JP5927799B2 - Printing device - Google Patents

Description

  The present invention relates to a printing apparatus.

  2. Description of the Related Art Conventionally, an ink jet printer is widely known as a printing apparatus that prints an image or the like on a sheet by attaching discharged ink to the sheet. An ink jet printer ejects ink from a recording head mounted on a carriage that reciprocates along a main scanning direction, and prints on a sheet conveyed along a sub scanning direction.

  In such a printer, the paper may be jammed in the middle of the conveyance path, causing a paper jam (paper jam). When a paper jam occurs, the user needs to remove the printer cover and search for and remove the jammed paper. However, if the paper breaks, not all pieces of paper may be removed. . As a result, the piece of paper that has not been removed may be pushed and deformed by the carriage that moves in the main scanning direction, making it difficult for the user to remove it.

  Therefore, in the printer described in Patent Document 1, the presence or absence of paper remaining on the conveyance path is confirmed using a fixed non-contact sensor dedicated to jam detection. Further, in the printer described in Patent Document 2 below, the presence or absence of paper is confirmed from the driving load of the motor that moves the carriage.

JP 2005-66969 A JP 2010-274442 A

However, when a fixed non-contact sensor detects a paper jam, depending on the state of the paper jam, the paper may be broken and the non-contact sensor may not be able to detect the paper correctly.
In addition, when detecting a paper jam only with a driving load, the paper jam cannot be detected when the reference value of the driving load to be set is low, and when the reference value is high, the paper jam proceeds and the paper is broken. Sometimes it could not be detected.
Therefore, the present invention has been made in view of the above problems, and an object thereof is to avoid erroneous detection of a paper jam.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

[Application Example 1]
The printing apparatus according to this application example is a printing apparatus that prints information on the print medium by reciprocating a carriage having a recording head that ejects liquid onto the print medium, and the print medium is clogged. The first detection unit that detects the print medium based on a physical quantity that changes when the carriage comes into contact with the print medium, and the clogging of the print medium based on the detection result of the first detection unit. And determining that there is a jammed print medium, a first mode having a print medium jam judgment means for notifying jam, and being notified of jam of the print medium by the print medium jam judgment means , After the jammed print medium is removed, the jammed print medium is detected based on the detection result of the residual detection means and the residual detection means. Determine residual body, when it is determined that the remaining print media is present, it comprises a print medium the residual determining means for notifying residual, and the second mode having, a. The residual detection means includes first detection means for detecting the residual print medium based on a physical quantity that changes as the carriage comes into contact with the residual print medium, and the residual detection means provided on the carriage. A second detection unit that detects the print medium in a non-contact manner, and the print medium residual determination unit uses the first detection unit and the second detection unit of the residual detection unit, and It is characterized by determining whether or not a jammed print medium remains.

According to such a configuration, the first mode for determining whether or not the print medium is clogged includes the first detection unit that detects the print medium based on the physical quantity, and the first mode for detecting the print medium based on the physical quantity. The second mode for determining whether or not the jammed print medium remains is provided with the detection means and the second detection means for detecting the print medium in a non-contact manner, thereby avoiding erroneous detection of the print medium and detecting the print medium. Can be improved.

[Application Example 2]
In the printing apparatus according to the application example, the first detection unit in the first mode and the first detection unit in the second mode detect the print medium based on a speed or torque at which the carriage reciprocates. It is preferable to do.

  According to such a configuration, the print medium can be detected by detecting the speed or torque at which the carriage reciprocates.

[Application Example 3]
In the printing apparatus according to the application example, it is preferable that the second detection unit in the second mode detects the print medium based on a reflection amount of irradiated light.

  According to such a configuration, the print medium can be detected by detecting the amount of reflected light.

[Application Example 4 ]
In the printing apparatus according to the application example, the second mode printing medium remaining determination unit is configured such that at least one of the second mode first detection unit and the second mode second detection unit is the print medium. When it is detected, it is preferable to determine that the print medium remains .
According to such a configuration, since at least one of the first detection unit and the second detection unit detects the print medium when the print medium is detected, the print medium remaining can be quickly determined.

[Application Example 5 ]
In the printing apparatus according to the application example, if the print medium remaining determination unit in the second mode detects the print medium when both the first detection unit and the second detection unit detect the print medium, It is preferable to determine that there is a residue.

