3x3 Calibration Grid - Prusa Mk2.5/Mk3

thingiverse

Use this Grid to optimize first-layer adhesion quickly and efficiently. The G-code file includes a warmup routine that improves bed-leveling accuracy right from the start. At first, the print might seem like it's doing nothing for about a minute or two as the PINDA probe warms up by sitting close to the heat bed. If printing doesn't get underway, the ambient air temperature is probably too cold or drafty. Try covering the PINDA with a folded sheet of paper or some aluminum foil to insulate it from drafts. Once printing starts moving along smoothly, remove the insulation.