Bambu A1 Y-Axis Cable Chain - Bed Cable Chain - Rear Cable Chain - Angled Twist Version

2025/8/13 v1.2.2a update, recently some users in the comments section reported that the cable chain sags and rubs against the chain. I slightly increased the upward tilt angle of the power end base, moving the cable chain further away from the heated bed.

Furthermore, I thickened the heated bed end fastener, lengthened the stiffeners, and set the overall infill to 65% (of course you can set a higher value). Actual testing shows that PETG printing provides better strength than PLA.

Another user reported that the screw length was insufficient (m3x12mm). My tests showed it could be installed. However, I still added countersinks to the screw holes.

Final effect diagram:

After installation, manually move the print head repeatedly to observe if the printed part interferes with the tool head, and then run "Printer Calibration". Currently, no interference has been observed. I apologize for previously releasing an immature model.

If there are any other issues I haven't considered, please feel free to give me feedback!

2025/7/17 v1.2.1 update, since v1.2 had more supports, I slightly modified the model to use fewer supports.

Remove the original heated bed screws and install using m3x12mm hex socket screws.

2025/7/17 v1.2 update, thickened the heated bed end fastener and added stiffeners. The modified parts are shown in the figure below.

2025/7/12 v1.2 update, added the heated bed end fastener!

At the beginning of the model's release, a user asked if a heated bed end fastener could be added. Due to being busy recently, this plan was put on hold. In subsequent use, some users commented that the cable chain would rub against the plastic plate under the heated bed during printing. However, since I didn't want to use self-tapping screws to make damaging modifications to the existing heated bed, I kept thinking about how to do it.

When I shared my A1 enclosure plan, a user shared his self-starting exhaust fan [2] (for A1 enclosure), which made me realize that there are several screw holes under the heated bed. So, I started designing the heated bed end fastener. Consistent with the cable chain base, I also adopted a tilted design. Below is a schematic diagram of the installed part:

This is the cable chain stretched to its longest extent, moving smoothly:

Note: The cable chain base of v1.0 and v1.1 will interfere with the heated bed fastener added in v1.2 during printer operation, so the v1.2 cable chain base has been slightly modified. Users who have already printed v1.0 or v1.1, please be sure to replace the new version of the cable chain base when adding the new heated bed fastener.

Still lacking modeling experience, printed a bunch of unusable ones again:

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Encountered some problems when using author Kai's Y-axis cable chain [1]:

1. The heated bed fixed end does not have three corresponding screw holes, and self-tapping screws should be used. Since I did not want to use self-tapping screws on the heated bed end, I gave up on fixing it.
   

   

   Image from [1] comments section.

   2. Due to abandoning the fixation on the heated bed end, the wires tend to fall towards the Z-axis side, leading to wear and creaking friction noise in the cable chain during subsequent printing operations.
   3. The vertical Y-axis cable chain requires more space at the rear.

Therefore, to solve the above problems, I designed a new Y-axis cable chain following the angle of the Y-axis cable in its original state. The head of the new cable chain base is curved, which better conforms to the curvature of the wires. And the last link of the heated bed end cable chain has been cut and chamfered. The schematic diagram is as follows:

This cable chain requires less space at the rear, and no creaking noise occurred in subsequent printing operations. Removing the heated bed fixed end, I personally feel that the sacrifice to aesthetics is not significant.

I'm a beginner, learning and modeling at the same time, printed many unusable versions hahahahaha