Media conveyance control method and printer

Technical Field

The present invention relates to out from the roller body can be suppressed and the conveying of the conveying of the strip-shaped medium on the medium of the change of the tension of the conveying medium and control method of the printer.

Background Art

Patent document 1 describes a in the paper from the roll of a long strip of the recording paper implementation of printing of the printer. The literature with the printer via the print position along the conveying path of the recording paper conveying mechanism and is used for making the reel paper rotate a medium-supplying motor. In Patent literature 1 in, the conveying mechanism and the roll paper is formed between the ring of the recording paper is bent, and is properly loaded with the detection of forming the ring the ring sensor. The conveying of the recording paper at the beginning, in order to properly form the ring driving medium supply motor to drive the drum paper rotate, thereby reducing the load of the loaded delivery mechanism.

Patent literature 1: Japanese extra Kaiping 8-133540, the

There are the following cases: if the diameter of the web and of the variation of the tension of the change takes place in the recording paper, the recording paper conveying mechanism and sliding, and the like is generated between, thus recording paper conveying speed change. In presence of changes in the conveyor speed of the situation of decrease of the printing quality, so in a printer, hope that inhibit the transport of the recording paper is acted on in a variation of the tension on the recording paper.

Here, in order to on the recording paper in the transport for the inhibiting effect a variation of the tension on the recording paper, the paper web can be taken into account between the conveying mechanism can be with the pre-configured on a variation of the tension on the recording paper and the moving member, thus in order to make the mobile member is in a setting in the mobile part of the target position of the movable area of the properly carried out in a manner of the recording paper from the paper roll out and the winding. Furthermore, as its specific structure, the recording paper can be considered periodic access of the mobile part relative to the target position of the position deviation, which are sequentially obtained and so as to reduce the position deviation of the way of the medium supply motor is subjected to feedback control to make the continuous paper rotate.

However, in the case of adopting the above-mentioned structure, there are the following risk: conveying the recording paper occurs in the paperless such errors as, electric power is supplied to the medium to increase the amount of supply of the motor, so that the medium supplied to the heating of the motor. For example, when using the terminal in printing paper roll bonded to the paper when the recording paper, the recording paper under the condition of use, recording paper to the conveying direction by the conveying mechanism is dragged D, and its terminal is web D to the conveying direction opposite to the direction of pull-out, thereby recording paper could not be transported in the locked state. In this situation, mobile part on the movable area of the recording paper becomes larger side end portion of the tension of the, therefore in order to make the movable member to return to the target position, medium supply motor in order to make the paper web drawn out recording paper to the rotation direction of the drive. And, in this case, the position deviation of the mobile part is not, therefore, accompanied by the lapse of time is supplied to the medium supply motor of greater power, thus leading to medium supply motor heating.

Furthermore, for example, when using the terminal in the printing paper roll is not bonded to the paper when the recording paper, the recording paper under the condition of use, recording paper in the vicinity of the recording paper is separated from the core terminal, D to the conveying direction in the direction opposite to the force of the pull-out recording paper to disappear. In this situation, mobile part on the movable area of the recording paper becomes smaller side end portion of the tension of the, therefore in order to make the movable member to return to the target position, medium supply motor in order to make the roll paper to the rolled recording paper the rotation direction of the drive.

And, in this case, the position deviation of the mobile part is not, therefore, accompanied by the lapse of time is supplied to the medium supply motor of greater power, thus leading to medium supply motor heating.

And, for example, midway the conveying of the recording paper, in a stuck state of the recording paper, the recording paper jam caused by the moving member is the part of the press at the end of the movable area of the same, even in this case, the position deviation of the moving member are also provided, along with the time pass therefore, will be supplied to the medium supply motor of greater power, thus leading to medium supply motor heating. Furthermore, in this case, due to the presence of the medium supply the driving of the motor on the drawing paper from the roll to the problem of recording paper.

Here, if the printer for detecting for mounting non-paper error of the recording paper, paper jam error specific sensor, such as to avoid the heating of a medium-supplying the driving of the motor. However, if carrying the above-mentioned sensor, the manufacturing cost of the device will correspondingly increase.

Content of the invention

The subject of this invention is provided in view of such points can be extracted from the medium of the roller of the conveying error detection without carrying the error detection of a dedicated sensor for conveying control method and the medium of the printer.

