| 摘要 |
Printing systems and methods of operating printing systems are described. In but one embodiment, a printer comprises one or more processors, a print media tray for supporting a supply of print media, and a sensor operably associated with the print media tray. The sensor is configured to ascertain a measure associated with an amount of print media in the print media tray. The processor and the sensor are configured to ascertain, from the measure provided by the sensor, a number of remaining sheets of print media. In another embodiment, the sensor comprises a sonar sensor that is operably associated with a paper tray that holds a supply of paper. |
