Liquid droplet circulation control apparatus, liquid droplet ejection apparatus, and computer readable storage medium

A liquid droplet ejection apparatus comprising:

• a liquid droplet ejection controller that comprises a liquid droplet ejector comprising nozzles for ejecting liquid droplets, a supply side pipe path section configured by a supply side path for supplying a liquid, which is a collection of the liquid droplets stored in a storage tank, to the liquid droplet ejector by driving of a supply side pressure generator, and a return side pipe path section for returning to the storage tank the liquid supplied to the liquid droplet ejector by driving of a return side pressure generator, the liquid droplet ejection controller controlling ejection of the liquid droplets from the nozzles of the liquid droplet ejector based on an input signal;
• a first circulation controller that sets a first circulation mode in which the liquid is circulated with pressure control by driving the supply side pressure generator and the return side pressure generator that are disposed on either side of the liquid droplet ejector, while maintaining a negative pressure for a back pressure of the nozzles;
• a second circulation controller that sets a second circulation mode in which the liquid is circulated with flow rate control by driving the supply side pressure generator and/or the return side pressure generator, such that a supply side pipe path section and a return side pipe path section is communicated so that the liquid is not supplied to the liquid droplet ejector or is made to bypass at least the liquid droplet ejector;
• a selector that selects one of the first circulation mode and the second circulation mode;
• and
• a setting unit that sets a circulation path of the liquid based on the circulation mode selected by the selector,
• wherein the second circulation controller selects and sets a circulation path that is one of:
• the first circulation path that includes the supply side pipe path and the return side pipe path, and does not include the liquid droplet ejector;
• the second circulation path that includes the supply side pipe path alone;
• or
• the third circulation path that includes the return side pipe path alone.

A computer readable storage medium stored with a program for executing liquid droplet circulation control on a computer, the liquid droplet circulation control comprising:

• setting a first circulation mode in which liquid is circulated with pressure control by driving a supply side pressure generator and a return side pressure generator that are disposed on either side of a liquid droplet ejector comprising nozzles for ejecting liquid droplets, a negative pressure for a back pressure of the nozzles being maintained during the circulation of the liquid, the supply side pressure generator supplying a liquid, which is a collection of the liquid droplets, to the liquid droplet ejector and the return side pressure generator returning the liquid from the liquid droplet ejector;
• setting a second circulation mode in which the liquid is circulated with flow rate control by driving the supply side pressure generator and/or the return side pressure generator, so that the liquid is not supplied to the liquid droplet ejector or is made to bypass at least the liquid droplet ejector;
• selecting one of the first circulation mode and the second circulation mode;
• and
• setting a circulation path of the liquid based on the circulation mode selected by the selector,
• wherein setting a second circulation mode comprises selecting and setting a circulation path that is one of:
• the first circulation path that includes a supply side pipe path for supplying the liquid to the liquid droplet ejector and a return side pipe path for returning the liquid from the liquid droplet ejector, and does not include the liquid droplet ejector;
• the second circulation path that includes the supply side pipe path alone;
• or
• the third circulation path that includes the return side pipe path alone.