NavigationCMM supportCMM knowledgebaseLegacy productsREVO legacy headREVO user's guide - legacyMaintenanceOptical windows maintenanceRack port maintenanceStyli maintenanceSFA maintenanceNavigationCMM supportCMM knowledgebaseLegacy productsREVO legacy headREVO user's guide - legacyMaintenanceOptical windows maintenanceRack port maintenanceStyli maintenanceSFA maintenanceSFA maintenancePeriodically visually inspect the SFA for scratches.