JP3864640B2 - Printer and control method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printer that performs printing on continuous paper and a control method thereof, and more particularly, to a printer and a control method thereof characterized by transport control of continuous paper after printing.
[0002]
[Prior art]
2. Description of the Related Art As printers built in an ATM device and the like for outputting receipts and the like, a printer equipped with roll paper or other continuous paper, which is appropriately cut and separated by an auto cutter mechanism, is widely known. Since this type of printer is often installed in a place where the administrator or engineer is not resident, it is an important issue to minimize the troubles associated with its use.
[0003]
In this type of printer, it is necessary to fully consider the conveyance control of the paper after the end of printing. In a normal printer, the leading edge of the paper after printing is completed or during printing is sequentially discharged from the discharge port to the outside of the housing by a paper feeding operation accompanying the printing. However, if the user tries to pull out the paper that has jumped out of the discharge port before the paper is cut by the auto cutter mechanism, this may cause printing failure or paper jam.
[0004]
In order to prevent such problems, conventionally, the paper feed by the discharge roller provided near the discharge port is temporarily stopped so that the leading edge of the paper does not come out of the discharge port, and the cutting of the paper is completed. In some cases, paper feeding is resumed and then discharged. In this case, until the cutting of the paper is completed, the paper after the completion of printing is temporarily stored in a bent state on the upstream side of the discharge port.
[0005]
[Problems to be solved by the invention]
However, when the paper after printing is bent, there is no problem if it is a normal printing amount, but at the time of self-check to check the printing status of the printer or hexadecimal dump to check the data sent to the printer When the amount of printing is large, such as when outputting or when outputting a print history journal, the length of the sheet after printing is long, so that it is not possible to bend all of it upstream of the discharge port. Therefore, when the amount of bent paper reaches a certain amount, it is necessary to divide the paper and discharge it, and then perform the remaining printing to divide the printing once into a plurality of sheets. There was a problem.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described conventional problems and provide a printer and a control method therefor that can print on a single continuous sheet without dividing into a plurality of sheets even when the amount of printing at one time is large. There is to do.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a control method for a printer having a plurality of types of printing modes with different continuous paper transport methods during printing, and (a) determining a printing mode set by a predetermined method. And (b) a mode in which printing is performed by stopping the printed area of the continuous paper on the upstream side of the discharge port of the printer as necessary according to the determination result, or the printed area is A step of performing printing in a mode in which printing is performed while being conveyed from the discharge port; and (c) a step of receiving an instruction to cut the continuous paper and cutting the continuous paper.
[0008]
In the control of the present invention, a printing mode suitable for the printing amount is set prior to printing, and printing is performed according to this printing mode. When the amount of printing is large, printing is performed while discharging the printed region without bending it, so that it is possible to print on a continuous sheet without dividing each printing into a plurality of prints.
[0009]
In addition, the mode in which printing is performed by stopping the printed area detects the amount of bending of the continuous paper formed by stopping the printed area, and whenever this amount of bending exceeds a predetermined amount, A mode in which the printed area is discharged and cut to perform the remaining printing, or the amount of bending of the continuous paper formed by stopping the printed area is detected, and each time the amount of bending exceeds a predetermined amount Until the deflection amount becomes equal to or less than the predetermined amount, a mode in which the printed area at that time is discharged and the remaining printing is performed can be configured.
[0010]
That is, even when the printed region is temporarily bent, printing is performed separately for each of the plurality as in the prior art, or printing is performed every time the amount of bending becomes longer. it can. Even in the latter case, it is possible to print on continuous paper without dividing a single printing into a plurality of prints.
[0011]
Such determination of the print mode can be performed by decoding a command sent to the printer or by determining the switching state of the switching means for switching the print mode.
[0012]
Further, in a mode in which printing is performed while transporting a printed area, a feed roller that transports the printed area toward the discharge port and a discharge roller installed near the discharge port are transported between them. You may control so that the difference in speed may be in the range which does not apply the tensile force more than predetermined value with respect to the said continuous paper.