  According to such a configuration, when both the first detection unit and the second detection unit detect the print medium, the print medium remaining is determined, so that the print medium remaining can be reliably determined.

[Application Example 6 ]
In the printing apparatus according to the application example, when the second detection unit detects the print medium , the second mode has a determination criterion for determining that the first detection unit has detected the print medium. When the first detection unit detects the print medium according to the determination criterion, it is preferable to determine that the print medium remains.

  According to such a configuration, it is possible to improve the determination accuracy for determining the remaining print medium.

FIG. FIG. The figure which shows the structure of the control part of a printer. 6 is a flowchart showing a flow of paper jam recovery processing. 3 is a flowchart showing a flow of processing for confirming remaining paper pieces in the first embodiment. 9 is a flowchart showing a flow of processing for confirming a remaining piece of paper in the second embodiment. The figure explaining the reference value of a duty.

  Hereinafter, the printing apparatus will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a perspective view of an ink jet printing apparatus (hereinafter referred to as a printer 11) with an outer case removed. FIG. 2 is a schematic sectional view of the printer 11.
The printer 11 includes a main body case 12 having a substantially square box shape whose upper side is open. A carriage 14 serving as a recording unit reciprocates along a main scanning direction X on a guide shaft 13 installed in the main body case 12. It is provided in a possible state.
An endless timing belt 15 to which the carriage 14 is fixed on the back side is wound around a pair of pulleys 16 and 17 disposed on the inner surface of the back plate of the main body case 12, and one pulley 16 and the drive shaft are connected. The carriage 14 is configured to reciprocate in the main scanning direction X by forward / reversely driving a carriage motor (hereinafter referred to as “CR motor 18”) as the driving means.

  A recording head 19 that ejects liquid ink is provided below the carriage 14. Further, in the lower position facing the recording head 19 in the main body case 12, the recording head 19 and a sheet P as a printing medium are provided. The platen 20 defining the interval is arranged in a state extending in the X direction. Further, a PW (Paper Width) detector 46 that detects the left and right ends of the paper P is disposed adjacent to the recording head 19. In addition, on the carriage 14, black and color ink cartridges 21 and 22 are detachably loaded. The recording head 19 ejects (discharges) ink of each color supplied from the ink cartridges 21 and 22 from nozzles for each color.

  On the back side of the printer 11, only the uppermost sheet among the paper feed tray 23 and the many sheets P stacked on the paper feed tray 23 is separated and the sub-scanning direction Y (upstream in the transport direction) is separated. An automatic sheet feeder 24 is provided for feeding in the direction from the side toward the downstream side.

A paper feed motor (hereinafter referred to as “PF motor 25”) is disposed at the lower right side of the main body case 12 in FIG. As shown in FIG. 2, the paper P is supplied from the paper feed tray 23 to the lower portion of the recording head 19 by the paper feed roller 33, and then transported in the sub-scanning direction Y by the transport roller 31 and the paper discharge roller 32. The paper feed roller 33, the transport roller 31 and the paper discharge roller 32 are driven by the PF motor 25 via a gear mechanism (not shown).
In the printer 11, a printing operation for ejecting ink from the nozzles of the recording head 19 toward the paper P while reciprocating the carriage 14 in the main scanning direction X, and a predetermined transport amount of the paper P in the sub-scanning direction Y are performed. By repeating the paper feeding operation transported in (1) substantially alternately (however, each operation timing partially overlaps), printing of characters, images, and the like is performed on the paper P.

Further, a linear encoder 26 that outputs a number of pulses proportional to the moving distance of the carriage 14 is installed in the printer 11 so as to extend along the guide shaft 13, and is obtained using the output pulse of the linear encoder 26. Based on the movement position, movement direction, and movement speed of the carriage 14 in the main scanning direction X, speed control and position control of the carriage 14 are performed. A maintenance device 28 that performs a cleaning operation for preventing or eliminating nozzle clogging or the like of the recording head 19 is arranged immediately below the carriage 14 when the carriage 14 is positioned at a predetermined position (home position) in the printer 11. It is installed.
In the first embodiment, the home position is a printing area on the carriage movement path, that is, one end outside the recording area where the recording head 19 performs recording by ejecting ink onto the paper P. .
Further, a waste liquid tank 29 is disposed below the platen 20 in which the ink sucked from the nozzles of the recording head 19 by the maintenance device 28 is discarded.

