Pen height calibrator for pen plotter

When using a pen plotter, it's quite important to set your pen height consistently. This simple gauge is meant to let you do just that. The lowest spot is 1mm tall, with each successive step 0.5mm taller. Just set it under your pen holder, let the pen drop on the desired step, and lock it in. Consistent every time. The 3mf is set to very fine layer height so as to get a fairly precise height.