MOVING DEVICE OF CARRIAGE WITH PRINTING HEAD Russian patent published in 1998 - IPC

FIELD: printing devices, applicable in similar machines using matrix, jet printing heads installed on carriage. SUBSTANCE: the device uses a central processor, whose phase switching control outputs of the stepping motor are connected to the inputs of the power keys unit, the outputs of the latter are connected to the respective phases of the stepping motor with a device controlling the carriage displacement, having four keys and a Schmitt trigger; the central processor has additional two outputs and one input; the first additional output of the central processor is connected to the control input of the first key, and its output is connected to the combined phase circuit of the stepping motor, the second additional output of the central processor is connected to the control inputs of the second and third keys, the output of the second key is connected to the input of the fourth key, and the output of the fourth key is connected to the input of the Schmitt trigger, whose output is connected to the additional input of the central processor; the supply input of the fourth key is connected to the first phase of the stepping motor, and the input of the third key-to the third phase of the stepping motor. EFFECT: improved design. 1 dwg