Abstract: An ink jet printer comprising a print pattern storage device for storing the input print pattern data and sequentially outputting the stored data in conjunction with the relative movement of the print head, and a separate preliminary ejection data generator for causing ink droplets to be ejected from plural print elements of the print head simultaneously, the ink jet printer further comprises a selecting device for selecting the output from either the print pattern storage device or the preliminary ejection data generator, and ejecting ink droplets from the plural print elements according to the selected output.

Abstract: An ink jet printer comprising a print pattern storage device for storing the input print pattern data and sequentially outputting the stored data in conjunction with the relative movement of the print head, and a separate preliminary ejection data generator for causing ink droplets to be ejected from plural print elements of the print head simultaneously, the ink jet printer further comprises a selecting device for selecting the output from either the print pattern storage device or the preliminary ejection data generator, and ejecting ink droplets from the plural print elements according to the selected output.

Abstract: An ink jet printer comprising a print pattern storage device for storing the input print pattern data and sequentially outputting the stored data in conjunction with the relative movement of the print head, and a separate preliminary ejection data generator for causing ink droplets to be ejected from plural print elements of the print head simultaneously, the ink jet printer further comprises a selecting device for selecting the output from either the print pattern storage device or the preliminary ejection data generator, and ejecting ink droplets from the plural print elements according to the selected output.

Abstract: A method of controlling a printer using a dc motor as a drive source thereof, comprises the steps of: setting a predetermined prohibition period of time during which print and sheet-forward operations are prohibited, the predetermined prohibition period of time corresponding to a period of time until the motor arrives at a predetermined speed since the motor starts to be energized; measuring a motor power turn-off period of time until the motor starts to be energized since the motor is turned off; comparing the motor power turn-off period of time with a predetermined value; if the motor power turn-off period of time is within the predetermined value, making the prohibition period of time invalid; and if the motor power turn-off period of time exceeds the predetermined value, making the prohibition period of time valid.