First Layer test pattern and torture test

thingiverse

I created this design to thoroughly test my Ender 3 printer as I had been noticing some peculiar marks on my prints lately. The shape was carefully designed to be printed in a single line, making it an ideal visual guide for checking if your print bed is level. It also proved itself to be very effective at revealing dirty spots on my PEI surface. You can modify the wall lines in your slicer to shorten or lengthen the test as needed. Additionally, if you just want to verify that your bed is level, simply stop the print before it begins to do the infill.