Patent ID: 8807675

Claim:
A liquid droplet jetting apparatus which jets a liquid droplet of a liquid, comprising: a liquid droplet jetting head which has a nozzle formed therein and which jets the liquid droplet of the liquid from the nozzle; a liquid kind detecting section which detects whether the liquid, used in the liquid droplet jetting head, is a first liquid having a conductivity of not less than a predetermined value or a second liquid having a conductivity of less than the predetermined value; a discharge mechanism which discharges the liquid inside the liquid droplet jetting head from the liquid droplet jetting head; a waste liquid recovery device which recovers the liquid discharged by the discharge mechanism, the waste liquid recovery device including: a waste liquid case; an absorbing body accommodated in the waste liquid case; and a waste liquid detection mechanism which measures an electric current value in the absorbing body at a predetermined full-liquid detection position when a predetermined voltage is applied, and which detects whether or not the liquid arrives at the full-liquid detection position of the absorbing body based on the measured electric current value; a waste liquid absorb amount estimating section which estimates an amount of the waste liquid, absorbed in the absorbing body, based on a value of an estimated amount of the waste liquid generated by one discharge operation of the discharge mechanism and the number of times of the discharge operations performed by the discharge mechanism; and a full liquid judging section which judges whether or not the absorbing body is in a full liquid state; wherein the full liquid judging section judges whether or not the absorbing body is in the full liquid state based on a detection result of the waste liquid detection mechanism, under a condition that the liquid kind detecting section detects that the liquid is the first liquid having the conductivity of not less than the predetermined value; and wherein the full liquid judging section judges whether or not the absorbing body is in the full liquid state based on the amount of the waste liquid estimated by the waste liquid absorb amount estimating section, under a condition that the liquid kind detecting section detects that the liquid is the second liquid having the conductivity of less than the predetermined value.