Sheet media jams are detected along a media transport path by one or more vibration sensors that capture mechanical movements of components along the path that interact with the sheet media for driving or guiding the sheet media along the transport path. The detected vibrations during the advancing of the sheets are analyzed for distinguishing between detected vibrations associated with normal handling of the sheets and detected vibrations associated with abnormal handling of the sheets. An error condition can be signaled to a control system in response to distinguishing the detected vibrations associated with the abnormal handling of the sheets.

Upon occurrence of a paper jam at a circulation conveyer with a switching direction being set at a paper discharge guiding direction, a controller performs control of maintaining the switching direction at the paper discharge guiding direction and discharging sheets at a section of the circulation conveyer downstream of a position of the paper jam, the printing conveyer, and the paper discharger. Upon occurrence of the paper jam with the switching direction being set at a circulation guiding direction, the controller performs control of switching the switching direction to the paper discharge guiding direction after a sheet passing a switch exits the switch, and discharging the sheets at the section of the circulation conveyer downstream of the position of the paper jam, the printing conveyer, and the paper discharger.

A printer control method prevents the user from repeatedly executing an error recovery operation when a cutter error occurs. The printer 2 has a cutter 22 that moves a movable knife 32 between a home position HP and cutting position CP and cuts recording paper 6 at the cutting position CP. When a cutter error in which the movable knife 32 does not return from the home position HP is detected (step ST5), the host device 3 reports a cutter error (step ST6). When the printer 2 executes a cutter error recovery operation (step ST9) and again detects a cutter error (step ST5), it detects a non-recoverable error as being unable to recover from the cutter error (step ST10), and reports the non-recoverable error (step ST11).

A method and print system for stopping the print system are disclosed. The print system includes a control unit for controlling the printing of sheets, a print engine for printing recording material on the sheets, an input tray for holding sheets to be printed upon, and a finishing unit. The method includes scheduling printing and finishing of a plurality of sheets, including sending a sheet request from the control unit to the finishing unit, and upon receiving the sheet request, the finishing unit provides an earliest expected arrival time of a sheet at the finishing unit to the control unit. When this time is too huge, operator intervention is required and the finishing unit reports an error to the control unit, after a previous sheet has been deposited in the finishing unit, and the control units stops the print engine before the sheet leaves the input tray.

Provided is an image forming apparatus capable of presenting to a user movies that show operation steps for solving a maintenance event occurring in the apparatus without increasing the number of times the user needs to perform the operation of playing the movie. A CPU is configured to play a combination of a plurality of movies as a series of movies that show operation steps for solving a maintenance event occurring in the image forming apparatus. The CPU is further configured to determine a stop point at which the series of movies that is playing stops playing, based on stop point information set for each of the combination of the plurality of movies. The CPU is further configured to stop the series of movies that is playing at the determined stop point.

Sheet media jams are detected along a media transport path by one or more vibration sensors that capture mechanical movements of components along the path that interact with the sheet media for driving or guiding the sheet media along the transport path. The detected vibrations during the advancing of the sheets are analyzed for distinguishing between detected vibrations associated with normal handling of the sheets and detected vibrations associated with abnormal handling of the sheets. An error condition can be signaled to a control system in response to distinguishing the detected vibrations associated with the abnormal handling of the sheets.

Sheet media jams are detected along a media transport path by one or more vibration sensors that capture mechanical movements of components along the path that interact with the sheet media for driving or guiding the sheet media along the transport path. The detected vibrations during the advancing of the sheets are analyzed for distinguishing between detected vibrations associated with normal handling of the sheets and detected vibrations associated with abnormal handling of the sheets. An error condition can be signaled to a control system in response to distinguishing the detected vibrations associated with the abnormal handling of the sheets.

Sheet media jams are detected along a media transport path by one or more vibration sensors that capture mechanical movements of components along the path that interact with the sheet media for driving or guiding the sheet media along the transport path. The detected vibrations during the advancing of the sheets are analyzed for distinguishing between detected vibrations associated with normal handling of the sheets and detected vibrations associated with abnormal handling of the sheets. An error condition can be signaled to a control system in response to distinguishing the detected vibrations associated with the abnormal handling of the sheets.

A jam detection section detects a sheet jam on a conveyance path based on results of detection by a sheet detection sensor. A printing stop section stops an image formation operation upon the sheet jam detection by the sheet jam detection section. Upon detection of completion of an operation of resolving the sheet jam by a user by a resolving operation detection section, a sheet breakage confirmation section judges, for the sheet taken out from the conveyance path by the user in the operation of resolving the sheet jam and then loaded on a document stand, whether or not there is any sheet lacking portion, based on image data generated by an image reading section. The stopping release section, upon judgment by the sheet breakage confirmation section that there is no sheet lacking portion, permits execution of image formation.

An image processing apparatus performs recovery processing for recovering a reading error when a predetermined condition is satisfied. The image processing apparatus includes a reading unit configured to read a document, a printing unit configured to print an image of the document read by the reading unit, and a processing unit configured to perform recovery processing for recovering a reading error by the reading unit if a mode for concurrently implementing the reading by the reading unit and the printing by the printing unit is not set.