Roomba Diffusion Lens

thingiverse

**WARNING!** This will void your Roomba warranty, *and turn it into a kamikaze death machine*. **Don't use this** if you have cliffs (stairs, ledges, actual cliffs) where it cleans. Your Roomba might also go places it couldn't go before, and will be a new source of wear and tear for whatever it bumps into. Created to defeat overzealous cliff sensors, which caused my Roomba to shut off any time it brushed up against a rug. This is a common problem with cleaning robots and dark or thick rugs. A low budget solution is to break off the ridged edge of a transparent CD/DVD jewel case and tape pieces of it over the sensors, letting the IR emitter's light reflect back -- but not a lot of people have jewel cases around anymore. I dug deep in the garage and found one to sacrifice, and it worked. I wanted to see if I could print something to do the same, and these seem to work. **To use**: Print enough to cover each sensor; mine has four, fancier models have six, check your model. Print a few extras, so you can pick out the best ones. Tape a lens over each sensor, with the ridged side up (top) facing the sensor. I used painter's tape. **Print the model with a clear filament that has a glass-like refractive index, like Taulman t-glase**. Enjoy your new kamikaze death machine, and don't say I didn't warn you. This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/kuxk2cXVGPp