Patent ID: 7216949
Filing Date: 2007-05-15
Classification: B41J

Abstract:
1. An ink jet printer to record an image on a recording medium by jetting ink from nozzles comprising: a vibration detection section to receive ink jetted from the nozzles and output a detection signal having an amplitude corresponding to a vibration generated when the ink lands on the vibration detection section; a sampling section to sample an amplitude value of the detection signal by a predetermined sampling clock signal; a storing section to store an amplitude value data of the detection signal sampled by the sampling section; a judging section to judge a jet failure of one of the nozzles based on the amplitude value data of the detection signal stored in the storing section; and a control section to control to jet the ink continuously a plurality of times with a jet drive cycle which is set by multiplying a standard drive waveform time of an ink jet signal from the nozzles by an odd number which is not less than five when detecting a jet failure of one of the nozzles.