Liquid discharge device
A liquid discharge device includes a case receiving a cartridge having a first liquid chamber, a tank having a second liquid chamber, a head, a liquid level sensor, an interface, an alarm and a controller configured to: when the cartridge is installed in the case, read a liquid amount Vc stored in the first liquid chamber from a cartridge memory through the interface; read a liquid amount Vs stored in the second liquid chamber from a memory; calculate a threshold based on the liquid amount Vc read from the cartridge memory and the liquid amount Vs read from the memory; update a count value with a value equivalent to an amount of liquid instructed to be discharged by a discharge instruction; and operate the alarm when the updated count value reaches the threshold.
1. A liquid discharge device comprising:
an installation case configured to receive a cartridge, the cartridge comprising a first liquid chamber storing a liquid;
a tank comprising a second liquid chamber;
a flow path, one side of the flow path communicated with the second liquid chamber, and the other side of the flow path communicated with the first liquid chamber of the cartridge installed in the installation case;
a head communicated with the second liquid chamber;
a liquid level sensor;
an interface;
a memory;
an alarm; and
a controller configured to:
receive, from the liquid level sensor, a first signal indicating that a position of a liquid level in the second liquid chamber is equal to or higher than a predetermined position;
receive, from the liquid level sensor, a second signal indicating that the position of the liquid level in the second liquid chamber is lower than the predetermined position;
determine whether the cartridge is installed in the installation case;
based on determining that the cartridge is installed in the installation case, read a liquid amount Vc of a liquid stored in the first liquid chamber from a cartridge memory of the cartridge through the interface;
read a liquid amount Vs of a liquid stored in the second liquid chamber from the memory;
based on at least the liquid amount Vc read from the cartridge memory and the liquid amount Vs read from the memory, calculate a threshold, the threshold being equivalent to the position of the liquid level in the second liquid chamber which is lower than the predetermined position;
receive a discharge instruction to discharge a liquid through the head;
update a count value with a value equivalent to an amount of the liquid instructed to be discharged by the received discharge instruction; and
operate the alarm in a case the updated count value reaches the threshold.
2. The liquid discharge device according to claim 1 , wherein the controller is configured to:
based on determining that the cartridge is installed in the installation case, read information indicating an initial liquid amount Vc0 of a liquid stored initially in the first liquid chamber, from the cartridge memory;
based on the read information indicating the initial liquid amount Vc0, determine a correction value; and
calculate the threshold by adding the read liquid amount Vc, the read liquid amount Vs, and the determined correction value to each other.
3. The liquid discharge device according to claim 2 , wherein the controller is configured to calculate the correction value by multiplying a sum of the initial liquid amount Vc0 indicated by the read information and the read liquid amount Vs by a coefficient.
4. The liquid discharge device according to claim 3 , wherein the controller is configured to calculate the correction value by further adding a fixed value to the value obtained by multiplying the sum of the initial liquid amount Vc0 indicated by the read information and the read liquid amount Vs by the coefficient.
5. The liquid discharge device according to claim 1 , wherein the controller is configured to:
based on determining that the cartridge is installed in the installation case, read identification information stored in the cartridge memory through the interface from the cartridge memory of the cartridge installed in the installation case;
store the read identification information in the memory;
determine whether the cartridge is installed in the installation case at a predetermined time point from when the memory stores the identification information;
based on determining that the cartridge is installed in the installation case, read identification information stored in the cartridge memory through the interface from the cartridge memory of the cartridge installed in the installation case at the predetermined time point;
compare the identification information read from the cartridge memory with the identification information read from the memory; and
in a case the compared identification information is different and the liquid amount Vc read from the cartridge memory is not zero, cancel the operation of the alarm.
6. The liquid discharge device according to claim 5 , wherein the controller is configured to:
determine a total liquid amount which is a sum of the liquid amount Vc read from the cartridge memory and the liquid amount Vs read from the memory;
determine the liquid amount Vs of the second liquid chamber, from the determined total liquid amount when the liquid level of the first liquid chamber and the liquid level of the second liquid chamber are in equilibrium; and
in a case the determined liquid amount Vs is larger than a liquid amount when the liquid level in the second liquid chamber is at the predetermined position, cancel the operation of the alarm.
7. The liquid discharge device according to claim 1 , wherein the controller is configured to:
based on determining that the cartridge is installed in the installation case, access to the cartridge memory through the interface; and
in a case the access to the cartridge memory through the interface is impossible, update the liquid amount Vs stored in the memory to a fixed value.
8. The liquid discharge device according to claim 1 , wherein the controller is configured to prohibit the discharge of the liquid through the head when the updated count value reaches the threshold.
9. A liquid discharge device comprising:
an installation case configured to receive a cartridge, the cartridge comprising a first liquid chamber storing a liquid;
a tank comprising a second liquid chamber;
a flow path, one side of the flow path communicated with the second liquid chamber, and the other side of the flow path communicated with the first liquid chamber of the cartridge installed in the installation case;
a head communicated with the second liquid chamber;
a liquid level sensor;
an interface;
a memory; and
a controller configured to:
receive, from the liquid level sensor, a first signal indicating that a position of a liquid level in the second liquid chamber is equal to or higher than a predetermined position;
receive, from the liquid level sensor, a second signal indicating that the position of the liquid level in the second liquid chamber is lower than the predetermined position;
read a liquid amount Vc of a liquid stored in the first liquid chamber from a cartridge memory of the cartridge through the interface;
read a liquid amount Vs of a liquid stored in the second liquid chamber from the memory;
based on at least the liquid amount Vc read from the cartridge memory and the liquid amount Vs read from the memory, calculate a threshold, the threshold being equivalent to the position of the liquid level in the second liquid chamber which is lower than the predetermined position;
receive a discharge instruction to discharge a liquid through the head;
update a count value with a value equivalent to an amount of the liquid instructed to be discharged by the received discharge instruction; and
prohibit the discharge of the liquid through the head in a case the updated count value reaches the threshold.