In order to solve the above-mentioned subject, the medium of this invention used for transport control method to control the conveying device for the medium, the medium conveying device is provided with drawn out from the roller body of the long strip-shaped medium conveying mechanism, used for making the above-mentioned roller and rotating a medium-supplying motor, the medium conveyance control method is characterized in that, in the above-mentioned roller and the above-mentioned conveying mechanism is disposed between the above-mentioned medium for with the changes in the tension of the moving part, in the above-mentioned mobile part for setting a target position of the movable area of the with the target position and the erroneous judgment area separation, the conveyed by the conveyor mechanism in the process of the above-mentioned medium, continuous or intermittent access to the mobile part relative to the position deviation of the position of the above-mentioned objectives, according to the above-mentioned positional deviation to drive the control of the above-mentioned medium supply motor, the above-mentioned mobile part is positioned in the the above-mentioned target position, if the above-mentioned mobile parts to enter the above-mentioned error judgment area, the metering the mobile part of the above-mentioned errors the elapsed time in the judgment area, according to the above-mentioned after time to judge whether there is the occurrence of the error.

In the present invention, can be acted on in accordance with a variation of the tension on the recording paper and the moving parts come to judge whether there is the position of the occurrence of the error-free. In other words, the case of the mobile part, the medium web bonded to the terminal under the condition of the paper, in the lock state of the non-conveying, thus adhered on the movable area of the recording paper becomes larger the ends of the side of the tension of the part. Furthermore, the case of the mobile part, of the medium if it is in the state of the terminal separated from the paper web, is adhered on the movable area of the recording paper of the end part of the small side of the tension. And, the conveying of the recording paper midway of recording paper under the condition of paper, paper jam is moving part of the recording paper is pressed on the end of the movable area of the same. Therefore, if the mobile part of the end part of the movable area of the wrong judgment area is set, through the mobile part of the error judgment area is located in to judge whether there is no paper error, the occurrence of paper jam error. Therefore, does not need to be in order to detect an error without paper, paper jam error and carrying special sensor. Here, because the moving part of the printer configuration for temporarily by the vibration of the situation in the error judgment area. Furthermore, the medium of the winding part of the roller from the roller body of the temporary situation thirdrate, the tension of the medium increases, thereby moving the member is also temporarily configuration for the error judgment area. In view of the above circumstances, in the present invention, according to the moving member in the wrong at the time in the judgment area to judge whether an error occurs. Therefore, exclusion of moving member can be temporarily located in the wrong judgment area come to judge whether there is the condition of the occurrence of the error-free.

In the present invention, preferably, the above-mentioned error judgment area setting in the above-mentioned movable area of the above-mentioned moving member in the moving direction of the end portion. In this case, the medium can be easily the state of use, as to the state of conveying medium detecting errors.

In the present invention, in order to detect the occurrence of the error, preferably, pre-set error judging time, if the elapsed time reaches the above-mentioned error judging time, it is judged that the error mentioned above.

In this case, if the above-mentioned error judging time is set to 5 milliseconds the above 5 seconds the following, and in accordance with the error judging time to detection error, can be in a relatively short time detection error. Therefore, if the error detection after stop medium supply motor, the medium supply motor can avoid a heating state.

Next, of the printer of the present invention is characterized in that, of the roll body with the long strip-shaped medium conveying mechanism, and rotating the roller for the a medium-supplying motor, the above-mentioned printer is provided with: movable part, its configuration in the above-mentioned roller between the above-mentioned conveying mechanism, and for with the changes in the above-mentioned medium to move the tension of the; detector, its to the above-mentioned movement position of the moving member is detected; a control unit, in the above-mentioned conveying mechanism conveying the above-mentioned medium, the control portion is continuously or intermittently relative to achieve the above-mentioned mobile position of the movable member in the movable area of the position of the setting of the target position deviation, and according to the above-mentioned positional deviation to drive the control of the above-mentioned medium supply motor, the above-mentioned movable part disposed on the above-mentioned target position; the mobile part position detector, in the above-mentioned conveying mechanism conveying the above-mentioned medium, the moving member to the position detection in the above-mentioned mobile position is located in the in the above-mentioned movable area of the with the above-mentioned target position setting the separation position of the erroneous judgment area for detecting the condition of; a metering part, to the above-mentioned movement position of the stay in the above-mentioned error judgment area to measure the elapsed time; and error judging unit, according to the above-mentioned same through time to judge whether there is no error.