[0013]
By controlling in this way, the tensile force applied to the continuous paper can be suppressed within a certain range, and the continuous paper can be prevented from being torn.
[0014]
The present invention also relates to a printer having a plurality of types of printing modes with different methods for conveying continuous paper during printing. The printer of the present invention is provided in the vicinity of the first transport means for transporting the printed region of the continuous paper toward the discharge port of the printer and the printed region of the continuous paper. A second transport unit that transports out from the discharge port and a preset print mode are discriminated, and according to the result of the discrimination, the transport by the second transport unit is stopped as necessary and the first transport mode is stopped. A mode for performing printing on the continuous paper without stopping conveyance by the conveying means, or a mode for performing printing on the continuous paper without stopping conveyance by the first conveying means and the second conveying means, And a control means for performing printing.
[0015]
The printer of the present invention further includes a deflection amount detection unit that detects a deflection amount of the continuous paper formed by stopping the printed region, and a mode in which the conveyance by the second conveyance unit is stopped as necessary. In the case of performing printing in the mode, every time the amount of deflection detected by the amount of deflection detection means becomes a predetermined amount or more, a mode in which the printed area at that time is discharged and cut and the remaining printing is performed, or Each time the detected amount of deflection becomes equal to or greater than a predetermined amount, a mode can be set in which the printed region is discharged and the remaining printing is performed until the amount of deflection is equal to or less than the predetermined amount.
[0016]
Further, the control means is configured to determine the print mode by decoding a command sent to the printer or by determining a state of a switching means provided for switching the print mode. Can do.
[0017]
Furthermore, when the control unit performs printing in a mode in which the conveyance of the first conveyance unit and the second conveyance unit is not stopped, the control unit moves the first conveyance unit and the second conveyance unit between each other. It is preferable to control so that the difference in the conveyance speed is within a range in which a tensile force of a predetermined value or more is not applied to the continuous paper.
[0018]
Alternatively, a clutch mechanism that idles the second transport unit when a tensile force of a predetermined value or more is applied to the continuous paper may be provided.
[0019]
Also in this case, by pulling the second conveying means when a large tensile force is applied to the continuous paper, the tensile force applied to the continuous paper can be kept within a certain range, and the continuous paper is torn. This can be prevented.
[0020]
The first transport unit includes a feed roller that transports the printed region toward the discharge port, and the second transport unit transports the printed region from the discharge port. A discharge roller that
The feed roller and the discharge roller are driven by a step motor, and the ratio of the mutual feed speed is + 10% to −10% of the discharge roller with respect to the feed roller.
[0021]
Further, the ratio of the mutual feed speeds is characterized in that the discharge roller is 0 to -5% with respect to the feed roller.
[0022]
By setting such a ratio of the feeding speeds, the rotation of the discharge roller is slightly slower than that of the feeding roller when printing on continuous paper without stopping the conveyance by the first conveying unit and the second conveying unit. However, since the roll paper is in the direction of bending between the discharge roller and the feed roller, the roll paper is not pulled, the printing quality is improved, and when the feed roller transports the roll paper, The roll paper does not slip in the vicinity of the feed roller.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic side view showing the internal structure of a printer according to an embodiment of the present invention. The printer 10 is a receipt printing printer mounted on an ATM or the like, and stores the roll paper R therein. A print head 12, a paper cutting mechanism 13, a feed-side discharge roller (hereinafter referred to as a feed roller) 14 and a discharge-side discharge roller (hereinafter referred to as a “feed roller”) are disposed on a paper path that communicates from the roll paper R storage portion to the roll paper discharge port 11. (Referred to as first and second discharge rollers) 15 and 16. In accordance with a printing command from the host, these transport rollers are appropriately driven, and the roll paper R is sequentially pulled out from the roll portion. As the roll paper R is fed by the feed roller 14, the print head 12 is scanned to print desired characters, symbols, and the like on the roll paper R. The printed region of the roll paper R is further conveyed toward the discharge port 11, and when the trailing end reaches the position of the paper cutting mechanism 13, the printed region is cut and separated by this, and a single-sheet receipt from the discharge port 11. Supplied to users.
