Tools:
1. 1.5mm hex wrench
2. Tweezers
3. 1.5 mm clearing rod
4. Needle-nose pliers
5. 8 mm socket tool
1. The temperature of the hotend is not hot enough, causing the filament to jam from not melting adequately to be extruded while printing.
2. The filament is excessively heated enough to become carbonized, blocking the nozzle opening.
3. The temperature in the printer is above the filament’s glass-transitioning point, causing the filament to melt outside the hotend’s hot zone.
4. The throat tube/nozzle is leaking from an errant gap introduced within the heater block.
5. The throat tube is bent and restricting the filament pathway.
6. The first layer is too close to the build plate.
7. The quality of the filament is poor: composition impurities, and/or entangled windings.
8. Filament diameter is inconsistent, exhibiting dimensional errors exceeding +/- 0.03mm.
9. Hygroscopic filament is insufficiently dried, and moisture is present, adversely affecting performance.
10. Filament can become brittle and crack if they are stored for too long in an unsuitable environment.
11. Filament can exhibit insufficient rigidity and may jam at the extruder gears.
12. The hotend’s front-facing fan is damaged, exhibiting reduced cooling, allowing premature filament melting to occur beyond the hot zone of the hotend component.
1. Increase the loading temperature and load the filament.
1) On the “Utilities” tab, increase the loading temperature. For example, the loading temperature of Raise 3D Premium PLA filament is 215°C; adjust the temperature to include an additional 5°C to 15°C.
Figure 1. Increase the loading temperature.
2) With the temperature modified, start the loading process by pressing the appropriate “Load” button.
Figure 2. Load the filament.
3) Gently attempt to push the filament downward, by hand, to assist it advancing to the heated nozzle.
Figure 3. Gently guide the filament downward, by hand.
Conclusion:
1. Manually assist the filament travel for a minute and observe if successful extrusion can begin. If successful, run a small test print to see if the jamming problem recurs.
2. If the filament cannot be pushed downward, continue to Step 2.
1. Set an appropriate unloading temperature, press "Unload", and follow the on-screen instructions to unload the filament.
Figure 4. Unload the filament.
Conclusion:
1. If you can successfully unload the filament, continue to Step 2.1.
2. If you cannot unload the filament, skip ahead to Step 3.
1. Select the L-nozzle on the home page, set the temperature to include an additional 5°C to 15°C.
Figure 5. Heat the nozzle.
2. After the nozzle reaches the target temperature, insert the clearing rod into the printhead until you feel that the length of the rod has reached the nozzle tip. Please note, the clearing rod can NOT physically pass through the nozzle opening.
Figure 6. Clear the filament pathway using the clearing rod.
Conclusion:
1. If you feel that the clearing rod reaches the nozzle tip, it means that the printhead’s filament pathway has been cleared of obstructions. Proceed to load filament to see if it can be extruded normally. If the filament can be extruded normally, run a small print test to see if the problem recurs; if the filament cannot be extruded, go back to Step 1.
2. If the clearing rod does NOT fully reach the nozzle tip, it means that an obstruction is present. Continue to Step 2.1.1.
1. Insert the clearing rod into the printhead and approximate where the tip of the rod meets resistance, according to the figure below.
Figure 7. Confirm the approximate position of the obstruction using the clearing rod.
Conclusion:
1. If the clearing rod is blocked from entering Section “I”, it is recommended to replace the interchangeable hotend. If issues arise during the replacement process, contact Raise3D after-sales support for troubleshooting assistance.
Open a Support Ticket for assistance at: https://help.raise3d.com/support/home
Note:
1. Removing the interchangeable hotend component may be difficult if filament is present within the filament pathway of Section “I” and Section “II”. It is NOT recommended to forcefully remove the interchangeable hotend from the printhead.
Figure 8. Do not forcefully remove the interchangeable hotend from the printhead.
1. It is not recommended to disassemble the hotend component unless guided by a qualified technician. Please contact Raise3D after-sales support for troubleshooting assistance.
2. If the clearing rod tip is blocked within Section “II”, remove the front cover, cut the filament and try to carefully extract the filament from the pathway of the printhead.
Procedure shown below:
a. Turn off the power for the printer, use a 1.5mm hex wrench to remove the 4 screws of the front cover on the printhead, then remove the front cover and inspect for filament stuck in the printhead.
Figure 9. Open the printhead to reveal the filament pathway.
b. If filament accumulates at the gearwheels, cut the filament within the red circle and try to extract the filament from there. Use tweezers to extract any presence of small filament remnants.
Figure 10. Clear the gearwheels of filament and debris.
c. If filament cannot be successfully extracted, inspect the white Teflon tube for filament accumulation. If the Teflon tube is clogged or damaged, it is recommended to replace the component.
Figure 11. Inspect the Teflon tube for issues.
3. If the clearing rod is blocked within Section “III”, continue to Step 3.
1. Turn off power to the printer, remove the 4 screws of the front cover on the printhead using a 1.5mm hex wrench, and then remove the front cover to check for filament stuck in the filament pathway.
Figure 12. Open the printhead.
2. Turn on power to the printer, select the L-nozzle on the touchscreen Home tab, and set the target temperature to include an additional 5°C to 15°C of the normal printing temperature.
3. Cut the filament, and try to carefully extract the filament from both the upper feeding port and the Teflon tube.
Figure 13. Extract the filament separately.
Conclusion:
1. If all filament obstruction can be removed, run a small test print to see if the problem recurs.
2. If the filament cannot be drawn out, continue to Step 4.
1. Check which section of filament cannot be pulled out.
Figure 14. Check which section of filament cannot be pulled out.
2. If filament cannot be pulled out from Section “III”, use needle-nose pliers to unscrew the quick connector. Then, extract the short feeding tube. Use a rod to purge any pathway obstruction. If the filament debris cannot be cleared, it is recommended to replace the short feeding tube component.
Figure 15. Remove and examine the short feeding tube.
2. If filament cannot be removed from Section “I”, set a higher target temperature to heat the nozzle. Then, carefully attempt to remove the filament. If it cannot successful be purged, it is recommended to replace the interchangeable hotend component.
Figure 16. Attempt to remove the filament.
3. If the filament was successfully removed, go to Step 2.1, and continue to clean any remaining blockage.
1. Ensure that both hotends have a spool of Raise3D Premium PLA filament loaded, and can successfully extrude on both sides.
2. Run the 5-step offset value calibration to properly configure the nozzle height and offset value.
1) Select the gearwheel icon in the upper-right corner to enter the “Setting” interface. Then, select "Maintenance" > "Offset Calibration".
Figure 17. Run the offset calibration.
3. Confirm that your printer has met all requirements listed on the touchscreen, then select "Start".
Enter the 5-step offset value calibration interface and complete each step, in numerical order, starting with Step 1.
4. Carefully observe the printer for signs of jamming or leaking during the printing process. Please follow this guide to locate and clear any occurrence of jamming. If repeat jamming events occur, especially in a consistent location in the printhead, please contact Raise 3D after-sales for troubleshooting assistance.
