Ender-3 z-axis optical endstop

thingiverse

Hi There. This time I'm giving you a handle for an optical z-axis end stop, just like an optic sensor. I used a standard sensor from RepRap, sourced from Aliexpress, with a 3mm gap. Powering the sensor requires +5V, which can be taken directly from the motherboard - exactly as shown in the picture - after fuse FP1. I've checked the option without adding any additional z-axis element and found that the sensor works amazingly well even with the original frame, provided it has a proper width. You can see this in action on the gif.