Needle Gauge

thingiverse

This device measures your print-bed's level and flatness. The gauge swings up and out of the way when not in use, mounted on a hinge. It fits printers like Ordbot and Prusa i3. You'll need 1x M3x12 Allen head bolt, 1x M3 nylock nut, 2x M3 washers, and 4x 1/8" x 1/16" neodymium disc magnets for assembly, along with some epoxy. Optional additions include model paint or nail polish for highlights and adhesive for a white cardstock background. A drill, Allen wrench, and box end wrench are needed for installation. To use it, zero the Z-axis, raise the probe, move to your desired point, lower Z until the needle aligns, take note of the Z value, then adjust as needed.