Work machine and actuator calibration system

A work machine comprising:

• a hydraulic pump of a variable displacement type;
• a regulator that controls a pump flow rate, the pump flow rate being a delivery flow rate of the hydraulic pump;
• an actuator to be driven by a hydraulic fluid supplied from the hydraulic pump;
• a directional control valve that controls a flow direction of the hydraulic fluid supplied from the hydraulic pump to the actuator, the directional control valve being capable of being switched between a communication position and a neutral position, the communication position enabling supply of the hydraulic fluid from the hydraulic pump to the actuator, and the neutral position disabling the supply of the hydraulic fluid from the hydraulic pump to the actuator;
• an operation device for issuing an instruction as to an action of the actuator;
• and
• a controller that controls the regulator and the directional control valve according to an operation performed on the operation device;
• the controller storing a conversion map in which a target pump flow rate being a target value of the pump flow rate is associated with a command value of the regulator, and being configured to compute the target pump flow rate according to an operation amount of the operation device, convert the target pump flow rate to the command value in accordance with the conversion map, and output a command signal corresponding to the command value to the regulator;
• the work machine comprising:
• a calibration device that performs a calibration of the actuator;
• and
• a calibration instruction device for instructing the calibration device to perform the calibration of the actuator, wherein
• the calibration device is configured to
• instruct the controller to transition to a calibration mode when instructed to perform the calibration of the actuator,
• in the calibration mode, cause the command value to change in accordance with a predetermined pattern with the directional control valve being held in the neutral position, and
• after instructing the controller to transition to the calibration mode, generate an update-use conversion map in which a measured value of the pump flow rate is associated with the command value, and update the conversion map by using the update-use conversion map.