¶ Cooling Fan for Hotend
The cooling fan for hotend is installed between the TH board and the extruder to dissipate heat from the hotend, preventing the filament from softening prematurely in the hotend, which could lead to clogging. Below is a list of components included with the cooling fan for hotend:
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Cooling fan for hotend * 1
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M2.5x8 screws - for fixing the cooling fan for hotend * 2
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BT2.6x8 screws - for fixing the cooling fan for hotend * 2
Cooling fan for hotend
¶ Tools and materials needed
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New cooling fan for hotend
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H2.0 Allen key
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H1.5 Allen key
¶ Safety Warning
IMPORTANT!
It's crucial to power off the printer before conducting any maintenance work, including work on the printer's electronics and tool head wires. Performing tasks with the printer on can result in a short circuit, leading to electronic damage and safety hazards.
During maintenance or troubleshooting, you may need to disassemble parts, including the hotend. This exposes wires and electrical components that could short circuit if they contact each other, other metal, or electronic components while the printer is still on. This can result in damage to the printer's electronics and additional issues.
Therefore, it's crucial to turn off the printer and disconnect it from the power source before conducting any maintenance. This prevents short circuits or damage to the printer's electronics, ensuring safe and effective maintenance. For any concerns or questions about following this guide, we recommend submitting a technical ticket regarding your issue and we will do our best to respond promptly and provide the assistance you need.
¶ Replace the Cooling Fan for Hotend
This guide extracts the disassembly and assembly steps from the complete toolhead disassembly guide. In practice, when replacing the cooling fan for hotend, it is not necessary to remove the PTFE tube, toolhead front cover, or left and right nozzles. Please disassemble as needed.
¶ Remove the cooling fan for hotend
¶ Step 1: Remove the TH Board
It is recommended to directly refer to this Wiki. Steps 3 and 4 are combined in the TH board disassembly Wiki for easier future maintenance.
To facilitate the removal of the cooling fan for hotend, you only need to take the TH board out of the toolhead without removing the MC-TH cable and USB-C cable from the cable chain. You can refer to this Wiki to remove the TH board from the toolhead.
Remove the Extruder Connection Board/TH Board/FPC Cable
¶ Step 2: Remove the Cooling Fan for Hotend
After confirming that the nozzle camera FPC is not stuck to the lifting motor rear cover, use tweezers to pry open the lifting motor rear cover.
Use an H2.0 Allen key to remove the two fixing screws (M2.5x8). These screws are located inside the plastic middle frame slot. Insert the screwdriver in the direction shown in the image to unscrew them. It is highly recommended to use a screwdriver with a magnetic tip.
Check the cable routing slot to ensure no cables are stuck (important). Then, pinch the lower part of the cooling fan for hotend and push it out backward.
¶ Install the Cooling Fan for Hotend
¶ Step 1: Install the Cooling Fan for Hotend
Organize the cables. Thread the lifting motor FPC through the hole in the fan bracket, and ensure all other cables are pulled away and not pinched. It is strongly recommended to confirm that no cables are pinched after installing the cooling fan for hotend before tightening the screws.
From top to bottom and left to right, the cables to be checked include: switching motor, extruder motor, extruder hall sensor board FPC, toolhead camera, nozzle camera, left and right eddy current coils, lifting hall, and lifting motor FPC (the last one should be threaded through the hole behind the motor rotor).
Use an H2.0 Allen key to tighten the two fixing screws (M2.5x8) and snap the lifting motor cover back into place.
¶ Step 2: Install the TH Board
You can refer to this Wiki to reinstall the TH board:
Remove the Extruder Connection Board/TH Board/FPC Cable
¶ Verify the Functionality
Connect the power, turn on the printer, and initiate a print job to check if it prints
¶ End Notes
We hope the detailed guide provided has been helpful and informative.
If this guide does not solve your problem, please submit a technical ticket, we will answer your questions and provide assistance.
If you have any suggestions or feedback on this Wiki, please leave a message in the comment area. Thank you for your support and attention!