Patent ID: 8155550

Claim:
A printer engine that receives a command from a controller that issues commands representative of a plurality of kinds of instruction, and that executes an image formation according to the command, the printer engine comprising: a judgment unit that judges whether an adjustment of an image formation condition is necessary based on a state of an inside of an image forming apparatus; and a control unit that transmits to the controller a request for executing the adjustment of the image formation condition based on a judgment of the judgment unit, and that transmits to the controller factor information according to a factor of execution of the adjustment of the image formation condition, wherein (i) in a case in which a factor, indicated by the factor information, of execution of the adjustment of the image formation condition is not set in advance in the controller, execution of the adjustment of the image formation condition is not issued from the controller to the printer engine, and (ii) in a case in which a factor, indicated by the factor information, of execution of the adjustment of the image formation condition is set in advance in the controller, an execution command for the adjustment of the image formation condition is issued from the controller to the printer engine so that the printer engine executes the adjustment of the image formation condition when the execution command is issued from the controller.