Calibration ruler and numbers font for OpenSCAD
thingiverse
A straightforward calibration ruler and numeral font are available in OpenSCAD. Designed with each digit measuring 10x10mm, the monospaced number font is easy to use. To incorporate the font into your project, place numbers.scad in the same directory as your .scad file and import it using "use ;". Verify that your printer's output ruler measures precisely 100x15x1mm for optimal accuracy; although it may not be ideal for Z calibration.
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