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How to Replace the Nozzle

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Tools:

① Needle nose pliers

② 8mm socket tool

③ Feeler gauge sets

④ 2.5mm hex wrench

⑤Torque wrench (8mm socket)


Warning

Replacing nozzles requires precision, and improper installations may cause filament leakage during printing. To avoid this situation, we recommend that you replace the interchangeable hot end directly.


A. Unload the filament from the printhead

1. Unload the filament from the printhead where the nozzle needs to be replaced. While this tutorial uses the left nozzle as an example, work with whichever nozzle needs replacing on your printer.

1)Click "Utilities" on the screen to enter the printer control page.

Figure 1 Enter the "Utilities" page.

 

2)Set the temperature of the left nozzle to the proper unloading temperature. For example, the Raise3D Premium PLA filament is loaded in the left nozzle and its default loading temperature is 215℃. In our demonstration, we set the left nozzle temperature to 215℃.

Figure 2 Set the temperature of the left nozzle.


3)Click the "Unload" button, and the hotend will automatically begin to heat. When the hotend reaches the targeted temperature, click "Load". The extruder will pre-extrude the remaining filament in the printhead and begin to unload the filament.

Figure 3 Unload the filament.

 

4)Firmly depress the ring of the metal quick connector on the printhead and pull the filament guide tube out from the quick connector.

Figure 4 Extract the filament guide tube.


5)Gently pull the filament out of the printhead. When all of the filament is removed from the printhead, click "OK" on the screen to end the unloading.

Figure 5 Pull out the filament.


B. Adjust the position of the build plate and the printhead

1. Enter the “Utilities” page, and click the “Disable Motor” button to disable the motor. Now you can manually move the printhead to a suitable position.

Figure 6 Click “Disable the motor”.

 

2. Select the Z-axis, then click the up and down arrows to move the build plate to a position suitable for working.

Figure 7 Adjust the height of the build plate.


C. Remove the old nozzle

1. In order to remove the nozzle smoothly, first heat the left nozzle to 180℃-200℃.

1) Select the left hotend icon on the home page, set the temperature to 180℃, and wait for the left nozzle temperature to rise to the specified temperature.

Figure 8 Heat the left nozzle.

 

2) When the temperature of the left nozzle rises to the specified temperature, turn off the power of the printer.

Note: Do not work on the printer with the power on to avoid personal injury and causing damage to the printer.

Figure 9 Turn off the printer power.

 

2. You can use a 2.5mm hex wrench to loosen the 4 screws on the hotend cooling fan and move the fan away.

Note: It is recommended to remove the interchangeable hotend from the printhead for easier access in replacing the nozzle of the hotend assembly.

Figure 10 Remove the hotend cooling fan.

 

3. Carefully clasp the heating block with needle-nose pliers to prevent the heating block from moving when rotating the nozzle. Then, engaged the nozzle with an 8mm socket. Turn the socket clockwise (when observing top-down) to loosen and remove the nozzle from the heating block component.

Important: The heating block and nozzle may still be hot enough to cause burns.

Figure 11 Engage the nozzle using an 8mm socket tool. Use pliers to secure the heating block.

 

Figure 12 Remove the nozzle using the socket tool.


D. Install a new nozzle

1. Prepare a new nozzle.

Figure 13 Prepare a new nozzle.

 

2. Ensure the left interchangeable hotend is installed on the printhead, and power on the printer. Select the left hotend icon on the home page, set the left hotend temperature to 180℃, and wait for the left nozzle temperature to rise to the specified temperature.

Figure 14 Heat the left nozzle.


3. When the temperature of the left nozzle rises to the specified temperature, turn off the power of the printer.

Note: Do not work on the printer with the power on to avoid personal injury and causing damage to the printer.

Figure 15 Turn off the printer power.


Note: It is recommended to remove the interchangeable hotend from the printhead for easier installation of a replacement nozzle on the hotend assembly.

 

4. Use the socket tool to carefully fasten the nozzle into position on the heating block.

Note: At this point, the temperature of the heating block is still very high, be careful of burns.

Figure 16 Install the new nozzle.


5. Firmly secure the heating block with needle-nose pliers to prevent the heating block from moving. Set the torque wrench (8mm socket) to 39±1kgf/cm (about 3.9N.m). Ratchet the torque wrench counterclockwise (observing from top-down) evenly until the nozzle is tightened appropriately.


Warning

1. When using needle-nose pliers to hold the heating block, be mindful not to damage the heating block with the needle-nose pliers.

2. Be sure to use a torque wrench set to 39±1kgf/cm (about 3.9N.m). Evenly and slowly turn the nozzle counterclockwise (observing from top-down), until you hear a "click" (the predetermined torque value has been reached) and stop turning the nozzle.


Figure 17 Firmly secure the heater block while affixing the nozzle.

 

6. Ensure that there is a spacing of 0.1mm-0.6mm between the shoulder of the nozzle and the heating block after the nozzle is properly tightened.

Warning

A distance of 0.1mm-0.6mm MUST be present between the nozzle and the heating block. If a gap is not present, the installation may cause filament leakage during the printing process.


1)Insert a 0.1mm feeler gauge between the shoulder of the nozzle and the heating block to verify that a 0.1mm gap is present. If the 0.1mm feeler gauge cannot be inserted into the gap, the nozzle is over-tightened. Remove the nozzle and thread the throat tube component a small amount further into the heater block. When installing a nozzle, the nozzle must make contact with the throat tube inside the heater block to prevent filament leakage.

Figure 18 Check the spacing between the nozzle and the heater block with a feeler gauge.

 

2)An acceptable spacing between the shoulder of the nozzle and the heating block is 0.1mm-0.6mm.

Figure 18 An acceptable spacing between the shoulder of the nozzle and heating block.


7. Use a 2.5mm hex wrench to fasten the 4 screws securing the fan into its original position.

Figure 19 Install the screws securing the hotend cooling fan.

 

Note: When installing the fan, the connecting cable of the fan needs to be locked in the slot to avoid damaging the wiring.

Figure 20 Install the fan.


E. Run the Offset Calibration

1. When the new nozzle is installed, run the 5-step Offset Calibration to calibrate the nozzle and check the nozzle for potential leaks.

 

2. Make sure the printer has 2 spools of Raise3D Premium PLA filament loaded and that it can extrude the filament normally. Refer to the Pro3 Series-How to Load and Unload the Filament in the Support Center.

 

3. Click the "Settings" icon in the upper right corner to enter the settings interface.

Figure 21 Enter the setting interface.


4. Select “Maintenance” on the "Machine" tab.

Figure 22 Enter the Maintenance interface.

 

5. Select "Offset Calibration".

Figure 23 Enter the Offset Calibration.

 

6. Make sure the printer meets all the requirements on the screen, and then click "Start".

Figure 24 Confirm the requirements.

 

7. You will enter the 5-step Offset Calibration interface, run each step in numbered order.

Figure 25 Run the 5-step Offset Calibration.

 

8. Carefully observe the hotend for leaks during printing. If the hotend leaks, reinstall the nozzle following the steps in this guide. If a leaking issue persists, please contact Raise3D after-sales support.

 

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