PRINTER

摘要

PURPOSE:To perform excellent printing even though a printing pattern is changed by controlling a voltage applied to a coil by a controlling means which outputs a control driving signal. CONSTITUTION:A printing data B is inputted into a maximum value circuits 11 in synchronization with clock signals T. The number of the clock signals during the period the printing data B becomes continuously high from the rise of a starting signal A to the rise of a striking signal. A maximum value M is judged and stored in the circuit 11. A function circuit 12 determines a voltage control signal F corresponding to the maximum value 7 based on the function defined in the inside. A voltage control circuit 13 converts a power source voltage E to a driving voltage K which is proportional to a voltage control signal F. A pulse generating circuit 14 generates a pulse W having a specified pulse width in synchronization with the rise of the striking signal. A driving circuit 15 applies the driving voltage K to the coil 4, whose driving is specified, for the period of the pulse width of the pulse W in synchronization with clock signal T and drives a printing hammer 6.