According to the present invention, can be with the error determination section according to the tension on the recording paper of the movements of the position of the moving part to judge the occurrence of the error-free. In other words, the case of the mobile component, if in the locking state of conveying medium, is adhered on the movable area of the recording paper becomes larger the ends of the side of the tension of the part. Furthermore, the case of the mobile part, of the medium if it is in the state of the terminal separated from the paper web, is adhered on the movable area of the recording paper of the end part of the small side of the tension. And, the conveying of the recording paper midway of recording paper under the condition of paper, paper jam is moving part of the recording paper is pressed on the end of the movable area of the same. Therefore, through the error judgment area comprises a moving unit is set in the end of the movable area of the area of the part, and the like, the error determination section according to the mobile part is positioned in the wrong judgment area to judge whether there is no paper error, the occurrence of paper jam error. Therefore, does not need to be in order to detect an error without paper, paper jam error and carrying special sensor. Here, because the moving part of the printer configuration for temporarily by the vibration of the situation in the error judgment area. Furthermore, the medium of the winding part of the roller from the paper web is not temporarily peeling situation thirdrate, the tension of the medium increases, thereby moving the member is also temporarily configuration for the error judgment area.

In view of the above circumstances, in the present invention, according to the moving member in the wrong at the time in the judgment area to judge whether an error occurs. Therefore, the error judging portion temporarily movable part can be eliminated for the situation of the error judgment area has the occurrence of the error-free.

In the present invention, preferably, the above-mentioned error judgment area of the movable region is set in the above-mentioned mobile part of the end portion on the moving direction. In this case, is used up can be easily the state of the medium, the state of the non-conveying medium as error to detection.

In the present invention, in order to detect the occurrence of the error, preferably, if the elapsed time reaches the preset error judging time, the above-mentioned error determination section determines the occurrence of the above-mentioned error.

In this case, preferably, the above-mentioned error judging time is set to 5 milliseconds the above 5 seconds the following. In this case, in a relatively short period of time to detect errors. Therefore, if the error detection after stop medium supply motor, the medium supply motor can avoid a heating state.

According to the present invention, can be acted on in accordance with a variation of the tension on the recording paper and the moving parts come to judge whether there is the position of the occurrence of the error-free. Therefore, special sensor is not mounted, can be drawn out from the roller to the conveying of the medium of the occurrence of an error in detection.

Description of drawings

Figure 1 is a SUMMARY chart of the application of the invention of the printer.

Figure 2 is graph of that set the allowed movement the moving member is the wrong judgment area in the region.

Figure 3 is a brief block diagram of shown Figure 1 the control system of the printer.

Figure 4 is shows that Figure of non-paper error, the state of the paper jam error.

Figure 5 is flowchart of error detecting operation.

Mode of execution

The following, with reference to the Figure of the application of the invention to explain the embodiment of the printer.

Figure 1 is a SUMMARY chart of the application of the invention of the printer. Figure 2 is graph of that set the allowed movement the moving member is the wrong judgment area in the region. The printer 1 is the (roller body) from the roll paper 2 drawn out of the long strip of the recording paper (medium) 3 implementation of the printed roll paper printer. Furthermore, the printer 1 is used as a printing head 5 line-like printer with line of the ink jet head. As shown in Figure 1, the printer 1 is shown in the imaginary line of the printer body 6 in the inside of the paper roll with 2 paper reel housing portion 7 and is used for the roll paper 2 drawn out of the recording paper 3 of paper conveying path for conveying 8. Paper conveying path 8 from the roll paper housing portion 7 via the start on the basis of the printing head 5 of the printing position of the basket is fixed to the printer A 6 front surface 6a on the upper side of the part of the ejection port 9. Printing head 5 configuration than roll paper housing portion 7 by the position on the top.

In the printing head 5 is provided with the lower side of the paper pressing unit 11. Paper pressing unit 11 with the printing head 5 is separated and the specified interval of opposed pressure surface 11a. A is pressed paper printing position 11a limiting. In the press-paper feed unit 11 for mounting along the paper conveying path 8 transporting the recording paper 3 of the conveying mechanism 12.

The conveying mechanism 12 has an annular conveyer belt 15 and erecting the conveyor belt 15 with the drive roller 16 and a plurality of guide rolls 17-20. Furthermore, the conveying mechanism 12 with conveying motor as a driving source 21. Conveying motor 21 is transmitted to the driving force of the drive roll 16, thereby driving the belt drive roller 16 rotating, by the conveyor belt 15 rotating.

