When to use?
This guide is intended for use if there is a problem with the Hotend Heating Assembly for your A1 mini.
Common situations that require replacement of the hotend heating assembly include:
- The Hotend Heating Assembly is wrapped in plastic due to a print failure
- The heater or thermistor is not working anymore
- The hotend metal latch is not working anymore
- Recommended by техническая поддержка
Tools and materials needed
- магазин Bambu Lab
- H1.5 & 2.0 Allen key
- Flat tweezers
- 25 minutes of your time
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. По любым вопросам или сомнениям, связанным с этим руководством,
Video Guide
Remove the Old Hotend Heating Assembly
1. Remove the toolhead rear housing
We start by removing the toolhead rear housing.
Carefully pry open the toolhead rear housing by pulling on the bottom section as shown below.
2. Disconnect the cable
Remove the hotend heating assembly attached to the TH Board.
Carefully pull it out by the connector, and avoid pulling the cable from the connector.
We recommend using a flat tool to gently pry them out to avoid any potential damage.
3. Remove the toolhead front cover
Grab the base of the front cover and gently pull towards you.
The clips holding the cover in place will be released, allowing you to remove the front cover
4. Remove the hotend
Remove the silicone sock for hotend by gently pulling it towards you, then remove the hotend.
All the steps are labeled on the extruder sticker.
5. Remove the extruder screws
Remove the screws as shown in the picture, and gently pull the extruder forward a little. Be careful when pulling it out, as you will need to carefully disconnect the filament sensor ribbon cable.
6. Remove the right cable cover
Push the cable cover toward the back of the toolhead and gently remove the cable from the toolhead.
7. Remove the hotend heating assembly
After removing the 3 screws shown in the picture, carefully remove the cable from the cable channel.
Note: If the hotend heating assembly cable is blocked by the part cooling fan cable in the same cable channel and cannot be removed, you can disconnect the fan connector, loosen the fan cable, and remove the hotend heating assembly cable.
Install the New Hotend Heating Assembly
1. Install the Hotend Heating Assembly
First, carefully place the cable to the right of the hotend heating assembly to facilitate subsequent placement of the cable in the right cable channel.
Install the new hotend heating assembly, carefully insert 3 screws (M3*10) and tighten, while ensuring that the upper part of the hotend heating assembly is against the white alignment line of the toolhead.
2. Install the right cable cover
Carefully pass the hotend heating assembly cable through the right cable channel and push the cable cover back in the direction shown in the figure.
3. Install the extruder
Secure the extruder to the toolhead using the 4 screws, as shown in the image below.
4. Re-connect the cable
Re-connect the магазин Bambu Lab cable as shown below.
Note: If you disconnected the part cooling fan cable during disassembly, you will also need to connect the fan cable to the TH board at this time.
5. Install the toolhead rear housing
Simply align the two brackets on the rear housing towards the top, then push it until you hear a few clicks.
6. Install the hotend and silicone sock for hotend
Follow the guidance available on the extruder sticker to re-attach the hotend to the toolhead
Then, lock it in place using the clip and install the silicone sock.
Note：
image
Fasten the heating assembly correctly Fasten the heating assembly incorrectly
7. Install the toolhead front cover
Simply attach the toolhead front cover on the top of the toolhead by aligning the clips, then gently push on the bottom side. You will hear the clips when the installation is complete.
Verify the functionality of the A1 hotend heating assembly
To ensure everything runs smoothly, set the hot end temperature to 100°C. If successful, the screen will show the temperature.
Calibration step after the operation
We recommend conducting a full calibration of the printer after this operation.
Additionally, it's strongly advised to wash the PEI textured plate before use, as it may have been contaminated during this process.
Potential problems and solutions
If you encounter problems during the installation of a new Hotend Heating Assembly, please check the potential problems and solutions listed below:
The hotend temperature is 0℃
Check the Hotend Heating Assembly connector and confirm it is correctly inserted, as shown in Re-connect the cables
It is important to carefully align the connector pins to the TH Board.
If the issue persists, the thermistor wires might have been damaged (white wires).
The hotend cannot be heated
Check the Hotend Heating Assembly connector and confirm it is correctly inserted, as shown in Re-connect the cable
It is important to carefully align the connector pins to the TH Board.
If the issue persists, the heater wires might have been damaged (Translucent wires).
First layer inconsistency/first layer print issues
Make sure the screws of the hotend heating assembly are tightened and turn on the heatbed for leveling before printing.
Click here for the solution.
End Notes
To ensure a safe and effective execution, .