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Tool：
① 2mm hex wrench
② 2.5mm hex wrench
A. Unload the Filament in Extruder.
Make sure the printing task is paused or completed before unloading the filament.
1. Select the “Utilities” tab on the screen.
Figure 1 Enter the “Utilities” tab.
2. Set the temperature of the nozzle to the proper loading temperature. For example, the Raise3D PLA default loading temperature is 215℃. In this guide, we demonstrate how to perform this procedure using the left nozzle as an example. We set the left nozzle temperature to 215℃.
Figure 2 Set the temperature of the nozzle to the proper unloading temperature.
3. Select "Unload", and the printer will start heating. When the printer reaches the target temperature, select "Unload". The extruder will pre-extrude the remaining filament and begin to withdraw the filament.
Figure 3 Unload the filament.
4. Press the quick connecter, and pull out the filament guide tube.
Figure 4 Press the quick connector, and pull out the filament guide tube.
5. Gently pull the filament out of the extruder. After the filament is completely removed from the extruder, select "OK" on the screen to end the unloading.
Figure 5 Gently pull out the filament from the extruder.
1. Turn off the printer and cut off the power.
Figure 6 Turn off the printer and cut off the power.
2. Remove the hotend connecting cable.
1) Release the red buckle, and hold the red handle in front of the interchangeable hot end to remove it from the printer. For details on how to do this, see How to Install and Disassemble Interchangeable Hot Ends V1.0.
Figure 7 Release the red buckle, and remove the interchangeable hot end from the printer.
Note: The temperature of the interchangeable hot end is relatively high, please wait for it cooling down before removing; or wear the supplied heat insulation gloves before operating.
2) Remove the 2 fixing screws on the hotend adapter board with the 2mm hex wrench.
Note: To avoid electric shock, do not touch the hotend adapter board when the power is on or when your hands are wet.
Figure 8 Remove the 2 fixing screws on the hotend adapter board with the 2mm hex wrench.
3）Remove the back cover and remove the 7 screws from it. 6 of the screws require a 2mm hex wrench to remove them and are indicated with a red circle in the image below. One of the screws requires a 2.5mm hex wrench to remove it and is indicated with the green circle in the image below.
Figure 9 Remove the back cover and remove the 7 screws from it.
4）Locate the position of the hotend connecting cable, press the small buckle above, and pull out the hotend connecting cable.
Figure 10 Locate the position of the hotend connecting cable, press the small buckle above, and pull out the hotend connecting cable.
5）Remove the old hotend connecting cable.
Figure 11 Remove the old hotend connecting cable.
1. Prepare the replacement hotend connecting cable. Locate the installation position of the hotend connecting cable, press the upper small buckle, and connect the replacement hotend connecting cable to the hotend adapter board.
Note：The label "CODE BAR" is the front side of the Hotend Adapter Board. Insert it into the shell and make sure the “CODE BAR” label is facing forward.
Figure 12 Connect the replacement hotend connecting cable to the hotend adapter board.
2. Install the Hotend Adapter Board assembly back to the extruder. Tighten the two securing screws, locate the screw hole, and tighten the two fixing screws with a 2mm hex wrench.
Note： When installing the assembly back to the extruder, the "CODE BAR" label should face down.
Figure 13 Install the Hotend Adapter Board assembly back to the extruder, and tighten the two fixing screws with a 2mm hex wrench.
3. Locate the position of the hotend connecting cable, press the small buckle above, and insert the hotend connecting cable.
Figure 14 Locate the position of the hotend connecting cable, press the small buckle above, and insert the hotend connecting cable.
4. Put the back cover in place and tighten the 7 screws on it. 6 of the screws require a 2mm hex wrench to replace them and are indicated with a red circle in the image below. One of the screws requires a 2.5mm hex wrench to replace it and is indicated with the green circle in the image below.
Figure 15 Put the back cover back in place and install it.
Figure 16 Tighten 7 screws on the back cover.
5. Install the interchangeable hot end. Release the red buckle, and hold the red handle in front of the interchangeable hot end to install it on the printer. For details, see How to Install and Disassemble Interchangeable Hot Ends V1.0
Figure 17 Release the red buckle, and hold the red handle on the front of the interchangeable hot end to install it on the printer.
D. Check If the Printer Runs Normally After Replacing the Hotend Connecting Cable.
1. Find the power switch at the bottom right on the back of the printer and turn on the switch.
2. Check if the extruder operates normally by going through the process of loading the filament.
1）Select the “Utilities” tab on the screen.
Figure 18 Enter the “Utilities” tab.
2）Set the temperature of the nozzle to the proper unloading temperature. For example, the Raise3D PLA default loading temperature is 215℃. Here, we use the left nozzle as an example of how to perform this procedure. We set the left nozzle temperature to 215℃.
Note: The recommended loading temperature for other filaments is typically 5-10℃ higher than its common printing temperature.
Figure 19 Set the temperature of the nozzle to the proper unloading temperature.
3）Select the “Load” button and the printer will begin to heat. When it reaches the target temperature, select "Load".
Figure 20 Load the filament.
4）The extruder gear will start to rotate. Gently push the filament into the extruder. When the filament extrudes from the nozzle, click "OK" to complete the loading.
Figure 21 Gently push the filament into the extruder.
5）Confirm that the filament can extrude evenly, and then insert the guide tube back into place. Now that the printer operates normally after replacing the hotend connecting cable, you can start printing your model.
Figure 22 The printer runs normally, insert the guide tube back into place.
[ Pro3 Series – How to Replace the Hotend Connecting Cable – V1.0 ]
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