Conveyer belt 15 along the paper pressing unit with 11 extending horizontally on the upper surface of the with the level of the part 15a. Horizontal belt portion 15a limiting pressure surface 11a. In the horizontal tape portion 15a D a conveying direction of a downstream end and an upstream end of the pinch roll 22. Pinch roll 22 pressed on the horizontal belt portion 15a, recording paper 3 in the pinch roll 22 and the horizontal belt portion 15a between the conveying state.

In the roll paper housing portion 7 is provided with a medium feeding mechanism 23. Medium supply mechanism 23 possess and keep rotary web press 2 of the paper core 2a paper reel mounting shaft 24 and is used for making the reel paper mounting shaft 24 for rotation of the (medium supply motor) paper motor 25. Will be available for paper motor 25PWM driving, via the driving force at 26 is transmitted to the roll paper mounting shaft 24. If will be available for paper motor 25 driving to make the continuous paper mounting shaft 24 rotating, is installed in the roll paper mounting shaft 24 rotary web press of 2 is combined with a paper reel mounting shaft 24 integrally rotated.

In the paper conveying path 8 roll paper housing portion 7 and conveying mechanism 12 can be arranged between the acting on the recording paper with 3 changes in the tension of the movement of the displacement member 27. Moving member 27 is provided with the supporting the lower end portion of the recording paper can be around 3 extend parallel to the paper width direction of a rotation center axis of rotation of the L relaxes the pole 28 and is rotatably mounted in relaxes the pole 28 relaxes the roller part of the upper end of the 29. relaxes the pole 28 by the helical spring 30 to force to the rear of the acting force. In other words, mobile part 27 by the helical spring 30 to the recording paper 3 force of direction that the tension is applied. Here, from the housing on the roll paper accommodating section 7 rotary web press of 2 is drawn out toward the recording paper above 3 relaxes the roller at 29, along the relaxes the roller and 29 bent forwards after extending to the front. Furthermore, also can replace the spiral spring 30 in relaxes the pole 28 and the rotation center of the shaft L is placed at the vicinity of the coil spring, and utilize the relaxes the pole the coil spring 28 to relaxes the roller 29 force the moving direction of the to the rear.

In relaxes the pole 28 L of the center of rotation of the shaft in the vicinity of the moving member is provided with a detecting part 27 (relaxes the pole 28) of the movement position of the (detector) of the rotary encoder 31. Rotary encoder 31 around the rotation center shaft with the L relaxes the pole 28 rotate integrally coding disk 32 and is disposed in the the coding disc 32 between the outer peripheral portion of the fixed position of the detector 33. From the detector 33 output moving member 27 of the mobile position now.

Here, mobile part 27 in relaxes the pole 28 upright to close to a vertical state limit position matchlines 27A and relaxes the pole 28 is inclined to the rear side of the posture of the limit position the slack of 27B mobile between. In other words, the limit position the tight 27A limit position with the slack side 27B is between the mobile part 27 allows the mobile area of the (movable area) E0. The limit position the tight 27A is located at the limit position than the slack side 27B the position of the more the front of the. In allow the mobile area E0 to the displacement member 27 is disposed in the center of the direction of movement of the position of the targeted 27C. Target position 27C is recording paper 3 is always in the transport configuration with a movable member 27 of the target position.

Furthermore, the allowed movement area E0 is used to set the error judgment area detection errors. Error judgment area far away from the target position set in 27C position. In this example, as error judgment area, with the central shaft is set to the limit position L including around tight 27A in the predetermined angular range of the error judgment area matchlines E1 and is set to the rotation center axis L, including slack side limit position around 27B in the predetermined angular range of the relaxation of the error judgment area side of the E2.

(Control system)

Figure 3 is a brief block diagram of the printer is shown 1 of the main part of the control system. The printer 1 with the control system of the CPU, the memory of the printer control portion 34 a in the center. In the printer control portion 34 can be connected with an external machine communication between the communication section 35, and a rotary encoder 31 of the detector 33. In the printer control portion 34 of the output side, via the not shown drive is connected with a printing head 5, the conveying motor 21, for paper motor 25.

The printer control portion 34 are concerned, if via the communication section 35 from the outside of the print data supplied to a machine, the conveying motor drive control the printing head 21 and 5 carry out printing. In other words, the printer control section 34 drive control conveying motor 21 the use of the conveying mechanism 12 to a certain speed conveying recording paper 3, and the printer control portion 34 drive control printing head 5 through a printing position to the recording paper A 3 printed printing data.

