The heatbed of the Bambu Lab H2D is calibrated before leaving the factory. Once you have followed the instructions in the Quick Start guide, you can start printing directly. However, in cases where the heatbed is affected during transportation, resulting in auto-leveling failure, or if the heatbed needs to be disassembled or replaced for maintenance purposes, it is important to ensure that the heatbed is flat using the bed tramming method.
¶ Prepare for Bed Tramming
¶ Required tools:
- Required tool: you need to find a 90-degree bent H2.0 hex wrench(It would be more convenient if a ratchet wrench could be used.).
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¶ Download the leveling G-code
- Download the included G code file and copy it onto the USB flash drive.
h2d_manual_bed_screws_adjust_assist.gcode；
After the download is completed, you need to copy the Gcode file to the root directory of the USB flash drive.
¶ Switch the nozzle to the right nozzle.
- You need to switch the nozzle assembly to the right nozzle otherwise there will be interference when adjusting the heatbed screws.
¶ Clean the heatbed and nozzles
- You need to remove the print plate and ensure that the surface of the heatbed is clean.
- Make sure that the nozzle is clean and there is no material on it. If necessary, heat the nozzle and wipe it to ensure its cleanliness.
¶ Loosen the fixing screws of the heatbed
- You need to loosen 7 fixing screws in advance; 4 screws on both sides of the heatbed (loosen each side by one full turn), and 3 screws at the bottom.
Note: For the heatbed, loosen the 7 fixing screws only. Do not remove them completely as it would make it difficult to install the screws later.
Display of the positions of 4 screws on both sides of the heatbed
The figure below shows the positions of the screws on the side of the heatbed. The left and right glass panels have been removed for this view; however, during normal manual leveling, it is not necessary to remove the glass panels on the left and right sides.
Before loosening the screws, you can appropriately raise the heatbed to prevent interference with the auxiliary part cooling fan on the left side.
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| Left front | Right rear |
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| Right rear | Right front |
Next, you need to loosen the bottom screws and the three fixing screws.
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After completing the process, you can press down on each of the four corners of the heatbed one by one to test whether the fixing screws of the heatbed have been properly loosened. At this point, the heatbed should be able to be pressed down and spring back up.
¶ Start the Bed Tramming
Next, insert the USB flash drive into the card slot of the printer. After it is recognized, select the aforementioned G-code file and click on "Start Printing".
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First, the toolhead will move to the front left corner of the heatbed and wait for 30 seconds. During this time, you can adjust the nozzle so that it is close to the heatbed.
Note: When you notice that the heatbed starts to descend actively, please immediately stop the leveling operation and remove the hex wrench, because at this moment the toolhead is about to move.
Reminder: Tightening the leveling screws clockwise will increase the distance between the heatbed and the nozzle; conversely, loosening the leveling screws counterclockwise will make the heatbed closer to the nozzle.
You can use a sheet of A4 paper to slide between the nozzle and the heatbed to check the distance between them.
The nozzle will then move to the front right corner of the heatbed. Repeat the adjustment process to ensure that the heatbed is just barely not touching the nozzle. Next, move to the rear right and rear left corners of the heatbed, and complete the adjustments using the same method.
After confirming that the adjustment is completed, please tighten the 4 screws on the left and right sides of the heatbed and the 2 screws at the bottom (the one near the front door does not need to be tightened after leveling), to avoid changes in the height of the heatbed during subsequent use.
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| This screw does not need to be tightened after leveling and can be kept loose. It is added for transportation protection. Tightening it may cause the heatbed to bulge. |
¶ Calibration
From the printer screen, touch Settings > Calibration > Print Calibration >Auto Bed Leveling to start the calibration. If everything looks good and no errors or warnings appear during the calibration, the leveling was successful. If there are still problems, contact the service team for further assistance.
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¶ End Notes
We hope the detailed guide provided has been helpful and informative.
To ensure a safe and effective execution, if you have any concerns or questions about the process described in this article, we recommend submitting a technical ticket regarding your issue.
Please include a picture or video illustrating the problem, as well as any additional information related to your inquiry.