The X400/X400+/X500 3D printers have incorporated numerous industry-standard safety features and additional ones found necessary by 3D Labs to make your machine as safe and reliable as possible.
However, a defect or component failure can occur with any machinery. For this reason, 3D Labs requires that personnel are present during the operation of the 3D printer at all times.
Never leave your 3D printer unattended. Any damage to the printer or property that occurs while left unattended is the responsibility of the customer. Doing so is at your own risk.