Circal: First Layer Z-offset Calibration Circle

thingiverse

TL;DR: Simple yet fast calibration method with a 35mm diameter circle containing text similar to Benchy. This model provides a rapid but effective first layer calibration technique. The design is just 0.2mm tall, so at a layer height of 0.2mm it will print only one layer. # Features - Circles (more suitable for calibration than squares since they engage both X and Y axes simultaneously) - A diameter of 35mm (each circle prints in approximately two minutes) - Two circle options without and with text (similar to Benchy's first layer text, but much faster to print) # Instructions Each circle takes about two minutes to print, so you can place several circles around the build plate when you are slicing the model. ### For Z-offset calibration Begin with a small number of circles. During printing, adjust the z-offset for each circle and record the z-offset value used for each circle. After the circles have printed, remove them from the bed and compare the first layer to determine the ideal z-offset. - The lines forming the circle should be fused - There should be no gaps between lines - If you try to pull it apart, it should hold together like a sheet of paper I aim to maintain the nozzle at its highest possible position while still achieving proper fusion of layers. You will be getting closer to the correct value when making z-offset adjustments 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.