  The PW detector 46 includes a light emitting element that emits light toward the paper P using the LED, and a light receiving element that receives the reflected light reflected by the paper and outputs a voltage corresponding to the light quantity. It is. The PW detector 46 moves in the main scanning direction together with the carriage 14, and the light emitted from the light emitting element strikes and reflects the detection target paper or the platen 20, and the reflected light is received by the light receiving element and the received light amount is obtained. It is a reflection type photo interrupter whose output voltage changes in response.

FIG. 3 is a diagram illustrating a configuration of the control unit 100 that controls driving of the CR motor 18 and the PF motor 25.
The control unit 100 includes a ROM 101, a RAM 102, an ASIC (application specific integrated circuit) 103, an MPU 104, a nonvolatile memory 105 as a “nonvolatile storage medium”, a PF motor driver 106, a CR motor driver 107, and a head driver 108. Yes.
The MPU 104 receives the output signals of the linear encoder 26 that detects the amount of movement of the carriage 14 and the PW detector 46 that detects the end of the paper P in the main scanning direction X via the ASIC 103.

A ROM 101, a RAM 102, an ASIC 103, an MPU 104, and a nonvolatile memory 105 are connected to the system bus of the control unit 100.
The MPU 104 performs arithmetic processing for executing recording control of the printer 11 and other necessary arithmetic processing. The ROM 101 stores a recording control program (firmware) necessary for controlling the printer 11 by the MPU 104, and various data necessary for processing the recording control program is stored in the nonvolatile memory 105. The RAM 102 is used as a work area for the MPU 104 and a storage area for recording data.

The ASIC 103 has a control circuit for performing speed control of the PF motor 25 and the CR motor 18 which are DC motors, and driving control of the recording head 19. That is, the ASIC 103 performs various calculations for controlling the speed of the PF motor 25 and the CR motor 18 based on the control command sent from the MPU 104 and the output signal of the linear encoder 26, and the motor based on the calculation result. A control signal is sent to the PF motor driver 106 and the CR motor driver 107.
The ASIC 103 calculates and generates a control signal for the recording head 19 based on the recording data sent from the MPU 104 and sends it to the head driver 108 to control the driving of the recording head 19. The ASIC 103 has a host IF 112 that realizes information transmission with a personal computer (PC) 301 as an information processing apparatus.

  By the way, if the paper P causes a paper jam (paper jam) during the printing process of the printer 11 described above, the paper P enters the moving range of the carriage 14 and the recording head 19, and the main scanning direction X is accompanied by the printing operation. May come into contact with the carriage 14 or the recording head 19 that reciprocates along the head. As a result, the movement of the carriage 14 is hindered by the paper P, and the driving load of the CR motor 18 increases.

  The CR motor 18 performs control to move the carriage 14 at a constant speed, but when the driving load of the carriage 14 increases, the movement speed of the carriage 14 as a physical quantity decreases. Here, the control unit 100 detects a decrease in moving speed from the output signal of the linear encoder 26 <first mode>, and determines that a paper jam has occurred when the moving speed falls below a predetermined moving speed.

FIG. 4 is a flowchart showing the flow of the paper jam recovery process <second mode> executed when the control unit 100 determines the occurrence of paper jam while the carriage 14 is printing along the main scanning direction X.
When this process is started, the control unit 100 moves the carriage 14 in the other direction and retracts it to the home position (step S200).
Next, the control unit 100 notifies the user of the occurrence of a paper jam and requests removal of a piece of paper in the vicinity of the reciprocating region of the carriage 14 (step S202). In the first embodiment, the notification destination to the user is assumed to be a display panel installed in the printer 11 or a display screen of the PC 301 to which the printer 11 is connected.
The user visually recognizes the displayed notification, removes the piece of paper, and presses a confirmation button displayed together with the notification.

The control unit 100 confirms that the confirmation button has been pressed (step S204), and waits until it is pressed (No in step S204).
When the control unit 100 confirms that the confirmation button has been pressed (Yes in step S204), the control unit 100 instructs the carriage 14 to start moving in the main scanning direction (step S206). In accordance with this instruction, the carriage 14 starts moving again from the home position in the main scanning direction at a predetermined speed.

