Josef Prusa on Twitter: "@ChelsC423 Just run calibrate Z. It means the measurements stored in memory differ from the mesh bed leveling. For example if you travel with printer and get the
![Nozzel hit the bed, problem with PINDA sensor( not activated) – Hardware, firmware and software help – Prusa3D Forum Nozzel hit the bed, problem with PINDA sensor( not activated) – Hardware, firmware and software help – Prusa3D Forum](https://forum.prusa3d.com/wp-content/uploads/2020/05/96573610_547499579240659_849812906475257856_n.jpg)
Nozzel hit the bed, problem with PINDA sensor( not activated) – Hardware, firmware and software help – Prusa3D Forum
![name.jo on Twitter: "@Prusa3D What can we do? ERROR: Bed leveling failed. Sensor didn't trigger . Debris on nozzel? Waiting for reset https://t.co/jVDrLRLEgm" / Twitter name.jo on Twitter: "@Prusa3D What can we do? ERROR: Bed leveling failed. Sensor didn't trigger . Debris on nozzel? Waiting for reset https://t.co/jVDrLRLEgm" / Twitter](https://pbs.twimg.com/ext_tw_video_thumb/1061393669926936576/pu/img/4Wxk22FC5W8TbLfd.jpg)
name.jo on Twitter: "@Prusa3D What can we do? ERROR: Bed leveling failed. Sensor didn't trigger . Debris on nozzel? Waiting for reset https://t.co/jVDrLRLEgm" / Twitter
![BUG] FW 3.10 Printer locked up changing mode during XYZ home. · Issue #3197 · prusa3d/Prusa-Firmware · GitHub BUG] FW 3.10 Printer locked up changing mode during XYZ home. · Issue #3197 · prusa3d/Prusa-Firmware · GitHub](https://user-images.githubusercontent.com/53943260/122778854-598aa180-d27b-11eb-9e90-54ccf2fcea97.jpg)