Image forming apparatus and image forming system

An image forming apparatus comprising:

• an apparatus main body;
• a conveyance unit configured to detachably attach to the apparatus main body and to include a rotating member that conveys at least one sheet;
• a sheet detection unit configured to detect a sheet;
• and
• a control unit configured to:
• obtain a time from when each sheet of a plurality of sheets to be conveyed is fed to when each sheet of the plurality of sheets reaches the sheet detection unit, and
• control output of a notification of information in a case where a conveyed sheet jams in a section in which the time is less than a predetermined threshold value, when the conveyance unit is not normally attached to the apparatus main body.

An image forming system comprising:

• an image forming apparatus;
• and
• a server that communicates with the image forming apparatus via a network,
• wherein the image forming apparatus includes:
• an apparatus main body;
• a conveyance unit configured to detachably attach to the apparatus main body and to include a rotating member that conveys a sheet;
• a driving source configured to generate a driving force for driving the rotating member;
• and
• a control unit provided in either one of the image forming apparatus and the server, and
• wherein the control unit is configured to:
• obtain a load of the driving source corresponding to each sheet of a plurality of sheets to be conveyed to the image forming apparatus, and
• control output of a notification of information in a case where a conveyed sheet jams in a section in which the load of the driving source is less than a predetermined threshold value, when the conveyance unit is not normally attached to the apparatus main body.

An image forming system comprising:

• an image forming apparatus;
• and
• a server that communicates with the image forming apparatus via a network,
• wherein the image forming apparatus includes:
• an apparatus main body;
• a conveyance unit configured to detachably attach to the apparatus main body and to include a rotating member that conveys at least one sheet;
• a sheet detection unit configured to detect a sheet;
• and
• a control unit provided in either one of the image forming apparatus and the server, and wherein the control unit is configured to:
• obtain a time from when each sheet of a plurality of sheets to be conveyed is fed to when each sheet of the plurality of sheets reaches the sheet detection unit, and
• control output of a notification of information in a case where a conveyed sheet jams in a section in which the time is less than a predetermined threshold value, when the conveyance unit is not normally attached to the apparatus main body.