PURPOSE: To prevent slippage in the recording, by varying the magnitude of a recording information signal in inverse proportion to changes in the revolutions of a drum having a recording paper set thereon to make a recording accurately at a determined position of the recording paper.
CONSTITUTION: A square wave 41 corresponding to the revolutions of a drum 7 outputted from an encoder 19 is inputted into a frequency-voltage converter 20 and converted to a voltage 24 to be outputted. The voltage 24 is inputted into a reference voltage conversion circuit 21, where it is shifted to the negative side with respect to the reference voltage 0V and a voltage 25 is outputted. Therefore, the voltage 25 is converted and outputted large when the revolutions of the drum 7 decreases while small when they increase. A recording information signal 26 given when the revolutions of the drum 7 increase is multiplied by the voltage 25 of a voltage value v2 small in the absolute value and the signal turned to a small voltage value is produced as output 27. Then, ink particles 28 are charged at the level corresponding to the size of the voltage value and thus, the ink particles 28 with a small deflection angle enables the recording on a recording paper 8 without slippage according to the recording information signal 26.
MATSUDA YASUMASA
YAMADA TAKEHIRO
HITACHI KOKI KK
HITACHI SEIKO KK