thingiverse
These models were designed in order to allow users to test their first layer adhesion and quality. The model is 0.3mm tall so it should use much plastic, while allowing you to see if your bed is properly leveled or if your leveling sensor is working properly. The model has a 20mm gap between the edge of your bed and the edge of the model in order to avoid clamps and other objects close to the edge.
I have uploaded some models that you can print depending on the size of your bed, but if the size of your bed is not in the list, leave a comment and I will generate a model for you. If I am not around to do it, you can always do it yourself by changing the Bed_X and Bed_Y variables of any of these models and then exporting it:
https://cad.onshape.com/documents/74818a0a723817591d5eb505/w/d45f620e406d2af899f10457/e/301d2b165907eeb45febb033
Direct link to the original creator's page
Click the "View on thingiverse" button above to visit the original model page on thingiverse. You can download the STL file directly from the creator's page for free.
This STL file is compatible with most FDM 3D printers (Creality Ender 3, Prusa MK3S+, Bambu Lab, etc.) and resin printers (Elegoo, Anycubic). Check the original page for recommended print settings and materials.
Yes, this model is available as a free download on thingiverse. Some creators accept tips or donations.
Most STL files can be modified using free software like Blender, TinkerCAD, or Meshmixer. Check the license on the original thingiverse page to see if modifications are permitted by the creator.