This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/3PwjCvvBlBF
This thing is to calibrate your 3D printer to have the holes and protrusions. This is important if you want parts to be able to fit together.
For example i am using Slec3r 1.2.9 and i had to set the "XY compensation" to "-0.2" (i have a 0.4 nozzle)
kalibracni_model.stl | 151.2KB | |
kalibracni_model_1.stl | 129.1KB | |
kalibracni_model_2.stl | 27.2KB |