Z Calibration Flags

thingiverse

These flags are installed at the top of the Z axis lead screws on a Prusa-style printer. They serve as a fast calibration indicator. When stepper motors aren't powered, it's effortless to move them and the printer's calibration will be off. After calibrating and leveling the bed, position both flags so they point in the same direction. At the start of each printing session, you can rapidly check the calibration flags.