Optocoupler (optical) autolevel sensor (manual)

thingiverse

The optocoupler in question can be sourced from the following AliExpress link: https://aliexpress.com/item/speed-sensor-Tacho-sensor-Slot-type-Optocoupler-Tacho-generator-Counter-Module-for-Arduino-for-Raspberry-pi/32694762407.html. This manual will guide you through the process of using a homemade probe. To create this tool, you'll need a long nail with a small head that can move freely up and down. For further clarification, refer to the video at https://youtu.be/bNcJHx43wCU. The repeatability of this manual probe is impressive, measuring 0.003mm in tests. For use with Marlin, follow these steps: 1. Insert a nail into the probe. 2. Perform a G28 and G29 command, then pause (M0). 3. Remove the nail from the probe. 4. Press the print button to initiate printing.