Bambu Lab Hotend Heating Assembly - H2D

Overview

The Hotend Heating Assembly is designed to heat the hotend and enable quick hotend replacement. The heating assembly secures the hotend with a clamping mechanism, allowing easy removal for maintenance or replacement.

Installation

Learn more about the Hotend Heating Assembly on Bambu Lab Wiki.

In the Box For Hotend Heating Assembly - Left

- Hotend Heating Assembly - Left*1

- Baffle Plate*1

- M2.5-7 Screw*4

- M1.6-4 Screw*2

In the Box For Hotend Heating Assembly - Right

- Hotend Heating Assembly - Right*1

- M3-10 Screw*3

Compatibility

H2D and H2D Laser

Replace H2D Hotend Heating Assembly

This article introduces how to replace the H2D hotend heating assembly

Hotend Heating Assembly

The H2D printer is equipped with two hotend heating assemblies: one for the left hotend and one for the right. These assemblies are not interchangeable. If one is damaged, you must replace it with the corresponding hotend heating assembly. Below are the details of the left and right hotend heating assemblies and their accessories:

Left Hotend Heating Assembly

Left hotend heating assembly (pre-installed with cable sheet) × 1
Wind blocker × 1
M1.6×4 screws (for securing the cable sheet and wind blocker) × 2
M2.5×7 screws (for securing the left hotend heating assembly) × 4

Right Hotend Heating Assembly

Right hotend heating assembly × 1
Insulating sheet × 1
M3×10 screws × 3

Note: Some batches of spare parts include a tube of white electronic silicone. This silicone is not required for the replacement process outlined in this guide and can be discarded or retained for other uses.

Important: Use only H2D-specific hotend heating assemblies. H2D and A1 series hotend heating assemblies are not compatible. H2D hotend assemblies are optimized for the H2D printer, ensuring superior compatibility.

When to Replace

Abnormal hotend heating function
Inability to secure the hotend with the buckle

Required Tools and Materials

New hotend heating assembly (left or right, depending on the situation)
H2.0 Allen key
H1.5 Allen key

Safety Precautions

Critical Warning:

Before performing any maintenance on the printer or its electronic components (including toolhead cables), turn off the printer and disconnect the power supply to prevent short circuits, which could cause additional electronic damage or safety hazards.

During maintenance or troubleshooting, ensure the hotend and print bed are at a safe temperature. If operation at high temperatures is necessary, wear heat-resistant gloves to ensure safe and effective maintenance.

Replacing the Left Hotend Heating Assembly

Removing the Left Hotend Heating Assembly
Step 1: Remove the Left Toolhead Hotend

Switch to the left hotend, turn off the printer, and disconnect the power cable. Remove the silicone sleeve and the left hotend.

Step 2: Remove the Part Cooling Fan and Air Duct

Refer to the following video for instructions

 on removing the part cooling fan and air duct:

Step 3: Remove the Left Hotend Heating Assembly

Use an H2.0 Allen key to remove the four hotend fixing screws (M2.5×7).

Use an H1.5 Allen key to remove the two cable sheet/wind blocker fixing screws (M1.6×4).

Remove the left hotend heating assembly cable from the cable clip, peel off the foam adhering to the TH board, and disconnect the left hotend heating assembly from the TH board.

Caution: When peeling off the foam, pull from bottom to top to avoid tearing or damaging it.

Once the cable is disconnected, remove the left hotend heating assembly completely.

Installing the Left Hotend Heating Assembly
Step 1: Install the Left Hotend Heating Assembly

Align the new left hotend heating assembly and cable sheet with the screw holes on the toolhead. Use an H2.0 Allen key to tighten the four fixing screws (M2.5×7).

Confirm the cable sheet position and use an H1.5 Allen key to tighten the two fixing screws (M1.6×4).

Insert the left hotend heating assembly cables into the cable slots, connect the plug to the TH board, and reattach the foam.

Step 2: Remove the Part Cooling Fan and Air Duct

Refer to the following video  instructions on removing the part cooling fan and air duct:

Step 3: Install the Toolhead Front Cover and Left Hotend
Reinstall the left hotend and toolhead front cover in sequence.

Step 1: Remove the Right Toolhead Hotend

Step 2: Remove the Part Cooling Fan and Air Duct

Refer to the following video instructions on removing the part cooling fan and air duct:

Step 3: Remove the Right Hotend Heating Assembly

Use an H2.0 Allen key to remove the three right hotend heating assembly fixing screws, then remove the cables from the toolhead camera bracket cable clip.

Disconnect the right hotend heating assembly connector from the TH board and remove the insulating sheet.

Installing the Right Hotend Heating Assembly
Step 1: Install the Right Hotend Heating Assembly

Install the new insulating sheet into the toolhead.

Insert the right hotend heating assembly cables into the cable slots.

Ensure the left and right hotend heating assemblies are aligned parallel, then use an H2.0 Allen key to tighten the three fixing screws (M3×10).

After securing the fixing screws, connect the right hotend heating assembly cable connector to complete the installation.

Insert the right hotend cable into the nozzle camera cable slot.

After securing the fixing screws, connect the right hotend heating assembly cable connector to complete the installation.

Step 2: Install the Part Cooling Fan and Air Duct

Refer to the following video or Wiki for instructions on installing the part cooling fan and air duct:

Step 3: Install the Toolhead Front Cover and Right Hotend

Reinstall the right hotend and toolhead front cover in sequence.

Verifying Successful Replacement

Connect the power and turn on the printer. Set the hotend temperature to 220°C on the screen and check if the hotend heats up properly.
If the hotend heats normally, the replacement is successful. If an error occurs or the hotend fails to heat, verify that the TH board connector is properly connected.

End Notes

We hope the detailed guide provided has been helpful and informative.
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