Jetting head control device, jetting head control method, program, and liquid jet system

1 . A jetting head control device that supplies a drive voltage to a jetting head provided with a plurality of nozzles to control the jetting head, the jetting head control device comprising:

one or more processors; and

one or more memories in which a program to be executed by the one or more processors is stored,

wherein the one or more processors execute the program to:

supply a non-printing oscillation voltage to which a non-printing oscillation waveform for causing liquid to oscillate without jetting the liquid is applied, to the nozzle in a non-printing period in which a printing operation is not executed; and

supply a printing oscillation voltage to which a printing oscillation waveform for causing the liquid to oscillate without jetting the liquid is applied, to a non-jetting nozzle that does not jet the liquid in a printing period in which the printing operation is executed,

the non-printing oscillation waveform includes a plurality of pulse waveforms,

in a case in which a natural period of the jetting head is denoted by T C , a pulse width T W is represented by (3/4)×T C <T W <(5/4)×T C ,

in a case in which Nis an integer of 1 or more and a pulse interval of the plurality of pulse waveforms is denoted by T INT , the pulse interval T INT is represented by T INT =(N+1/2)×(T C /2) using the natural period T C , and the pulse interval is shifted from the natural period T C of the jetting head, and

an indicator of a total amount of oscillation in which a total amount of oscillation, which is an indicator of oscillation of an ink, is larger than a total amount of oscillation in the printing oscillation waveform is applied.

2 . The jetting head control device according to claim 1 ,

wherein the number of pulses per unit time in the non-printing oscillation waveform is applied as the indicator of the total amount of oscillation, and

in the non-printing oscillation waveform, the number of pulses per unit time exceeding the number of pulses per unit time in the printing oscillation waveform is applied.

3 . The jetting head control device according to claim 1 ,

wherein a potential difference with a reference potential in the drive voltage is applied as the indicator of the total amount of oscillation, and

in the non-printing oscillation voltage, a potential difference with the reference potential, which exceeds a potential difference with the reference potential in the printing oscillation voltage, is applied.

4 . The jetting head control device according to claim 1 ,

wherein, in the printing oscillation waveform, a pulse width that is the same as a pulse width of the non-printing oscillation waveform is applied.

5 . The jetting head control device according to claim 1 ,

wherein the one or more processors supply a jetting voltage at which a jetting waveform for jetting the liquid from the nozzle is applied, to the nozzle that jets the liquid in the printing period, and

in the printing oscillation waveform, a part of the jetting waveform is applied.

6 . The jetting head control device according to claim 5 ,

wherein the jetting waveform includes a reverberation suppression waveform for suppressing liquid oscillation in a case in which the liquid is jetted, and

in the printing oscillation waveform, the reverberation suppression waveform in the jetting waveform is applied.

7 . The jetting head control device according to claim 6 ,

wherein the non-printing oscillation waveform has a pulse width that is the same as a pulse width of the reverberation suppression waveform.

8 . A jetting head control method for supplying a drive voltage to a jetting head provided with a plurality of nozzles to control the jetting head, the jetting head control method comprising:

supplying a non-printing oscillation voltage to which a non-printing oscillation waveform for causing liquid to oscillate without jetting the liquid is applied, to the nozzle in a non-printing period in which a printing operation is not executed; and

supplying a printing oscillation voltage to which a printing oscillation waveform for causing the liquid to oscillate without jetting the liquid is applied, to a non-jetting nozzle that does not jet the liquid in a printing period in which the printing operation is executed,

wherein, the non-printing oscillation waveform includes a plurality of pulse waveforms,

in a case in which a natural period of the jetting head is denoted by T C , a pulse width T W is represented by (3/4)×T C <T W <(5/4)×T C ,

in a case in which N is an integer of 1 or more and a pulse interval of the plurality of pulse waveforms is denoted by T INT , the pulse interval T INT is represented by T INT =(N+1/2)×(T C /2) using the natural period T C , and the pulse interval is shifted from the natural period T C of the jetting head, and

an indicator of a total amount of oscillation in which a total amount of oscillation, which is an indicator of oscillation of an ink, is larger than a total amount of oscillation in the printing oscillation waveform is applied.

9 . A non-transitory, computer-readable tangible recording medium on which a program for causing, when read by a computer, the computer to execute the jetting head control method according to claim 8 is recorded.

10 . A liquid jet system comprising:

a jetting head provided with a plurality of nozzles; and

a jetting head control device that supplies a drive voltage to the jetting head to control the jetting head,

wherein the jetting head control device includes:

one or more processors; and

one or more memories in which a program to be executed by the one or more processors is stored,

the one or more processors execute the program to:

supply a non-printing oscillation voltage to which a non-printing oscillation waveform for causing liquid to oscillate without jetting the liquid is applied, to the nozzle in a non-printing period in which a printing operation is not executed; and

supply a printing oscillation voltage to which a printing oscillation waveform for causing the liquid to oscillate without jetting the liquid is applied, to a non-jetting nozzle that does not jet the liquid in a printing period in which the printing operation is executed,

the non-printing oscillation waveform includes a plurality of pulse waveforms,

in a case in which a natural period of the jetting head is denoted by T C , a pulse width T W is represented by (3/4)×T C <T W <(5/4)×T C ,

in a case in which N is an integer of 1 or more and a pulse interval of the plurality of pulse waveforms is denoted by T INT , the pulse interval T INT is represented by T INT =(N+1/2)×(T C /2) using the natural period T C , and the pulse interval is shifted from the natural period T C of the jetting head, and

an indicator of a total amount of oscillation in which a total amount of oscillation, which is an indicator of oscillation of an ink, is larger than a total amount of oscillation in the printing oscillation waveform is applied.

11 . The liquid jet system according to claim 10 ,

wherein the jetting head includes a circulation flow channel through which the liquid circulates from each of the plurality of nozzles to an internal flow channel.