Abstract: A magnetic data reading apparatus and magnetic data reading method are provided. The magnetic data reading apparatus includes a magnetic head apparatus (211) and a controller (20). The magnetic head apparatus (211) includes a magnetic core (10) and a magnet exciting coil (11) wound around the magnetic core (10). The controller is configured to control the magnet exciting coil (11) to be energized for a first preset time (T1) and read first magnetic data of a bill to be read when energizing time reaches the first preset time (T1), and is further configured to control the magnet exciting coil (11) to be de-energized for a second preset time (T2) and read second magnetic data of the bill to be read when de-energizing time reaches the second preset time (T2).

Abstract: A print control method and device, wherein the method includes: monitoring a print system port, storing a print task at a preset memory address in the form of job file when the print task exists at the print system port; querying the memory address on schedule, determining the target job file when there is a job file storing at the memory address; querying the printer state, if the printer is idle, sending the target job file; when the printer is in a state of failure, feeding a failure state prompting information back. The solution queries the printer work state before the job file is sent, feeds the prompting information back when the printer occurs failure, detects the print process state of job files, and performs a processing for failure when a print fails. Through the solution, users can know the states of job files in time and missing or omitting of a job file is avoided.

Abstract: A device and a method for controlling a bit density of a magnetic card (2) are provided. Said control device comprises a stepper motor (1) providing power to drive the magnetic card (2) or a recording magnetic head (15), a transmission mechanism transferring power to the magnetic card (2) or the recording magnetic head (15), a CPU (10) sending magnetic recording information, a track data encoder (13) receiving a magnetic writing pulse signal (CLK1) and generating magnetic writing data in synchronization with the magnetic writing pulse signal (CLK1), and a magnetic head driving circuit (14) outputting a magnetic writing control signal based on the magnetic writing data. The frequency of the magnetic writing pulse signal (CLK1) and the frequency of a driving pulse signal (CLK0) of the stepper motor are in a linear relationship. Said control method is a method for controlling a bit density.