Connect AMS Hub and multi-AMS

Before you start, please refer to the AMS introduction to get familiar with the AMS. You also need to read Notes for AMS in advance to know some precautions.

Video tutorial

Connecting the AMS Hub to the printer

Please remove the buffer from the back of the printer (if applicable) and install the AMS Hub, as shown in the image below. Once the AMS Hub has been installed, proceed to connect the PTFE tube from the Hub to the PTFE coupler.

Please ensure that the PTFE tube runs under the spool holder and not over, as shown in the image below. 

The spring within the Hub should not be stuck/compressed. Please ensure that it moves freely within the Hub.

Connect the Hub to the printer with the Bambu Bus 4-Pin Cable:

Note: When connecting the 4-pin cable, make sure it is in the right orientation. If you are using an L-shaped plug cable, pay attention to its text prompts. If you insert the 4-pin cable in the wrong direction, it may cause the printer and AMS mainboard to burn down.

Connect AMS to the AMS hub

Connect the cables

Connect the most frequently used AMS to the AMS Hub and turn on the printer, and then proceed to connect the remaining AMS to the other 6Pin port of the previous AMS.

Kind reminder: 

Our store sells two types of 6-pin bus cables, with lengths of 510 mm and 1500 mm respectively. (510 mm, commonly used for connecting between the buffer and AMS; 1500 mm, widely used for connecting between the Hub and AMS). 

If you need a longer 6-pin bus cable, please purchase it from our online store

Connect the PTFE tube of AMS to Hub

Having the correct PTFE Tube length is important. We suggest having it as short as possible without over-bending it to reduce AMS feed resistance and load/unload time:

Note: When connecting multiple AMS to the Hub, it is recommended that the longest PTFE tube be no more than 3.5m. Too long a feeding path may cause too much resistance and affect the normal loading and unloading of the filament. Also be careful not to bend the PTFE tube so much that it causes extra resistance.

Check if the connection is successful

Now that the installation is complete, please check your printer to see if the Hub and the additional AMS units were correctly installed, please see the image below as an example of a successful setup. 

And you can refer to this wiki to start multi-color printing: multi-color printing operation guide


1. AMS ID assignment

Each AMS is assigned an ID, which is displayed on the screen. The logic for assigning AMS ID is to easily identify the connection between them, e.g., AMS1 is directly connected to the AMS Hub, AMS2 is connected to AMS1, and so on.  

Do note that you will need to connect them individually to be able to assign the ID in order. Please ensure you keep the printer on while doing this

However, if you connect multiple AMS units in advance and then connect to the AMS Hub at the end, or you connect all AMS to the hub before powering on the printer, it will randomly assign IDs to these AMS.

AMS1 connects to the Hub, and then AMS2 connects to AMS1

The AMS has a “mapping” function (refer to multi-color printing operation guide), so the ID of AMS will not affect the new printing, but the built-in model will be affected. Please refer to Tip 2.

1.1 How to reassign the AMS ID

The AMS ID will be saved and not cleared even if the machine is turned off. You can reset the AMS ID as shown below, please disconnect the AMS cable after clicking this button.

2. Printing the built-in model

Currently, printing the built-in models only supports printing start from slot 1 of AMS1, with no support for mapping to other slots. You will need to place the filaments into the AMS slots from left to right according to the prompt on the print launch page:

How to clean the AMS hub | Bambu Lab Wiki

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