Abstract: It is determined whether or not a die used for executing designated sheet processing is set to a sheet processing apparatus, and control is performed to stop printing in a case where it is determined that the die is not set.

Abstract: An image forming system includes an image forming device having an image forming section that forms image on a recording medium based on image information and ejects the recording medium; a post-processing device that performs post-processing on a recording medium, the post-processing device having a sheet feeding section to load the recording medium; a power switching device to turn on power to the image forming system; a post-processing operation setting device for setting post-processing dedicated mode to execute post-processing on the recording medium loaded on the sheet feeding section; and a controller that executes startup operation for setting only the post-processing device into an operable state and prohibits startup operation of the image forming section of the image forming device when power has been turned on via the power switching device and the controller has detected that the post-processing dedicated mode has been set via the post-processing operation setting device.

Abstract: The invention relates to a registration system for sheet fed processing machines that reduces or eliminates the need to calibrate the register and/or timing dials of such a machine. The system uses known measurements and the elapsed time between electrically generated pulses to determine the relative position of processing cylinders in the machine relative the timing of a feed mechanism. The relative positions are displayed in real-time and can be adjusted by an operator. The machine need not be ‘in time’ to properly register the machine.