Z-axis inductive sensors for Cheap Chinese 3D Printers: 6-36v & 10-30v sensors work on 5v power
У вашего броузера проблема в совместимости с HTML5
Tom's Video about auto-leveling sensors: https://youtu.be/il9bNWn66BY
A Neodymium magnet falling through an aluminum tube: https://youtu.be/RBN_cYEgeMA