DIY Probe, OptiServo Z-Probe Sensor - 18mm mounting

thingiverse

With some spare parts, you can build an accurate probing sensor that rivals commercial units. This DIY sensor can probe against every material and features a large probing stroke, providing ample room between the nozzle and bed. In my case, GCode M48 ; “ Z-Probe Repeatability Test” returns these results: Mean: 0.002250 Min: 0.000 Max: 0.008 Range: 0.008 Standard Deviation: 0.002359 These statistics are more than sufficient for accurate auto leveling. Check out this short video showing the sensor in action. You'll need: 1x Micro Servo (e.g. TowerPro SG90) Carbon/Fiber Rod (3mm outer diameter, Length about 35mm) for probing Optical Endstop (standard reprap) for measuring 2x: M3x16 screws, nuts and washer to secure probe against DistanceBridge.stl 2x self cutting screws(2x8) for mounting the servo against the base 1x self cutting screw(2x5) to secure the probe guide (it’s a snap fit, you might not need this one) M3 mounting screws to attach the probe to your hotend Installing & configuring the probe precisely and with caution is crucial so that you don't damage your printer and/or hotend. Take care and double check at least twice. Disclaimer: I’m not responsible for any damage that will occur based on these steps above. For detailed instructions, please see the post-printing section below. Files & more are available in [Onshape](https://cad.onshape.com/documents/5978c36dc0ca21b99f599a2a/w/75a8ba594cae1145e1d0b6a2/e/51a3e3922bd20df9f2915f5f) and **STEP** files are attached. Credits for servo cad model and optical sensor fly to: Matheus Frasson - https://grabcad.com/library/sg90-micro-servo-9g-tower-pro-1 J-Max.fr - https://grabcad.com/library/opto-endstop-tcst2103-1 Please don't forget to post a **make** if you have one!