[0024]
The first and second discharge rollers 15 and 16 receive the leading edge of the roll paper R fed by the feed roller 14 and guide it to the discharge port 11. The leading end portion (hereinafter referred to as “paper r”) of the paper cut from the upstream portion of the roll paper R by the paper cutting mechanism 13 is continuously conveyed by the first and second discharge rollers 15 and 16, and substantially the entire area thereof is conveyed. It is sent out from the discharge port 11. The discharge roller 16 on the downstream side in the transport direction pinches the paper r with a weaker pressing force than the discharge roller 15 on the upstream side. The rear end of the cut sheet r is finally held by the second discharge roller 16 on the downstream side. Thus, since the paper r is held by the second discharge roller 16 with a weak force, the user can easily pull it out. Regarding the control according to the present invention, the first and second discharge rollers 15 and 16 are driven and stopped independently of the feed roller 14. Details of this control will be described later.
[0025]
The printer 10 further includes a paper sensor 17 between the two pairs of first and second discharge rollers 15 and 16. The paper sensor 17 detects this when the roll paper R is transported and its leading edge exceeds the upstream first discharge roller 15. The paper sensor 17 also detects this when the trailing edge of the cut paper r exceeds this. Various controls are executed based on detection signals from the paper sensor 17.
[0026]
The printer 10 includes a collection device 20 for the receipt r that has been cut and separated. When the receipt r is left in the discharge port 11 for a predetermined time, the first and second discharge rollers 15 and 16 reversely feed the receipt r based on a command from the host computer and enter the printer 10. Pull in. The receipts r drawn in are carried into the collection path 21 and sequentially collected into the collection tray 22.
[0027]
The printer 10 is equipped with a control CPU and ROM (not shown). A CPU mounted on the printer 10 controls each mechanism portion of the printer in accordance with a control command from a host computer and a control program stored in the ROM. In connection with the present invention, the CPU built in the printer drives and controls the feed roller 14, the discharge rollers 15 and 16, and the paper cutting mechanism 13 to realize a predetermined paper discharge operation.
[0028]
Hereinafter, the discharge control in the printer 10 will be described. FIG. 2 is a main flowchart of the printing process in the printer according to the present invention.
[0029]
When the printer 10 receives data from the host computer, the printer 10 temporarily stores it in a reception buffer (not shown), sequentially interprets the contents by an interpreter realized by the CPU, and the interpreted data is a print command. In this case, the printing process is performed. Prior to this, one desired print mode among the three types of print modes from mode 1 to mode 3 is set in the printer.
[0030]
In mode 1, as in the conventional case, printing is performed while bending the printed area on the upstream side of the discharge port 11, and the printed area is cut every time the amount of bending becomes a predetermined amount or more. This is a mode in which the remaining printing is performed after completely discharging.
[0031]
Mode 2 is a mode in which printing is performed while discharging the printed region without bending.
[0032]
Mode 3 is a mode in which the printed region is once bent and the printed region is discharged by a certain amount each time the amount of deflection becomes a predetermined amount or more, and the remaining printing is performed. Of these modes, mode 1 is a mode for normal printing, while mode 2 and mode 3 are set when the printing amount is large, for example, when a journal history is output by maintenance personnel.
[0033]
The print mode may be set by an arbitrary method. For example, the mode setting command for setting the mode is included in the data sent from the host computer, and the CPU interprets the contents of the mode setting command. This may be done by switching the flag state inside the printer 10. Alternatively, for example, a dip switch may be provided in the printer 10 as switching means for switching the mode, and the switch setting of the dip switch may be switched. The CPU first determines the print mode by confirming the state of the flag or the state of the dip switch (step 201 in FIG. 2), and performs print processing in a mode according to the result (steps 202 to 204).
