Printing control system having means to correct flight time

A printing control system in which a printing head is moved by a pulling member coupled to a power source, and a printing command signal generated in response to a signal synchronized with motion of the power source is applied to the printing head, which comprises:

• means for detecting moving speed of the printing head;
• and
• means for correcting timing at which the printing command signal is generated, in association with both expansion and contraction rate of the pulling member and flight time at the detected moving speed,
• said timing correcting means further comprising:
• a) means for generating a time correction value including an addition of a first correction time for correcting the generation timing of the printing command signal with respect to the expansion and contraction rate of the pulling member and a second correction time for correcting the generation timing of the printing command signal with respect to the flight time, both according to the detected moving speed, in accordance with a predetermined relationship between the first correction time and the moving speed of the printing head and another predetermined relationship between the second correction time and the moving speed of the printing head;
• b) means for controlling time intervals from when the synchronizing signal is received to when the printing command signal is generated, on the basis of the generated time correction value, and
• c) means for discriminating whether the printing head is being accelerated or decelerated;
• and wherein said correction value generating means generates different values as the correction value according to acceleration and deceleration discriminated by said discriminating means, even if the detected moving speed is the same.