Next, the control unit 100 confirms the remaining piece of paper within the moving range of the carriage 14 from the duty value and the output of the PW detector 46 (step S210). In the first embodiment, the processing shown in FIG. 5 is executed.
That is, first, the control unit 100 acquires a duty value as a physical quantity (step S230). The duty value is calculated by the control unit 100 based on a duty signal obtained from the CR motor driver 107.
Subsequently, the control unit 100 determines whether or not the acquired duty value exceeds a predetermined determination criterion (reference value) (step S232) <first detection unit>.

As is well known, when a brushed DC motor is used, its torque / rotational speed characteristic is proportional to the duty value. Therefore, when the duty value exceeds the reference value, it can be determined that the driving load of the CR motor 18 has increased due to the remaining paper piece.
Therefore, when it is determined that the duty value exceeds the reference value (Yes in step S232), the control unit 100 determines that a piece of paper remains (step S240) and returns to step S210 in FIG.

On the other hand, when it is determined that the duty value does not exceed the reference value (No in step S232), the control unit 100 acquires the position information of the carriage 14 from the linear encoder 26, and the current position is determined by the PW detector 46. It is determined whether there is a possibility of erroneous detection (step S233).
Here, the erroneous detection means that the PW detector 46 determines that the platen 20 is the paper P based on the shape of the platen 20 included in the detection area of the PW detector 46. Information on a region that may be erroneously detected may be determined in the design stage and stored in the nonvolatile memory 105, or may be determined by a measurement operation by the PW detector 46 and stored in the nonvolatile memory 105. May be. It is also possible to assume a state in which the possibility of erroneous detection is not determined.
If it is determined in step S233 that the current position may be erroneously detected (Yes in step S233), the process proceeds to step S238. If it is determined that there is no possibility of erroneous detection of the current position (No in step S233), the control unit 100 acquires the output of the PW detector 46 (step S234).

Subsequently, the control unit 100 determines whether or not the PW detector 46 has detected paper from the output value (step S236) <second detection means>.
If the PW detector 46 determines that paper has been detected (Yes in step S236), the control unit 100 determines that a piece of paper remains (step S240) <determination means>, step S210 in FIG. Return to.
On the other hand, when the PW detector 46 determines that no paper is detected (No in step S236), the control unit 100 determines that no piece of paper remains (step S238) and returns to step S210 in FIG.

  In the first embodiment, in order to facilitate understanding of the processing flow, the determination is first made by the duty value and then by the output of the PW detector 46. However, the order is not limited, and the determination is made. The order may be reversed. In addition, when the thread that is determined by the duty value and the thread that is determined by the output of the PW detector 46 are executed independently and the duty value exceeds the reference value or the PW detector 46 detects a piece of paper, A mode of interrupting step S210 may be adopted.

Returning to FIG. 4, when the control unit 100 determines that a piece of paper remains (Yes in step S212), the control unit 100 instructs the carriage 14 to stop moving (step S216).
Subsequently, the control unit 100 retracts the carriage 14 to the home position (step S218).
Next, the control unit 100 notifies the user of the remaining paper jam and requests paper piece removal (step S220). In the first embodiment, notification is given to a display panel installed in the printer 11 or a display screen of the PC 301 to which the printer 11 is connected.
On the other hand, the user visually recognizes the displayed notification, searches for and removes the piece of paper, and presses a confirmation button displayed together with the notification.

The control unit 100 confirms that the confirmation button is pressed (step S222), and waits until it is pressed (No in step S222).
When the control unit 100 confirms that the confirmation button has been pressed (Yes in step S222), that is, when the signal indicating that the user has removed the paper P is output by pressing the confirmation button, the control unit 100 notifies the remaining notification. Whether or not has been repeated a predetermined number of times is determined (step S224).
Here, when the control unit 100 determines that the remaining notification has not been repeated a predetermined number of times (No in step S224), the process returns to step S206 to confirm the removal of the paper P again.
On the other hand, when the control unit 100 determines that the remaining notification has been repeated a predetermined number of times (Yes in step S224), the series of processing ends. In this case, information indicating abnormal termination may be used as a return value.

In step S212, when the control unit 100 does not determine the remaining paper piece (No in step S212), the control unit 100 determines whether the carriage 14 moving in the main scanning direction has moved to the end. (Step S214).
Here, if it is determined that the carriage 14 has not moved to the end (No in step S214), the process returns to step S210 to check the remaining paper pieces.
On the other hand, if it is determined that the carriage 14 has moved to the end (Yes in step S214), the series of processes is terminated. In this case, information indicating normal termination may be used as a return value.
The first detection unit, the second detection unit, and the determination unit realize each function by the cooperation of the hardware described above and the program stored in the ROM 101 or the nonvolatile memory 105.