[0034]
First, the printing process in mode 1 will be described. FIG. 3 is a side view of the vicinity of the discharge unit showing the discharge state of the roll paper R in mode 1, and FIG. First, the CPU scans the print head 12 while feeding the paper r by the feed roller 14, and performs printing according to the print data following the print command sent from the host computer. This printing is performed every predetermined length (for example, every line), and the feed roller 14 conveys the paper r by the predetermined length every time printing is performed (step 601). Next, the CPU confirms whether or not the paper r is detected by the paper sensor 17 (step 602). If not detected yet, the CPU drives the discharge rollers 15 and 16 in synchronization with the feed roller 14 (step 603). ). With this printing operation, the paper r is gradually sent toward the discharge port 11. This printing and conveyance of the paper r are repeatedly performed until a predetermined determination is made in step 605 or step 607 described later.
[0035]
When the leading edge of the paper r is eventually detected by the paper sensor 17, the first and second discharge rollers 15 and 16 are stopped (step 604). Therefore, the leading edge of the paper r between the first discharge roller 15 and the second discharge roller 16 is sandwiched here (FIG. 3A). Further, when the process 601 is repeatedly executed, the paper r is gradually bent, and a loop is formed between the print head 12 and the first discharge roller 15 (FIG. 3B).
[0036]
Here, every time printing is performed, the CPU monitors whether or not a cutting command for executing cutting of the paper r has been sent from the host computer (step 605), and if the cutting command has not been sent, The amount of deflection of the paper r is calculated (step 606). Here, the amount of deflection can be the amount of paper r fed by the feed roller 14 after the first discharge roller 15 is stopped. Then, it is determined whether or not the calculated deflection amount is greater than or equal to a predetermined amount (step 607). If it is not greater than the predetermined amount, printing is performed again. As the predetermined amount, for example, the length of the paper r that can be stored between the feed roller 14 and the first discharge roller 15 without any trouble can be set.
[0037]
Here, when the process 601 is repeatedly performed, the amount of bending of the paper r becomes large, and it is finally determined in the step 607 that the amount of bending is equal to or larger than a predetermined amount. Then, the CPU first drives the first and second discharge rollers 15 and 16 (step 608), and then drives the paper cutting mechanism 13 to cut the trailing edge of the paper r (step 609). This cutting of the paper r is completed before the formed deflection is completely eliminated. The paper r separated from the roll paper R by the paper cutting mechanism 13 is conveyed out of the discharge port 11 by the first and second discharge rollers 15 and 16 as shown in FIG. When the trailing edge of the paper r exceeds the paper sensor 17 and this is detected, the driving of the first and second discharge rollers 15 and 16 is stopped. As a result, the rear end portion of the paper r is weakly held by the second discharge roller 16 and can be taken out by the user.
[0038]
Thereafter, steps 601 to 609 are repeated until it is determined in step 605 that a disconnect command has been sent. Thereafter, when all printing of the print data is completed and it is determined in step 605 that a cutting command has been sent from the host computer, the first and second discharge rollers 15 and 16 are driven as in steps 608 to 609. Then (step 610), the paper cutting mechanism 13 is driven to cut the trailing edge of the paper r (step 611). This completes all processing.
[0039]
According to this mode 1 printing process, the printed paper r is not discharged from the discharge port 11 before being cut, so that the paper r is torn by being pulled carelessly as in the prior art. Is prevented. Further, when the print amount is small, the amount of deflection does not exceed a predetermined amount. Therefore, steps 610 to 611 are executed before the steps 608 to 609 and are discharged as a single sheet. On the other hand, when the amount of printing is large, the paper r is once discharged every time the amount of deflection exceeds a predetermined amount by going through Steps 608 to 609. Can be printed separately.
[0040]
Next, the printing process in mode 2 will be described. 4 is a side view of the vicinity of the discharge unit showing the discharge state of the roll paper R in mode 2. FIG. 7 is a flowchart of printing processing in mode 2. The CPU performs printing every predetermined length while feeding the paper r by the feed roller 14. Further, every time printing is performed, the CPU drives both the feed roller 14 and the first and second discharge rollers 15 and 16 to convey the paper r by the predetermined length (step 701). This is the state shown in FIG.