Furthermore, printer control part 34 includes a drive control for paper motor 25 the paper feeding motor drive control part 36. For paper motor drive control section 36 having feedback control part 37 and the wrong detector (error determination section) 38.

The feedback control part 37 with deviation acquiring section 39 and PID control part 40. From the detector 33 to the deviation acquiring section 39 input that the mobile part 27 of the movement position of the now of value.

Deviation acquiring section 39 a in order to pre-set the period of the target position from said 27C the value subtracts that the mobile part of the 27 of the movement position of the now of the position deviation value. Said target position 27C maintain the value of the pre-stored in the memory. In this example, the period of the position deviation is 1 millisecond.

PID control part 40 to the drive for paper motor through 25 accounts for the spatial value of the control of the PWM signal to drive control for paper motor 25. PID control part 40 according to the deviation acquiring section 39 are sequentially made of the position deviation, in order to reduce the position deviation of the feedback control for paper motor manner 25, so as to make the movable member 27 is located in the target position 27C. In other words, for paper motor drive control section 36 based on the conveying mechanism 12 of the recording paper 3 in the transport, using PID control drive for paper motor 25 to make the rotary web press 2 rotating, thereby carrying out recording paper 3 from the roll paper 2 drawn out or recording paper 3 to the web 2 of the winding, thus make the movable member 27 is located in the target position 27C, inhibiting acting on the recording paper 3, changes in the tension of.

Error detector 38 possesses the mobile position determining section 41, the elapsed time measuring part determination section 42 and 43. From the detector 33 to the mobile position determining section 41 input that the mobile part 27 of the movement position of the now of value. Mobile position determining section 41 to represent each fault judgment area E1, E2 with the value of the that the mobile part 27 of the movement position of the now of the comparison value, so as to judge the moving member 27 is located in each fault judgment area E1, E2 of the situation. The error judgment area that E1, E2 to maintain the value of the pre-stored in the memory.

The time-measuring portion 42 with the timer, the mobile component position judging unit 41 judges the mobile part 27 error judgment area located in the E1, E2, the mobile part 27 in all error judgment area at E1, E2 to the elapsed time of the state of measurement. In other words, the part position judging unit 41 judges the mobile member 27 is located in each fault judgment area E1, E2 time for metering.

The judgment part 43 speaking, if the elapsed time reaches the preset error judging time, for an error occurs is determined. In this example, the error judging time is set to 5 milliseconds the above 5 seconds the following. If the determination section 43 judge for error, the error detector 38 to detect errors.

Here, the drive control part paper motor 36 speaking, if the wrong detector 38 a detected error, stop to supply paper motor 25 power supply, thus stop for paper motor 25.

(Printing error detection and action action)

Printing, the recording paper 3 from the mounting for the roll paper mounting shaft 24 rotary web press of 2 after to above is drawn out, the movable part 27 relaxes the roller of 29 and bent to the front, then A manner via the printed position along the paper conveying path 8 and set up. If the recording paper 3 is provided on the paper conveying path 8 from the outside under the state of the machine supplying printing data, the printing control section 34 for driving the conveying motor 21 and printing head 5 to by the conveying mechanism 12 to a certain speed conveying recording paper 3 by the printing position on the recording paper A 3 printed printing data.

In the recording paper 3 in the transport, paper feeding motor drive control part 36 movable component in a certain cycle 27 relative to the target position 27C of the position deviation, and according to the position deviation of the sequentially calculated to obtain a P, a a I and D, thus through paper motor PID control to drive the for 25. Therefore, on the recording paper can be suppressed 3, changes in the tension of the, thus can inhibit due to fluctuations in the tension of the recording paper 3 changes in the conveying speed.

For example, on the recording paper 3 in the transport, the web 2 and cause the inertia of the conveying of the recording paper 3 D to the conveying direction by the pull-out of the opposite direction, the movable member 27 from the target position 27C limit position towards the tight 27A rotating. At this moment, as shown in Figure 2, position deviation to the + direction (the direction of the [...]) increase, so in order to reduce the position deviation, from the roll paper 2 drawn out recording paper 3 for driving in such a manner that the paper motor 25. Therefore, the mobile member 27 is disposed on the target position 27C, thereby suppressing acting on the recording paper 3, changes in the tension of.

