BigTreeTech U2C (v2.1) Case and Mount for 2040, 4040 Extrusions
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Case and mount for the BTT U2C (v2.1) Canbus board. Mounts to any __40 extrusion.
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Case and mount for the Big Tree Tech U2C (v2.1) canbus board.
Designed to attach to any --40 aluminum extrusion, such as 2040 and 4040 extrusions.
No heat-set inserts used; screws directly into the plastic.
Mounting screws to the __40 profiles cannot be accessed once the board or cover is installed.
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Motivation:
I needed a case that would be compact and allow me to attach the U2C to the main Y-axis 4040 extrusion on my Ender 3 Pro. This case allows just that with flush mounting to the 4040 extrusion at a 90-degree angle with ventilation and access to the CAN bus molex ports in addition to the USB and screw terminals on either side.
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Remixing and Modifications:
I have included all the SolidWorks files required to create the file. The models are dimensionally constrained and fully parametric. Feel free to change any values in the equations tab to suit your needs.
(The geometry isn't fully parametrically constrained; therefore, you may need to modify additional values if you change a singular value.)
If you do not have SolidWorks, I highly recommend OnShape. It is a great alternative with a more modern, Github-like, version control system.
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Print Settings:
| Parameter Name | Value |
|---|---|
| Material | ABS |
| Speed | 200 mm/s |
| Cooling | 0% fan speed |
| Nozzle Diameter | 0.4 mm |
| Layer Height | 0.2 mm |
| Walls | 4 |
| Top layers | 5 |
| Bottom layers | 5 |
| Infill | 40% isotropic (gyroid used) |
This is a functional part, therefore high-strength settings have been used (5 top and bottom shell layers, 4 walls, 40% infill (isotropic).
The U2C converter produces significant heat. DO NOT USE PLASTICS WITH LOW SOFTENING TEMPERATURES (PLA, etc.)
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Post-Printing and Assembly
Assembly Materials:
- 2x M3x25 Bolts
- 2x M3x12 Bolts
- 2x M4x10 T-Nut Bolts and M4x10x6 T-Nuts (Optional, needed if using mount model)
The M3 Tnut bolts and nuts should be used to secure the base to the xx40 extrusion.
The 2 M3 x 12 bolts should be used to secure the U2C board to the base of the U2C case on the corners of the board, where the upper case bolt stems do not come into contact with the board (opposite corners of the case).
The 2 M3x25 bolts should be used to secure the upper case and the CAN bus board to the bottom of the case.
Please use Kapton or electrical tape on the bottom of your U2C converter if you will be mounting the case on your extrusion (in case of bolt loosening and failure). I am not responsible for any short circuits you may cause by not using Loctite on your printer assembly.