PRINTING APPARATUS

PURPOSE:To make it possible to keep high printing quality, by calculating a load amount from input data to be printed prior to driving a printing head while judging whether the calculated value exceeds the tolerance limit capable of securing printing quality and performing the split driving of a printing head when said value exceeds the tolerance limit. CONSTITUTION:Printing data is inputted to a microcomputer 10 from an input port P1 and the number of informations for driving a reading printing head are added to the load counter in the computer 10 to be stored in a printing register 20. This operation is repeated until the printing register 20 is filled. When the offering from a printing timing generator 50 is generated and the value of the load counter is larger than the load limit value stored in ROM, only a strobe 1 is outputted to turn a half number of AND gates 30 ON and the other half number of the gates 30 are turned ON by the next printing timing offering to divide load in two. Because a driving load amount is detected from input printing data to control a load driving state, higher quality printing is enabled by a reduced number of hardwares.