Tools:
① 2mm hex wrench
② 8mm socket wrench
③ Adjustable wrench
④ Heat resistant gloves
⑤ 0.3 mm Stainless Steel Feeler Gauge
(additional 0.1mm feeler gauge for reference)
⑥ Torque wrench (8mm socket)
1. With the machine powered on, select “Utilities” > “Filament Loader". Then select “Unload” to unload the filament in the extruder (If there is no filament in the extruder, you can just skip this step).
Figure 1. Unload the filament.
2.Select the "Utilities" tab > "Move Axes", select the Z-axis and upward arrow to lift the X-axis gantry to a suitable height for the following operation.
Figure 2. Lift the X-axis gantry to a suitable height.
3. Select the “Motor Disable” button, then move the printhead (with the nozzle will be replaced) to a center position. This guide will use the left nozzle as an example.
Figure 3. Disable the motor and move the printhead to the center.
4. Select "Home" tab -> "L-Nozzle temp" and set the left nozzle temperature to 200°C, wait until the left nozzle reaches 200°C, then power off the printer.
Figure 4. Set the left nozzle temperature to 200°C, then power off the printer.
5. With the printer powered off, remove the two retaining screws on the printhead cover with the 2mm hex wrench. Then, carefully remove the printhead cover.
Figure 5. Remove the retaining screws.
6. 1.Use the 2mm hex wrench to loosen the hotend set screw to release the hotend component from the printhead. It is not necessary to fully remove the set screw.
Note: The hotend is hot, remember to put on the heat resistant gloves.
Figure 6. Remove the nozzle.
7. Secure the aluminium heating block of the hotend using the adjustable wrench and engage the nozzle with an 8mm socket wrench. Unscrew the nozzle from the component.
Note: The hotend is made of aluminum. Do not clamp it with excessive force, or you may distort it, and be careful not to break the attached cables.
8. Prepare an E2 series appropriate replacement nozzle.
Figure 7. Prepare an E2 series replacement nozzle.
9. Power the printer on. Set the left nozzle temperature again to 200°C. Wait until the left nozzle reaches 200°C, then power off the printer.
Figure 8. Power on the printer, set the left nozzle temperature to 200°C, then power the printer off before proceeding.
10. 1.With the printer powered off, secure the aluminium block of the hotend with the adjustable wrench. Prepare a torque wrench (8mm socket), set it to 39±1kgf/cm (about 3.9N.m). Engage the nozzle with the torque wrench and turn the wrench evenly until the nozzle is tightened.
When tightened, a distance of at least 0.1mm must be reserved between the shoulder of the nozzle and the aluminium heating block. A suitable spacing between the shoulder of the nozzle and the heating block is 0.1mm-0.4mm.
⚠Warning
1. When using the adjustable wrench to hold the heating block, be careful not to damage the heating block.
2. Be sure to use a torque wrench, set it to 39±1kgf/cm (about 3.9N.m). Evenly and slowly turn the nozzle, until you hear a "click" (the predetermined torque value has been reached), stop turning the nozzle.
11. Mount the assembled hotend component into the printhead and use the 2mm hex wrench to fasten the set screw to secure it. Ensure that the hotend is fully inserted into the printhead.
Figure 9. Reinstall the new nozzle.
12. Verify that there is a spacing of 0.1mm-0.4mm between the shoulder of the nozzle and the aluminium heating block after tightening the nozzle.
⚠Warning
A distance of at least 0.1mm MUST be reserved between the shoulder of the nozzle and the heating block. If it is not suitable, it may cause material leakage during the printing process.
1）Insert a 0.1mm feeler gauge between the shoulder of the nozzle and the heating block to test that at least a 0.1mm feeler gauge can be inserted into the gap. If a 0.1mm feeler gauge cannot be inserted into the gap, the nozzle may likely not be contacting the throat tube component, which could contribute to filament leakage when printing. Please consult Raise3D after-sales support for assistance.
Figure 10. Verify the spacing between the nozzle and the heater block with a feeler gauge.
13. If a suitable gap is present, use a 2mm hex wrench to reinstall the printhead cover.
Figure 11. Reinstall the printhead cover.
14. 1.After the hotend is installed, power on the printer and run the five-step Offset Calibration to calibrate the nozzle’s Z probe Offset.
(For more information, please refer to the tutorial: E2 - How to Adjust the Height of Left and Right Nozzle).
Note: You can find the “Offset Calibration” at the gearwheel icon “Setting” > Machine tab > Maintenance > Offset Calibration”.
Figure 12. Run the five-step Offset Calibration.