[0041]
Next, the CPU monitors whether or not a disconnect command has been sent from the host computer (step 702), and repeatedly executes step 701 until a disconnect command is sent. In this step 701, not only the feed roller 14 but also the first and second discharge rollers 15 and 16 are driven, so that the paper r is not bent as shown in FIG. It is continuously discharged from the discharge port 11.
[0042]
Here, the conveyance of the paper r by the feed roller 14 and the first and second discharge rollers 15 and 16 is performed so that the paper r is not pulled and torn. For example, the feed roller 14 and the first and second discharge rollers 15 and 16 may be driven by using the same type of motors and gears and rotated in synchronization with each other. Alternatively, the feed roller 14 and the first and second discharge rollers 15 and 16 are driven by a drive source (for example, a step motor) with relatively high rotation control accuracy. Each roller can also be controlled synchronously so that the difference in transport speed between the discharge rollers 15 and 16 is within a range (within ± 10%) in which a pulling force that breaks the paper r is not applied. In this case, the rotation speeds of the first and second discharge rollers 15 and 16 (in this embodiment, the first and second discharge rollers 15 and 16 are directly connected to the rotation speed of the feed roller 14 and are the same. If the rotation speed is preferably 0% to -5%, the feed roller 14 is equal to or greater than the first discharge roller 15. Therefore, even when printing is performed for a long time in the continuous printing mode without bending, the feed roller 14 Although the roll paper may bend between the roller 14 and the first discharge roller 15, it is not pulled. Therefore, no slip due to the pulling force occurs between the feed roller 14 and the thermal print head 12.
[0043]
Alternatively, the first and second discharge rollers 15 and 16 are driven by a drive source (for example, a DC motor) having a relatively low rotation control accuracy, and the first and second discharge rollers 15 and 16 have a clutch mechanism. When a pulling force that breaks the paper r is likely to be applied, the tension of the paper r may be weakened by causing the discharge rollers 15 and 16 to idle by a clutch mechanism. Therefore, no pulling force is applied to the paper r and no excessive bending occurs.
[0044]
Thereafter, when it is determined in step 702 that a cutting command has been sent, first, the paper cutting mechanism 13 is driven to cut the trailing edge of the paper r (step 703), and then the first and second discharge rollers. 15 and 16 are driven (step 704, FIG. 4C). This completes the printing process. Since the discharge roller starts to rotate after the cutting, the paper is not cut while being pulled, and the paper can be prevented from being torn due to the cutting operation.
[0045]
According to the printing process in mode 2, even when the amount of printing is large, printing is performed while discharging the paper r, so that printing can be performed without cutting the paper r. In addition, since it is not necessary to calculate the amount of bending or to determine whether the amount of bending is equal to or greater than a predetermined amount, it is possible to reduce the load on the CPU. In this mode 2, printing is performed without bending the paper r. However, since this mode is used by a specialist such as a maintenance staff when the amount of printing is large, the paper r is careless before being discharged. There is no problem of being pulled and torn.
[0046]
Finally, the printing process in mode 3 will be described. FIG. 5 is a side view of the vicinity of the discharge unit showing the discharge state of the roll paper R in mode 3, and FIG. 8 is a flowchart of the printing process in mode 3. Since the steps 801 to 807 in the mode 3 are the same as the steps 601 to 607 in the mode 1 described above, the description thereof is omitted. In this mode 3, the sheet r is sent to the first discharge roller 15 (FIG. 5A), and in a further bent state (FIG. 4B), the amount of bending becomes a predetermined amount or more in step 807. If it is determined that the first and second discharge rollers 15 and 16 are driven, the first and second discharge rollers 15 and 16 are driven (step 808). Accordingly, the sheet r is discharged from the discharge port 11 and the amount of bending is reduced (FIG. 5C). The first and second discharge rollers 15 and 16 are driven until the amount of bending calculated again (step 809) is equal to or less than a predetermined amount (step 810). When the amount is equal to or less than the predetermined amount, the CPU stops the discharge rollers 15 and 16 (step 811), returns to step 801, and repeats printing. Thereafter, steps 801 to 811 are repeated until it is determined in step 805 that a disconnect command has been sent from the host computer.
