NOTES ON ASSEMBLING AND SETTING UP YOUR D12:​
As mentioned in the video, the assembly is not difficult. However, it's important to organize your workspace in advance, identify the parts, and pay attention to the numbers and letters on both the printer and the bags to match the corresponding components.

• The printer comes with many cables and connectors. Most of them are inside the chassis and not visible, but some are loose, particularly those going to the print head and the gantry. Be sure to route these cables to the correct locations during assembly to avoid any pinching or interference with the moving parts of the printer.

• The printer comes with all the necessary tools for assembly and adjustment. There are also some additional tools that may not be needed for assembly but could be useful if you need to disassemble certain parts. Make sure to keep these tools for future use.
• At the end of the assembly, you may have some extra screws or additional components left over. These are typically included as spares in case of loss or other issues. It's a good idea to keep these spare parts in a safe place for future use.
• Indeed, it's normal for the nozzle to have some residue from filament and for the PTFE tube to have minor marks at each end. This occurs because various components of the machine are tested at the factory, especially the print head and extruders. These residues should not affect the printer's performance once it's properly set up and calibrated.
• If you've chosen the Dual version, you can install the second extruder now or at a later time. The printer is designed to work in single-extruder mode by default. However, if you decide to install the second extruder and do not intend to use it, do not connect the filament sensor cable, or alternatively, insert a small piece of filament into it. Without this, the printer won't start, thinking that filament is missing for the print job. This precaution is important to ensure smooth operation when using only one extruder.
• Before starting your 3D printer for the first time, consider lowering the build plate by turning the knobs located underneath it. This precaution is taken to prevent the nozzle from potentially crashing into the build plate and causing damage to the machine. While it may not be strictly necessary, leaving some room for adjustment of the build plate height is a good practice since you'll need to fine-tune the bed leveling later on for optimal printing results.