circle test for level of delta/ prusa print bed. use filament or marker. only 1 z level high

thingiverse

Designed specifically for users who require pen tests or filament level checks on their printers, this tool is perfect for operation and calibration at any skill level. To get started, you can either input G-Code directly into the system or compile your own code from an STL file using OpenSCAD, which is conveniently included. This prints a single layer of high precision for effective bed level testing of pens and filament. Suitable for use on both Delta printers and Prusa Mendel machines running on standard Cartesian configurations, the tool offers a versatile range of print variants to accommodate various printer types. In development phase until more users test and validate its effectiveness, it still activates the extruder via G-Code commands during operation. As such, loading filament into the printer is not recommended prior to starting a level check with this tool; alternatively, your printer should already be at operating temperature when conducting the assessment.