[0047]
The predetermined amount serving as the determination criterion in step 810 may be the same predetermined amount as the determination criterion in step 807, or a different amount may be set. For example, if both predetermined amounts are 23 mm, the process proceeds to Steps 808 to 810 in a state where the deflection amount is 23 mm or more, the paper r is discharged so that the deflection amount is always 23 mm, and printing is repeated. It is. That is, after the deflection amount becomes 23 mm, printing is performed while the paper r is continuously discharged. Alternatively, when the predetermined amount in step 807 is 23 mm and the predetermined amount in step 810 is 15 mm, the process proceeds to steps 808 to 810 with the deflection amount being 23 mm or more, until the deflection amount is 15 mm (only 8 mm). The paper r is discharged and printing is repeated. That is, in this case, printing is performed while the paper r is intermittently discharged. The amount of deflection in step 809 can be calculated by subtracting the amount of paper r fed by driving the first and second discharge rollers 15 and 16 from the amount of deflection calculated in step 806.
[0048]
Thereafter, if it is determined in step 805 that a cutting command has been sent from the host computer, the discharge rollers 15 and 16 are driven (step 812), and the paper cutting mechanism 13 is driven, as in steps 610 to 611. The rear end is cut (step 813, FIG. 5 (d)). This completes all processing.
[0049]
According to the printing process in mode 3, when the printing amount is small, the printing can be performed by bending the paper r as in the conventional case, and when the printing amount is large, the paper r is discharged without being cut. However, printing can be performed. In this case, printing can be performed while the sheet r is bent, and therefore printing can be performed without particularly considering the tensile force applied to the sheet r.
[0050]
As mentioned above, although one embodiment of the present invention has been described with reference to the drawings, the present invention is not limited to the matters shown in the embodiment, and the description of the claims and the detailed description of the invention, as well as the well-known technology. Based on the above, a range in which those skilled in the art can make changes and applications thereof is included. For example, either mode 2 or mode 3 may be omitted, or a mode 2 or mode 3 dedicated machine may be used without switching modes.
[0051]
【The invention's effect】
As described above, according to the present invention, first, a print mode suitable for the print amount is set, and printing is performed according to this print mode. When the amount of printing is large, printing is performed while discharging the printed region without bending it, so that it is possible to print on a continuous sheet without dividing each printing into a plurality of prints.
[0052]
Further, according to the present invention, the print mode can be switched by sending a command or setting a switching means such as a dip switch, and a print mode suitable for the print amount can be easily set.
[0053]
Furthermore, according to the present invention, even when the printed region is temporarily bent, in addition to printing separately for each of the plurality as in the prior art, this is discharged every time the bending amount becomes long, Printing can be performed. Even in the latter case, it is possible to print on continuous paper without dividing a single printing into a plurality of prints.
[0054]
In addition, by suppressing the difference in transport speed between the feed roller and the discharge roller within a certain range, the tensile force applied to the continuous paper can be suppressed within a certain range, and the continuous paper can be prevented from being torn. .
[0055]
Or, when a large tensile force is applied to the continuous paper, the second conveying means is idled so that the tensile force applied to the continuous paper can be kept within a certain range, and the continuous paper is torn. Can be prevented.
[Brief description of the drawings]
FIG. 1 is a schematic side view showing an internal structure of a printer according to an embodiment of the present invention.
FIG. 2 is a main flowchart of a printing process in the printer according to the present invention.
FIG. 3 is a side view of the vicinity of a discharge unit showing a roll paper discharge state in mode 1 in the printer according to the present invention.
FIG. 4 is a side view of the vicinity of a discharge unit showing a roll paper discharge state in mode 2 in the printer according to the present invention.
FIG. 5 is a side view of the vicinity of the discharge unit showing a roll paper discharge state in mode 3 in the printer according to the present invention.
FIG. 6 is a flowchart of print processing in mode 1;
FIG. 7 is a flowchart of print processing in mode 2;
FIG. 8 is a flowchart of print processing in mode 3.
