| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that a period between a warning display of a near-end state and an actual end state is long, causing the warning display of the near-end state to continue for a long time.SOLUTION: If an operation request is a print request, a print operation is executed to add a print-time jetting amount. If an operation request is a cleaning request, a cleaning operation is executed to add a cleaning-time jetting amount. In a case where a predetermined measurement period (a near-end threshold calculation period) elapses, a consumption amount for a specified period (a near-end period) is calculated from a measured consumption amount to store, and a near-end threshold is changed on the basis of the stored consumption amount for the specified period. |
