Head system, liquid discharge device, and method of discharging liquid

A method of discharging liquid of a head system, the head system comprising:

• a main controller;
• a plurality of head units including nozzles;
• and
• a plurality of sub-controllers respectively connected to at least one of the plurality of head units, each of the sub-controllers being serially connected via a wiring,
• the wiring comprising:
• a first communication path configured to transmit an image signal;
• and
• a second communication path configured to transmit a discharge timepoint signal indicating a discharge timepoint when liquid is to be discharged from the nozzles, the second communication path differing from the first communication path,
• the method of discharging liquid comprising:
• causing the main controller to transmit the image signal to each of the sub-controllers through the first communication path;
• causing one of the sub-controllers to transmit the discharge timepoint signal to others of the sub-controllers through the second communication path;
• and
• causing each of the sub-controllers to control one of the head units, to which each of the sub-controllers have been connected, to discharge liquid corresponding to an image indicated by the image signal that has been received through the first communication path from the nozzles of the one of the head units, at a discharge timepoint indicated by the discharge timepoint signal that has been received through the second communication path.

A method of discharging liquid of a head system, the head system comprising:

• a main controller;
• a plurality of head units having nozzles;
• and
• a plurality of sub-controllers respectively connected to at least one of the plurality of head units, each of the sub-controllers being serially connected via a wiring,
• the wiring comprising:
• a first wiring sequentially connecting the main controller and each of the sub-controllers, the first wiring being configured to transmit an image signal;
• and
• a second wiring configured to transmit a discharge timepoint signal indicating a discharge timepoint when liquid is to be discharged from the nozzles, the second wiring sequentially connecting each of the sub-controllers and differing from the first wiring,
• the method of discharging liquid comprising:
• causing the main controller to transmit the image signal to each of the sub-controllers through the first wiring;
• causing one of the sub-controllers to transmit the discharge timepoint signal to others of the sub-controllers through the second wiring;
• and
• causing each of the sub-controllers to control one of the head units, to which each of the sub-controllers have been connected, to discharge liquid corresponding to an image indicated by the image signal that has been received through the first wiring from the nozzles of the one of the head units at a discharge timepoint indicated by the discharge timepoint signal that has been received through the second wiring.