[Explanation of symbols]
10 Printer
11 Discharge port
12 Print head
13 Paper cutting mechanism
14 Feed roller
15 First discharge roller
16 Second discharge roller
17 Paper sensor
20 Recovery device
21 Collection route
22 Collection tray
R roll paper
r paper

Claims (9)

A method for controlling a printer having a plurality of types of printing modes with different methods for conveying continuous paper during printing,
(A) a step of discriminating one of the plurality of types of print modes selected and set;
(B) Depending on the determination result of step (a), a mode in which printing is performed by stopping the printed area of the continuous paper on the upstream side of the discharge port of the printer as necessary, or the printed A mode of performing printing in a mode in which printing is performed while conveying an area from the discharge port; and
(C) receiving an instruction to cut the continuous paper and cutting the continuous paper;
A mode for performing printing while stopping the printed region,
The amount of bending of the continuous paper formed by stopping the printed area is detected, and each time the amount of bending becomes a predetermined amount or more, the printed area at that time is discharged and cut to perform the remaining printing. Mode to perform, or
The amount of deflection of the continuous paper formed by stopping the printed area is detected, and each time the amount of deflection exceeds the first predetermined amount, the amount of deflection is a second predetermined amount (however, the first predetermined amount). The printer control method is a mode in which the printed area at that time is discharged and the remaining printing is performed until it becomes equal to or greater than ≧ second predetermined amount).   2. The printer according to claim 1, wherein the determination of the print mode in the step (a) is performed by decoding a command sent to the printer or by determining a switching state of switching means for switching the print mode. Control method.   In a mode in which printing is performed while transporting the printed region, a feeding roller that transports the printed region toward the discharge port and a discharge roller installed near the discharge port are transported between them. 3. The printer control method according to claim 1, wherein the difference is controlled so that a pulling force of a predetermined value or more is not applied to the continuous paper. A printer having a plurality of types of printing modes with different methods for conveying continuous paper during printing,
First conveying means for conveying the printed area of the continuous paper toward a discharge port of a printer;
A second transport means installed in the vicinity of the discharge port, for transporting the printed area from the discharge port;
One of the plurality of printing modes selected and set is determined, and according to the determination result, the transport by the second transport unit is stopped as necessary and the transport by the first transport unit is stopped. Control means for performing printing in a mode for performing printing on the continuous paper without printing, or a mode for performing printing on the continuous paper without stopping the conveyance by the first conveying means and the second conveying means, and ,
A deflection amount detecting means for detecting a deflection amount of the continuous paper formed by stopping the printed region;
In the mode in which the conveyance by the second conveyance unit is stopped as necessary, the printed area at that time is discharged and cut every time the deflection amount detected by the deflection amount detection unit exceeds a predetermined amount. Each time the remaining printing mode or the detected amount of deflection becomes greater than or equal to the first predetermined amount, the amount of deflection is less than or equal to the second predetermined amount (where the first predetermined amount ≧ the second predetermined amount). Until this time, the printer is in a mode in which the printed area at that time is discharged and the remaining printing is performed.   5. The control unit determines the print mode by decoding a command sent to a printer or determining a switching state of a switching unit provided for switching the print mode. Printer.   When the printing is performed in a mode in which the conveyance of the first conveyance unit and the second conveyance unit is not stopped, the control unit conveys the first conveyance unit and the second conveyance unit to each other. The printer according to claim 4 or 5, wherein the difference in speed is controlled so as to be within a range in which a tensile force of a predetermined value or more is not applied to the continuous paper.   7. The printer according to claim 4, further comprising a clutch mechanism that idles the second conveying unit when a tensile force of a predetermined value or more is applied to the continuous paper. The printer according to claim 4, 5, or 6,
The first transport unit includes a feed roller that transports the printed region toward a discharge port,
The second transport means has a discharge roller for transporting the printed area from the discharge port,
The printer, wherein the feed roller and the discharge roller are driven by a step motor, and the ratio of the mutual feed speed is + 10% to -10% of the discharge roller with respect to the feed roller. The printer according to claim 8, wherein
The printer is characterized in that the ratio of the mutual feed speed is 0 to -5% of the discharge roller with respect to the feed roller.

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