Solid Z-End Stop – Adjust in Software

thingiverse

Stop fidgeting with your Z end stop! Tired of adjusting it for 0.1mm precision? Here's a software solution that eliminates the need for mechanical adjustment forever. This method works with Pronterface, Slic3r, and Marlin firmware, but your printer bed must be flat and level. First, mount your end stop as solidly as possible. Ensure there are only a few millimeters between the nozzle tip and the bed when the Z-axis is homed. This will create a rigid mount with no mechanical adjustment required. To adjust your solid Z-axis end stop: home the Z-axis, place a thin piece of paper under it, and lower it 0.1mm at a time until there's drag on the paper. Record this distance as your offset value. In Pronterface, go to Settings/Slicing Settings and navigate to Printer Settings. In the Custom G-code line, add a new line right after "G28 ; home all axes" that uses the G92 code and your measured offset value (e.g., "G92 Z2.5 ; Z offset downward"). That's it! You've successfully adjusted your Z-axis without any mechanical fiddling. To change the value, simply edit it in the config file. Remember to reslice whenever making changes! For extra precision, you can experiment with different offset values. If using a less accurate measurement, adjust the value downward until satisfied. Always reslice after making changes. Note: If your home position is more than 3mm above the bed, Marlin firmware may need modification. In Configuration_adv.h file, find "Z_HOME_RETRACT_MM" and adjust the value to be about two millimeters larger than your measured distance. Rebuild and reload Marlin for optimal performance. Say goodbye to mechanical Z end stop adjustments!