Data processor

There is disclosed a data processor for processing, recording, and/or displaying data obtained from objects under investigation. The processor is divided into units in the form of blocks in terms of function. The units are detachable and connected to each other by communication cables. Therefore, the functions can be extended and shrunk with an increased number of degrees of freedom. The processor further includes a carriage driver means using a screw to improve the character print quality and the character print resolution. Furthermore, the number of components is reduced. Moreover, the processor is assembled by a reduced number of steps. The processor comprises input units and a control unit. Each input unit converts signals obtained by measurements from the plural objects into digital form. The input unit has a communication means for sending the digital signals. The control unit has plural connectors of the same standards. The input units can be attached to the connectors. The control unit has an arithmetic-and-communication means having information about positions at which the connectors are mounted. The arithmetic-and-communication means collects the signals obtained by the measurements and performs arithmetic processing. The control means further includes a storage means in which the results of the arithmetic processing are stored. The control unit processes the signals, using the signals stored in the storage means, and making recordings. The character printing portion of the control unit has a support means and a driver means for driving the carriage. The support means holds the carriage on which a recording head is carried in such a way that the carriage can move across paper. The driver means comprises a driving motor, a screw connected to the driving shaft of the motor, and a nut member mounted on the carriage. The nut member meshes with the screw.