Abstract: User concerns caused by a time lag between issuing a command for a specific operation and the start of the specific operation are reduced without reducing the accuracy of ejection problem detection by a nozzle check process. The nozzle check execution unit of an inkjet printer monitors if a cut button is pressed while a nozzle check process is in progress, interrupts the nozzle check process if the button is pressed, and after the cutting process ends, resumes the nozzle check process and checks the nozzles that have not been tested for ejection problems.

Abstract: User concerns caused by a time lag between issuing a command for a specific operation and the start of the specific operation are reduced without reducing the accuracy of ejection problem detection by a nozzle check process. The nozzle check execution unit of an inkjet printer monitors if a cut button is pressed while a nozzle check process is in progress, interrupts the nozzle check process if the button is pressed, and after the cutting process ends, resumes the nozzle check process and checks the nozzles that have not been tested for ejection problems.

Abstract: User concerns caused by a time lag between issuing a command for a specific operation and the start of the specific operation are reduced without reducing the accuracy of ejection problem detection by a nozzle check process. The nozzle check execution unit of an inkjet printer monitors if a cut button is pressed while a nozzle check process is in progress, interrupts the nozzle check process if the button is pressed, and after the cutting process ends, resumes the nozzle check process and checks the nozzles that have not been tested for ejection problems.

Abstract: An electronic device that supports multiple command systems embodies a function for switching from one to another of the multiple command systems regardless of the specifications of the command system being used. A hybrid device 10 that operates based on commands sent from a host computer 200 sets a specific transition condition for changing to another command system after the last command system change corresponding to a switching command sent from the host computer 200. When the set transition condition is met, the computer returns to the command system used before the command system was last changed or changes to another command system.

Abstract: A printer enables setting roll paper in a center-referenced position based on received paper width information, and printing correctly to the printing area of the paper set to the centered position. When the paper width of the paper used for printing is not contained in the received data, the printer sets the paper width of the paper for printing to the maximum paper width. The distance L from the edge of the transportation path to the start printing position of the inkjet head is also set to L=Lm (where Lm is the size of the margin on the paper). When the paper width is contained in the received data, the position where the paper is set is the center reference, and the received paper width is set as the paper width of the paper used for printing.

Abstract: A hybrid device that can perform plural operations can switch quickly between operating modes. The hybrid device can perform plural processes on a processed medium based on commands sent from a host computer 200. If a scan command instructing a optical reader 110, which is another process unit, to scan the processed medium is received while executing a print command for a printing process on the medium, the control unit 70 sets the scan command to a command execution standby state, finishes executing the print command, and after the print command is completed executes the scan command queued in the command execution standby state.

Abstract: A printer enables setting roll paper in a center-referenced position based on received paper width information, and printing correctly to the printing area of the paper set to the centered position. When the paper width of the paper used for printing is not contained in the received data, the printer sets the paper width of the paper for printing to the maximum paper width. The distance L from the edge of the transportation path to the start printing position of the inkjet head also set to L=Lm (where Lm is the size of the margin on the paper). When the paper width is contained in the received data, the position where the paper is set is the center reference, and the received paper width is set as the paper width of the paper used for printing.

Abstract: A paper transportation control method for an apparatus enables conveying paper with appropriate tension on the paper by appropriately controlling a paper delivery operation of a delivery roller. When paper is conveyed by a paper feed roller pair of a roll paper printer, and tension on the paper is detected to exceed an upper tension limit based on displacement of a damping mechanism (a first time), a paper delivery operation of a delivery roller pair starts at a second time after a start operation delay time corresponding to a feed rate passes after the first time. When the tension returns to or below the upper tension limit, the paper delivery operation stops at a third time after a stop operation delay time similarly corresponding to the feed rate passes.

Abstract: User concerns caused by a time lag between issuing a command for a specific operation and the start of the specific operation are reduced without reducing the accuracy of ejection problem detection by a nozzle check process. The nozzle check execution unit of an inkjet printer monitors if a cut button is pressed while a nozzle check process is in progress, interrupts the nozzle check process if the button is pressed, and after the cutting process ends, resumes the nozzle check process and checks the nozzles that have not been tested for ejection problems.

Abstract: A printer enables setting roll paper in a center-referenced position based on received paper width information, and printing correctly to the printing area of the paper set to the centered position. When the paper width of the paper used for printing is not contained in the received data, the printer sets the paper width of the paper for printing to the maximum paper width. The distance L from the edge of the transportation path to the start printing position of the inkjet head is also set to L=Lm (where Lm is the size of the margin on the paper). When the paper width is contained in the received data, the position where the paper is set is the center reference, and the received paper width is set as the paper width of the paper used for printing.

