Before I bought a good 3D printer, I built one myself.
The base was an Anet A8. I first assembled the Anet A8, then printed parts for the new printer. I mounted the new parts on the Anet A8. Then I printed better parts again and swapped them for the old ones.
I also designed and built a new frame myself.
I also attached a STEP file with the fully assembled printer.
Maybe someone can use the data.
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Designed with the help of FreeCAD, made possible by the dedicated efforts of its community.
The author marked this model as their own original creation.