In the first embodiment described above, when a piece of paper that has caused a paper jam remains above the platen 20 and abuts against the side surface of the carriage 14 in the moving direction, the duty value first exceeds the reference value. In the duty value determination process (step S232), the remaining piece of paper is determined.
On the other hand, when the paper jammed paper remains in a low state along the platen 20 and does not come into contact with the carriage 14 or the recording head 19, the duty value does not change and the output value of the PW detector 46 does not change. Since the reference value is exceeded, the remaining piece of paper is determined by the determination process by the PW detector 46 (step S236).

Thus, since it can be detected by any method according to the state of the remaining paper piece, the remaining paper piece can be detected quickly, and the movement of the carriage 14 can be stopped quickly. As a result, the carriage 14 can continue to move in contact with the paper pieces, and the remaining paper pieces can be prevented from tearing and adhering to the central portion of the carriage 14 or being caught around the carriage 14. It is possible to reduce the labor and cost required for maintenance for removing the piece of paper.
Further, in an area where the PW detector 46 may determine that the platen 20 is the paper P due to the shape of the platen 20 or the like, the detection by the PW detector 46 is not performed, and the remaining paper piece is determined only by the duty value. Therefore, false detection can be avoided.

(Embodiment 2)
Next, Embodiment 2 of the present invention will be described with reference to FIG. 6 and FIG. In the following description, the same parts as those already described are denoted by the same reference numerals and description thereof is omitted.
In the first embodiment, it is determined that the duty value exceeds the reference value or the paper piece remains when the PW detector 46 detects the paper piece. However, in the second embodiment, the PW detector 46 is the paper piece. And the duty value exceeds the reference value, it is determined that a piece of paper remains.

FIG. 6 is a flowchart showing the flow of processing in step S210 in the second embodiment. FIG. 7 is a diagram illustrating a change in the reference value of the duty due to a difference in presence / absence of an erroneous detection region.
In the second embodiment, first, the control unit 100 acquires the output of the PW detector 46 (step S250).

Subsequently, the control unit 100 determines whether or not the PW detector 46 has detected paper from the acquired output (step S252).
If the PW detector 46 determines that no paper is detected (No in step S252), it is determined that no paper piece remains (step S264), and the process returns to step S210 in FIG.
On the other hand, when it is determined that the PW detector 46 has detected paper (Yes in step S252), the control unit 100 acquires the position information of the carriage 14 from the linear encoder 26, and the current position is determined by the PW detector 46. It is determined whether there is a possibility of erroneous detection (step S254).

Here, when it is determined that there is no possibility of erroneous detection of the current position (No in step S254), the control unit 100 lowers the reference value of the duty as shown in FIG. That is, the control unit 100 lowers from D1 to D2 (step S256), and proceeds to step S258.
In the second embodiment, it is assumed that the duty reference values (D1, D2) are determined in advance and stored in the non-volatile memory 105. The coefficient to be multiplied may be changed according to the output of the PW detector 46. Also, the duty reference value may be uniquely changed according to the output of the PW detector 46.

On the other hand, if it is determined that the current position may be erroneously detected (Yes in step S254), the control unit 100 proceeds to step S258 without reducing the reference value (D1) of the duty.
In step S258, the control unit 100 acquires a duty value. Subsequently, the control unit 100 determines whether or not the acquired duty value exceeds the reference value (step S260).

If it is determined that the duty value exceeds the reference value (Yes in step S260), the control unit 100 determines that a piece of paper remains (step S262) and returns to step S210 in FIG.
On the other hand, if it is determined that the duty value does not exceed the reference value (No in step S260), it is determined that no piece of paper remains (step S264), and the process returns to step S210 in FIG.
By the above processing, when there is no erroneous detection area as shown in FIG. 7, the output of the PW detector 46 exceeds the reference value P1 at the main scanning position XS to detect a piece of paper, so that the duty reference value is from D1. Go down to D2. As a result, since the duty value exceeds D2 at the main scanning position X1, the control unit 100 can determine the remaining piece of paper. If the duty value does not exceed D2, the PW detector 46 does not detect a piece of paper at the main scanning position XE, so the duty reference value returns from D2 to D1.