Abstract: An inkjet printer prevents the paper from lifting away from the platen when the suction action of the platen is stopped, and thereby prevents paper jams and other printing problems. The printer 1 conveys the printing paper 12a while holding the paper 12a to the surface of the platen 19 by a suction mechanism 50. After the automatic paper cutting operation is completed, the leading end part 12b of the printing paper 12a is retracted from the cutting position B to the printing start position A on the platen 19, and the printer 1 waits for the next print job with the printing paper 12a held against the platen 19. When a power conservation mode or power off mode is entered, the control unit 61 of the printer 1 advances the leading end part 12b of the printing paper 12a from the printing start position A to the cutting position B so that the paper is held by the downstream-side paper feed roller 34 and pressure roller 35, and then stops the power supply to the suction mechanism 50 of the platen 19.

Abstract: A method of printing an indication of defective printing can print a defective printing mark indicating that printing was not completed normally on a printout containing unprinted or missing dots. When printing one page of print data on recording paper is completed but before a paper discharge command indicating a page break (step ST3) is executed, the operation printing the one page of print data is interrupted and whether or not ink droplets are being discharged normally from the ink nozzles of the inkjet head is detected. If the ink droplets are not being discharged normally, the recording paper is conveyed in reverse direction and print data for the defective printing mark is printed on the recording paper as part of the interrupt process. Therefore, if the recording paper contains unprinted (missing) dots, a defective printing mark is printed on the recording paper and printing the one page of print data then ends.

Abstract: An electronic device that supports multiple command systems embodies a function for switching from one to another of the multiple command systems regardless of the specifications of the command system being used. A hybrid device 10 that operates based on commands sent from a host computer 200 sets a specific transition condition for changing to another command system after the last command system change corresponding to a switching command sent from the host computer 200. When the set transition condition is met, the computer returns to the command system used before the command system was last changed or changes to another command system.

Abstract: A hybrid device that can perform plural operations can switch quickly between operating modes. The hybrid device can perform plural processes on a processed medium based on commands sent from a host computer 200. If a scan command instructing a optical reader 110, which is another process unit, to scan the processed medium is received while executing a print command for a printing process on the medium, the control unit 70 sets the scan command to a command execution standby state, finishes executing the print command, and after the print command is completed executes the scan command queued in the command execution standby state.

Abstract: A recording control device includes a head driving circuit, a temperature detector, and a controller. The head driving circuit includes a power supply that supplies a driving current to a plurality of driving coils used for driving a plurality of recording wires provided in a recording head. An induced current flows through a circuit which is connected to the plurality of driving coils when the driving current to the driving coils stops. The temperature detector detects a temperature of heat generated in the circuit due to the induced current, and the controller controls an operation of the recording head based on the temperature detected by the temperature detector.

Abstract: A recording control device includes a head driving circuit, a temperature detector, and a controller. The head driving circuit includes a power supply that supplies a driving current to a plurality of driving coils used for driving a plurality of recording wires provided in a recording head. An induced current flows through a circuit which is connected to the plurality of driving coils when the driving current to the driving coils stops. The temperature detector detects a temperature of heat generated in the circuit due to the induced current, and the controller controls an operation of the recording head based on the temperature detected by the temperature detector.

Abstract: A recording control device includes a head driving circuit, a temperature detector, and a controller. The head driving circuit includes a power supply that supplies a driving current to a plurality of driving coils used for driving a plurality of recording wires provided in a recording head. An induced current flows through a circuit which is connected to the plurality of driving coils when the driving current to the driving coils stops. The temperature detector detects a temperature of heat generated in the circuit due to the induced current, and the controller controls an operation of the recording head based on the temperature detected by the temperature detector.

Abstract: A printer enables setting roll paper in a center-referenced position based on received paper width information, and printing correctly to the printing area of the paper set to the centered position. When the paper width of the paper 12a used for printing is not contained in the received data, the printer 1 sets the paper width of the paper 12a for printing to the maximum paper width. The distance L from the edge of the transportation path A to the start printing position of the inkjet head 14 is also set to L=Lm (where Lm is the size of the margin on the paper). When the paper width is contained in the received data, the position where the paper is set is the center reference, and the received paper width is set as the paper width of the paper used for printing.

Abstract: A main task (44) pre-reads received data from a receiving buffer (22) before a read-out task (42) actually reads out the received data from the receiving buffer (22). If the main task (44) finds out a cancel command by the pre-reading, it transmits to a print management task (46) an instruction for canceling a print request data heretofore transmitted to the print management task 46. As a result, the print is cancelled. Thus needless printing can be minimized.

Abstract: A paper transportation control method for an apparatus enables conveying paper with appropriate tension on the paper by appropriately controlling the paper delivery operation of a delivery roller. When paper is conveyed by the paper feed roller pair 34 of a roll paper printer 1, and the tension on the paper 8a is detected to exceed an upper tension limit based on the displacement of a damping mechanism 32 (time t2), the paper delivery operation of a delivery roller pair 33 starts at a time t3 after a start operation delay time DLS (first delay time) corresponding to the feed rate V(34) passes after time t2. When the tension returns to or below the upper tension limit, the paper delivery operation stops at a time t5 after a stop operation delay time DLE (second delay time) similarly corresponding to the feed rate V(34) passes. Tension fluctuation (change in the load on the paper feed roller) can be controlled without causing chattering or fluttering in paper delivery operation control.