PRINT POSITION CONTROLLING SYSTEM

摘要

PURPOSE:To provide a print position control system enabling a printer to print images of high quality at a high speed without being influenced by errors of position detection by such an arrangement wherein errors of position detection attributable to the hunting etc. of a print head which makes reciprocatory movement, at the time of detection of moving positions are prevented by the use of print indexes which are provided at the same density as that of dots which are units of image elements to be printed and position indexes which are provided at an interval equivalent to a value obtained by multiplying the print indexes with a whole number. CONSTITUTION:Together with a position index corresponding to each print dot, position indexes 3b shall be provided as follows. The relation between the interval l of position indexes 3b and the interval of approaching distance l'2 shall be such that the interval of the position indexes 3b shall be made narrower than the auxiliary running distance l'2 at all times, and control of print position is accomplished by providing position indexes so that a carriage is caused to stop or return in the vicinity of the central part between a position index and an adjoining position index.