Circal: First Layer Z-offset Calibration Circle

thingiverse

TL;DR: 35mm diameter circle with text inside similar to a Benchy This model provides is a simple but fast and effective first layer calibration method. The model is 0.2mm tall so at layer height of 0.2mm it will print just 1 layer. # Features - Circles (generally better than squares for calibration since they engage both X and Y axes simultaneously) - Diameter of 35mm (each circle prints in just ~2 minutes) - 2 circle options without and with text (Similar to a Benchy's first layer text but much faster to print) # Instructions Each circle takes about 2 minutes to print, so you can place several circles around the build plate when you are slicing the model. ### For Z-offset calibration Start with a low number of circles. During the print, change the z-offset for each circle and make note the z-offset value that was used for each circle. After the circles are printed remove from the bed and compare the first layer to find the ideal z-offset. - The lines that make up the circle should be fused - No gaps in between lines - If you try to pull it apart it should hold together like it's a sheet of paper. I aim for keeping the nozzle the highest possible while still getting the a proper fusing of the layers. You will be getting closer to the right value when you are making z-offset adjustment as small as 0.02mm between circles. The text is also an indication, it should be clearly readable and well defined. ### 1st Layer Adhesion For a more general first layer adhesion test spread circles across a wide range of locations (corners, middle, etc) on the bed and let it print.