# How common are missed steps? **URL:** \ **Category:** Original/PRO Series (Buildbotics) (Gen 1)\ **Created:** [January 24, 2023, 5:21pm UTC](https://forum.onefinitycnc.com/t/how-common-are-missed-steps/18352 "2023-01-24T17:21:09Z")\ **Posts on this page:** 1\ **Showing post:** 22
**Author:** ![349iq2345](https://avatars.discourse-cdn.com/v4/letter/3/bb73d2/32.png) [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)\ **Post date:** [January 25, 2023, 8:45pm UTC](https://forum.onefinitycnc.com/t/how-common-are-missed-steps/18352/22 "2023-01-25T20:45:44Z")
Hey Forrest, here you can see how different materials trigger the inductive proximity sensor [Omron E2B](https://www.ia.omron.com/products/family/3203/) which was available at my local CNC equipment supplier. ![Omron_E2B__Proximity_Sensors_Datasheet_P010](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/2X/d/d4ea22b72a776b5d248e41a2e264723ce51b0a1e.png) Source: [Omron E2B Inductive Cylindrical Proximity Sensor Datasheet](https://assets.omron.eu/downloads/datasheet/en/v3/d116_e2b_cylindrical_proximity_sensor_datasheet_en.pdf) [Some people also use microswitches](https://forum.onefinitycnc.com/t/few-pics-start-to-almost-finish/6381/19) but I would always prefer using inductive proximity sensors because the contacts will not wear out or attract dust. The problem to solve anyway is how to attach them. As far as I know, everybody I know used 3D-printed parts, as Tom @TMToronto did as shown above. Thankfully Tom published the 3D files [in this thread](https://forum.onefinitycnc.com/t/masso-g3-based-build-f360-pics-and-1f-photos/7107)! An alternative would be milling them out of wood using a CNC (less plastic). [🙂](https://emoji.discourse-cdn.com/apple/slight_smile.png?v=10) #### Further reading - [Using an SN04-N Proximity Sensor as a Limit-Switch](https://buildbotics.com/proximity-sensor/) - [Homing Switch Brackets - For 3rd Party Controllers](https://forum.onefinitycnc.com/t/homing-switch-brackets-for-3rd-party-controllers/4297) --- _[View the full topic](https://forum.onefinitycnc.com/t/how-common-are-missed-steps/18352)._