Elegoo Centauri Carbon Bed Supports v2

Functional replacement for the OEM support. The original is a glass-filled polymer and had begun to crack on both of my Centauri Carbon systems. A bed crash took out my other mounts. This 3MF is configured to use gyroid infill, two solid layers at every 10th layer, 1mm surfaces, and 5 walls. It should be significantly stronger than the OEM part. This 3MF file contains a profile for generic ASA, but Polymaker ASA was used for the models shown in the photos.

V2 Changes

• Adds right side support

• More precise fit

• Holes corrected for M3 insert

• 5 walls

• More material towards the front for strength/stiffness

V2.0.1 Changes

• Adds back support

• Global slicer settings to enhance strength

Note for 2.0.1: The sensor tab on the back support may need to be painted a dark color (black marker works) if you use a light-colored filament. The optical limit sensor may not work correctly with highly reflective surfaces. This may lead to nozzle crashes or the bed attempting to move beyond its upper limit. 

Thermal Expansion

Problem

With different materials used for these supports/mounts, there will also be varying amounts of thermal expansion. This will change your bed height relative to the nozzle. Unfortunately, the OEM firmware for the ECC1 is fixed at a 60°C calibration. This becomes a bigger problem with printable supports. For example, ASA has a fairly high thermal expansion. If you are printing a material with bed temps much higher than 60°C, you will have both the thermal expansion of the bed AND the supports from a higher chamber temp.  

Mitigations

For those printing a variety of materials, the inability to select a custom leveling calibration temperature has always been a problem on the ECC1. Non-OEM mounts could make this a bigger problem, but that really depends on the properties of the material used to make them. Here are some ways to compensate or otherwise mitigate this. These may also be useful for those maintaining OEM bed supports.

• Heat-soak the printer before leveling. Turn on the bed. Let the chamber temperature get as close as practical to the temperature your material will see during a print.

• Use materials with lower thermal expansion to print these supports. Glass-filled, carbon-filled, and talc-filled materials are best at resisting thermal expansion.

• Standardize on a material that likes 60°C bed temps (like PLA), do your leveling calibration, then apply a per-material offset in the advanced sections of the filament profile. For example, the M290 Z0.1  command will move the Z coordinate (bed) 0.1mm further AWAY from the nozzle. A negative value, such as  M290 Z-0.05,  moves Z CLOSER to the nozzle.

There will be material, and even per-printer variations. As such, obtaining optimal offsets for your printer, material, and environment will require some testing. 

Materials

Recommended filaments:

• PolyLite ASA - This is what I'm using in my printer.

• Polymaker HT-PLA-GF

• West3D Ambrosia PC-ABS - Not an affiliate link. I see them referenced all over 3D-Printing YT. They're local to me! Good stuff, but you need chamber temps around 60C for decent layer adhesion.

This model requires M3 heat-set inserts like these:

300 Pcs M3 Threaded Inserts for Plastic with Heat Set Tip,M3*(3mm-10mm Hight)

Support the effort at no additional cost by using the links in this model listing.

🔧 Material Compatibility Matrix

This matrix outlines recommended materials for this model based on heat exposure, mechanical load, and long-term stability.

Short showing installation and development:

Centauri Carbon Printable Replacement Bed Supports