugs the nozzle. Other reasons may include dust on the filament because the
filament cleaning wrap wasn't used. If you need to clear a jammed hotend then try these things:
1. Clear the jam by pushing some filament through the hot end manually
a. Heat the hotend up to operating temperature
b. Release the filament feed tube from the hotend quick release
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