Furthermore, on the recording paper 3 in the transport, the web 2 and cause the inertia of the recording paper 3 faster than the conveying speed to the conveying direction of the extracted D, mobile part 27 from the target position 27C limit position towards the slack 27B rotating. At this moment, as shown in Figure 2, to the-direction of the position deviation (in the direction to reduce the tension of) increase, so in order to reduce the position deviation, in order to record paper 3 wound on the roll for paper motor is driven in a manner of continuous paper 25. Therefore, the mobile member 27 is disposed on the target position 27C, thereby suppressing acting on the recording paper 3, changes in the tension of.

In this example, the PID control part 40 will be available for paper motor 25 control to quickly meet mobile part 27 of the displacement. Therefore, under the normal state, the movable member 27 in the target position 27C as the center and not reaching the various error judgment area E1, E2 to swing within the angle range of.

Here, on the recording paper 3 in the transport, the recording paper 3 the paperless error, recording paper 3 in the paper jam lock error state. Figure 4 is shows that Figure of non-paper error, the state of the paper jam error. Figure 5 is flowchart of error detecting operation.

For example, when using the terminal in printing on roll paper 2 paper core 2a of the recording paper 3 is, in case of recording paper 3 is under the situation of the paperless error, as shown in Figure 4 (a) shown in, recording paper 3 are fed by a feeding mechanism 12 is dragged D to the conveying direction, acts on the recording paper thus in a 3 state of the larger tension. And, recording paper 3 into unable to transport the locked state.

In this situation, mobile part 27 from the target position 27C to front rotation, thus the limit position the tight 27A. Therefore, mobile part position judging unit 41 judges the mobile part 27 is located on the wrong judgment area tight E1 (step ST1). If it is judged that the mobile part 27 is located on the wrong judgment area tight E1, through the time measurement unit 42 to the mobile part to 27 remain at the wrong judgment area tight E1 to measure the elapsed time (step ST2).

Here, if the mobile part 27 is disposed the limit position the tight 27A, then in order to make the movable member 27 to return to the target position 27C and in order to make the roll paper 2 to take out the recording paper 3 in the direction of R1 paper motor rotate for driving in such a manner that the 25. However, from rotary web press 2 can not be drawn out recording paper 3, so that the mobile part 27 is in the limit position the tight 27A state. As a result, mobile part 27 remain at the wrong judgment area tight E1 elapsed time exceeds the error judging time (step ST3, ST4). Therefore, judging unit 43 determined to be wrong. By this error detector 38 detection error (step ST5).

If the wrong detector 38 a detected error, the drive control part for paper motor 36 for paper motor to stop 25 of the power supply, thus stop for paper motor 25 (step ST6). Here, if not stop to supply paper motor 25 power supply, to the moving member 27 is disposed on the target position 27C medium supply motor to supply greater power, thus cause paper motor 25 heating, however, according to the embodiment can avoid such a situation.

Furthermore, for example, when used in printing paper roll bonded to the terminal 2 of the paper core 2a of the recording paper 3 is, in case of recording paper 3 is under the situation of the paperless error, as shown in Figure 4 (b) shown by the, recording paper 3 on the recording paper 3 with the paper web in the vicinity of the terminal 2 of the paper core 2a separation. Therefore, contrary to the conveying direction is dragged D the direction of the recording paper 3 force disappears, thus acting on the recording paper 3 the tension becomes zero.

In this situation, mobile part 27 from the target position 27C rotate to the rear limit position and is disposed on the slack side 27B. Therefore, mobile part position judging unit 41 judges the mobile part 27 is located on the wrong judgment area slack side of the E2 (step ST1). If it is judged that the mobile part 27 is located on the wrong judgment area slack side of the E2, through the time measurement unit 42 to the mobile part to 27 remain in the slack side error judgment area E2 to measure the elapsed time (step ST2).

Here, if the mobile part 27 is disposed on the slack side limit position 27B, then in order to make the movable member 27 to return to the target position 27C and in order to make the roll paper 2 to the rolled recording paper 3 in the direction of R2 paper motor rotate for driving in such a manner that the 25. However, recording paper 3 can not be wound on the roll paper 2, so the movable member 27 to maintain the slack side limit position stuck 27B state. As a result, mobile part 27 remain in the slack side error judgment area E2 of the error time is greater than a determination time (step ST3, ST4). Therefore, judging unit 43 determined to be wrong. By this error detector 38 detection error (step ST5).

