Recording device and control method

A recording device including a nozzle array including a plurality of nozzles to discharge ink droplets, comprising:

• a detection unit including a pair of a light-emitting unit and a light-receiving unit and converting scattering light generated by intersection between light emitted from the light-emitting unit and an ink droplet discharged from each of the nozzles of the nozzle array, into an electric signal in the light-receiving unit;
• a first signal generation unit amplifying the electric signal converted by the light-receiving unit to generate a first electric signal;
• a second signal generation unit generating a second electric signal representing change of the first electric signal;
• a determination unit determining presence or absence of an ink droplet based on the second electric signal;
• a relation information generation unit generating relation information in which an amplification value corresponding to the first electric signal generated when an arbitrary nozzle of the nozzle array discharges an ink droplet and the arbitrary nozzle are associated with each other;
• and
• a control unit performing control to amplify the electric signal at an amplification value according to a corresponding nozzle based on the relation information when ink droplets are sequentially discharged from the respective nozzles of the nozzle array.