Image formation apparatus, image formation system, and output control method

An image formation system comprising a post processing apparatus for performing a post process to a sheet, and an image formation apparatus connected to said post processing apparatus,

• said image formation apparatus including
• a power source for outputting an equal voltage to a first load and a second load in parallel, said first load being provided in said image formation apparatus and being involved in image formation, said second load being provided in said post processing apparatus and being involved in said post process,
• a power source controller for increasing the output voltage of said power source during an operation of said second load so that a voltage drop supplied to the second load is reduced, and
• a load controller for controlling an operation of said first load such that an output of said first load falls within a predetermined range during the operation of said second load when the output voltage of said power source is increased by the power source controller and when the increase of output voltage of said power source causes a temporary increase in the voltage supplied to the first load and the second load,
• said post processing apparatus transmitting, to said image formation apparatus, information indicating a change in said voltage supplied to said second load during the operation of said second load,
• said image formation apparatus receiving said information indicating the change, from said post processing apparatus,
• said power source controller determining, based on said information indicating the change, a degree of increase of the output voltage of said power source.

An output control method in an image formation apparatus connectable to a post processing apparatus for performing a post process to a sheet, the output control method comprising the steps of:

• a power source of said image formation apparatus outputting an equal voltage to a first load and a second load in parallel, said first load being provided in said image formation apparatus and being involved in image formation, said second load being provided in said post processing apparatus and being involved in said post process;
• a controller of said image formation apparatus increasing the output voltage of said power source during an operation of said second load so that a voltage drop supplied to the second load is reduced;
• and
• said controller controlling an operation of said first load such that an output of said first load falls within a predetermined range during the operation of said second load when the output voltage of said power source is increased by the power source controller and when the increase of output voltage of said power source causes a temporary increase in the voltage supplied to the first load and the second load.