If the wrong detector 38 a detected error, the drive control part for paper motor 36 for paper motor to stop 25 of the power supply, thus stop for paper motor 25 (step ST6). Here, if not stop to supply paper motor 25 power supply, to the moving member 27 is disposed on the target position 27C medium supply motor to supply greater power, thus cause paper motor 25 heating, however, according to the embodiment can avoid such a situation.

Furthermore, for example, on the recording paper 3 of the recording paper conveying the way 3 in the jam state, thus with the conveying mechanism 12 cannot transporting the recording paper 3 of paper jam error, in this case, as shown in Figure 4 (c) shows, the presence of a jam of the recording paper 3 part of the moving member 27 limit position the tight cavity 27A situation.

In such circumstances, the mobile component position judging unit 41 judges the mobile part 27 is located on the wrong judgment area tight E1 (step ST1). If it is judged that the mobile part 27 is located on the wrong judgment area tight E1, through the time measurement unit 42 to the mobile part to 27 remain at the wrong judgment area tight E1 to measure the elapsed time (step ST2).

Here, if the mobile part 27 is disposed the limit position the tight 27A, then in order to make the movable member 27 to return to the target position 27C and in order to make the roll paper 2 to take out the recording paper 3 in the direction of R1 paper motor rotate for driving in such a manner that the 25. However, use of the conveying mechanism 12 cannot transporting the recording paper 3, so that the mobile part 27 is caused by the jam of the recording paper 3 part of the limit position the tight cavity 27A state. As a result, mobile part 27 remain at the wrong judgment area tight E1 elapsed time exceeds the error judging time (step ST3, ST4). Therefore, judging unit 43 determined to be wrong, so the wrong detector 38 detection error (step ST5).

If the wrong detector 38 a detected error, the drive control part for paper motor 36 for paper motor to stop 25 of the power supply, thus stop for paper motor 25 (step ST6). Here, if not stop to supply paper motor 25 power supply, to the moving member 27 is disposed on the target position 27C medium supply motor to supply greater power, thus cause paper motor 25 heating, however, according to the embodiment can avoid such a situation. Furthermore, if not stop to supply paper motor 25 power supply, will lead to continued out recording paper from the paper web 3, but according to the embodiment it is possible to prevent such a situation.

Furthermore, on the recording paper 3 in the transport, the moving member 27 of the printer 1 for the time being by the vibration of an error judgment area located in the E1, E2 of the. Furthermore, paper roll in the winding 2 of the recording paper 3 from the not yet part of the roll paper 2 peeling situation thirdrate, also the moving member 27 is temporarily disposed on every error judgment area E1, E2 of the. However, in this instance, the wrong detector 38 according to the mobile part 27 in all error judgment area at E1, E2 to an erroneous detection of the elapsed time. Therefore, there is no because of the movable member 27 to the error judgment area E1, E2 of the mobile temporarily in the detection of an error.

(Effect)

According to the embodiment, on the recording paper according to the can with the 3, changes in the tension of the moving parts and 27 come to judge whether there is the position of the occurrence of the error-free, for detecting therefore not carry paperless error, paper jam error specific sensor, will be able to to from the roll paper 2 drawn out of the recording paper 3 in the transport of the error detection.

Furthermore, in this example, the position deviation is set as a period of 1 millisecond, and the error judging time is set to 5 milliseconds the above 5 seconds the following. Therefore, in a relatively short period of time to detect errors. Therefore, in the error detection for paper motor stopped after 25, it is possible to avoid for paper motor 25 is in the heating state.

Furthermore, in the above example, mobile part 27 to the rotation of the central shaft L as a center to rotate, but can also be on the recording paper with the 3 the tension of the straight line of the movements of the mobile.

Furthermore, in the above-mentioned examples, will dispose the movable member 27 of the target position 27C set in the mobile part 27 allows the mobile area of E0 of the central, however, for example, also can be in the allow the mobile area E0 mobile part 27 of the movement direction of the end of one side of the target position set 27C. At this moment, can, for example, in order to include allow the mobile area E0 mobile part 27 on the direction of movement of the end of the other side of the setting error judgment area of the way.

And, in the above-mentioned example, the conveying mechanism 12 using delivery motor 21 drives the conveying belt 15 to transporting the recording paper 3, but as conveying mechanism, can also be made by using delivery motor driven conveying roller mechanism for conveying the recording paper. Furthermore, PID control part 40 for PID control to drive through paper motor 25, but also can be through PD control, PI control to drive the for paper motor 25.