Calibration square and tower
thingiverse
Forget the 20mm calibration cube. An error on 20mm will be 10 times as bad over the length of your bed. This is a simple 100mm square in the X and Y axis. It also makes the eStep calibration easy math. Next is a 50mm tower for they Y axis calibration. Again, it makes the math easy. Please let me know if you like this!
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