Nozzle Assembly Replacement
Tools and materials needed
●2.5mm hex wrench
●2.0mm hex wrench
●5.0mm Phillips screwdriver
●Nozzle assembly
Reference video
Precautions before operation and machine status
This operation involves replacing the print head assembly. Before performing these operations, please turn off the machine and wait for the print head to cool down completely.
Operation steps
1-Remove the print head
- Power off the printer, unplug the port cable of the fan assembly located directly behind the print head, use a 2.5mm hex wrench to loosen the three fixing screws of the "rear fan assembly", and remove the rear fan assembly.
- Use a 2.0mm hex wrench to loosen the two fixing screws of the "cable fastener" and the two fixing screws of the whole print head assembly.
- Press the "horn terminal" on both sides with your hands, the print head cable will pop out automatically, and then take out the print head cable.
- Use a 2.0mm hex wrench to loosen the two fixing screws of the "print head front cover" and remove the whole print head assembly.
2-Replace the nozzle assembly
- Separate the front cover of the whole print head assembly, and use a Phillips screwdriver to loosen the four fixing screws of the "fan bracket" (two on each side).
- Unplug the "proximity switch" cable port in the extrusion adapter board, and remove the "fan bracket" assembly downwards.
- Unplug the ports of the "heater" and "thermistor" cables in the extrusion adapter board.
- Use a 2.0mm hex wrench to loosen one screw of the "connector" and remove the connector. Then loosen the two fixing screws of the "nozzle assembly" and remove the "nozzle assembly" and "Teflon tube".
- Take out the new "nozzle assembly" (You need to re-insert the Teflon pipe, making sure it reaches the bottom of the throat pipe), put it in the mounting position, and use a 2.0mm hex wrench to tighten the two fixing screws of the "nozzle assembly".
- Remove the "connector" and use a 2.0mm hex wrench to tighten a set screw.
- Insert the cable port of the heater into the "HE0" port of the extrusion adapter board, and insert the cable port of the thermistor into the "TH1" port of the extrusion adapter board (The ports have fool-proof port designs, so pay attention to the distinction).
3-Install the print head
- Align the "fan bracket" assembly with the screw holes on both sides to install, and then insert the cable of the "proximity switch" into the PS port in the "extrusion adapter board".
- Install the front cover of the whole print head assembly (It has a groove design and can be installed by sliding it in).
- Place the whole print head assembly into the mounting position in front of the print head, and use a 2.0mm hex wrench to tighten the two fixing screws of the "print head front cover".
- Press the "horn self-locking terminal" to both sides with your hands to open the port, and then insert the print head cable into the port (Note that the cable passes under the top profile).
- Use a 2.0mm hex wrench to tighten the two fixing screws of the "cable fastener" and the two fixing screws of the print head.
- Take out the fan assembly, align it with the screw hole mounting position, use a 2.5mm hex wrench to tighten the three fixing screws of the rear fan assembly (install with the air outlet facing downward), and insert it into the fan assembly interface cable port.
- Power on the printer, click [Prepare - Temperature] on the touch screen, and then click "PLA" on the temperature control interface. The printer will start to heat the nozzle and hot bed. After observing that the heating temperature is normal, it can be used normally after re-leveling.