事情是这样，我前几天在热床调平上遇到了困难。3D打印机（Bambu P1S）的自动调平功能似乎不起作用，造成了严重的首层打印缺陷，于是我只能使用手动调平来让热床恢复平整。在经过数次尝试手动调平之后，打印机终于恢复了正常！但我需要一个测试模型来验证调平的效果，于是我制作了这个首层测试模型。这个测试模型能用于P1P和P1S（也许X1也能使用？）。
So here's the thing, I ran into some trouble with bed leveling a few days ago. The auto-leveling feature on my 3D printer (Bambu P1S) didn't seem to be working, which caused some serious first layer printing issues. As a result, I had to resort to manual bed leveling to get the heat bed back to being flat. After several attempts at manual leveling, the printer finally returned to normal! But I needed a test model to verify the effectiveness of the leveling, so I made this First Layer Test model. This test model can be used for P1P and P1S (maybe X1 as well?).

我希望测试尽可能苛刻，所以我将模型尽量延伸到了热床的边缘，覆盖了91%的打印面积，以便于完整地观察调平的效果。尽管我努力地将热床调平，并且还有自动调平功能的辅助，模型边缘处可能仍然会出现一些打印缺陷，因此我称这个测试为“地狱难度”。如果你能非常完美地将测试模型打印出来，那么恭喜你！打印其他模型会变得更加顺利。
I hope the test to be as rigorous as possible, so I've extended the model as close as I can to the edges of the heat bed, covering 91% of the printing surface, in order to fully observe the effects of the leveling. Despite my diligent efforts to level the heat bed, and with the assistance of the automatic leveling feature, there may still be some printing imperfections at the edges of the model. For this reason, I refer to this test as "Hell Difficulty." If you are able to print the test model flawlessly, congratulations! You will be able to print other models more successfully.

这个首层测试模型还具备清洁打印板的功能。如果你在前后两次打印里使用了不同颜色的耗材，那么最好用首层测试模型来对打印板做一次全面清洁，用新的耗材把打印板上面残留的旧耗材覆盖，然后粘下来，就像脱毛蜡纸那样。
This First Layer Test model also has the function of cleaning the build plate. If you use different colors of filament for two consecutive prints, it's a good idea to use the First Layer Test model to give the build plate a thorough cleaning. Cover the old filament residue on the plate with new filament and then peel it off, just like using waxing paper for hair removal.