In the second embodiment described above, when the PW detector 46 exceeds the reference value P1, the duty reference value is lowered from D1 to D2, and the remaining of the paper piece is determined by both the output of the PW detector 46 and the duty value. Therefore, it is possible to determine the remaining of the paper piece at an early stage and avoid the tearing of the paper piece due to the movement of the carriage 14. Further, even when the PW detector 46 detects dust or adhering matter other than the paper piece, if the duty value does not exceed the reference value, it is not determined as the paper piece, so that erroneous detection of the paper piece can be avoided.
Further, as shown in FIG. 7, when a piece of paper remains in an erroneous detection area caused by the shape of the platen 20, dust or oil attached to the platen, etc., the PW detector 46 erroneously detects the piece of paper in the erroneous detection area. Even if the output exceeds the reference value P1, the reference value of the duty is maintained at D1. When the carriage 14 moves to the vicinity of the paper piece, the duty value exceeds the reference value D1 at the main scanning position X2, so the control unit 100 determines the remaining paper piece.
In this way, even when the PW detector 46 exceeds the reference value P1, the duty reference value is maintained at D1 without being relaxed, so that erroneous detection is avoided and the remaining of the paper piece is reliably determined. it can.

  Moreover, the apparatus which implements the above methods may be realized by a single apparatus or may be realized by combining a plurality of apparatuses, and includes various aspects.

  DESCRIPTION OF SYMBOLS 11 ... Printer, 12 ... Main body case, 13 ... Guide shaft, 14 ... Carriage, 15 ... Timing belt, 16, 17 ... Pulley, 18 ... CR motor, 19 ... Recording head, 20 ... Platen, 21, 22 ... Ink cartridge, DESCRIPTION OF SYMBOLS 23 ... Paper feed tray, 24 ... Automatic paper feeder, 25 ... PF motor, 26 ... Linear encoder, 28 ... Maintenance device, 29 ... Waste tank, 31 ... Conveyance roller, 32 ... Paper discharge roller, 33 ... Paper feed roller, 46 ... PW detector, 100 ... control unit, 101 ... ROM, 102 ... RAM, 103 ... ASIC, 104 ... MPU, 105 ... nonvolatile memory, 106 ... PF motor driver, 107 ... CR motor driver, 108 ... head driver, 112: Host IF, 301: PC, P: Paper.

Claims (6)

A printing apparatus that prints information on the print medium by reciprocating a carriage mounted with a recording head that ejects liquid onto the print medium,
First detection means for detecting the print medium based on a physical quantity that changes when the carriage comes into contact with the print medium due to occurrence of clogging of the print medium, and based on a detection result of the first detection means. Determining a jam of the print medium, and when determining that the jammed print medium is present, a first mode having a print medium jam determination means for notifying the jam,
After the print medium jam judging means is notified of the jam of the print medium and the jammed print medium is removed, a residual detection means for detecting whether the jammed print medium remains, and detection of the residual detection means A second mode having a print medium remaining determining means for determining the remaining of the jammed print medium based on the result, and notifying the remaining when the remaining print medium is determined to be present,
The residual detection means includes first detection means for detecting the residual print medium based on a physical quantity that changes as the carriage comes into contact with the residual print medium, and the residual print medium provided on the carriage. And second detection means for detecting the contactlessly,
The printing apparatus is characterized in that the printing medium residual determination unit determines whether or not the jammed printing medium remains using the first detection unit and the second detection unit of the residual detection unit. The printing apparatus according to claim 1,
The printing apparatus, wherein the first detection unit in the first mode and the first detection unit in the second mode detect the print medium based on a speed or torque at which the carriage reciprocates. The printing apparatus according to claim 1,
The second detection unit in the second mode detects the print medium based on a reflection amount of irradiated light. The printing apparatus according to any one of claims 1 to 3,
The print medium remaining determination unit in the second mode is configured to detect the print medium when at least one of the first detection unit in the second mode and the second detection unit in the second mode detects the print medium. A printing apparatus characterized by determining that there is a residue. The printing apparatus according to any one of claims 1 to 3,
The print medium remaining determining means in the second mode determines that the print medium remains when both the first detecting means and the second detecting means detect the print medium. A printing device. The printing apparatus according to claim 5, wherein
In the second mode, when the second detection unit detects the print medium,
If the first detection unit lowers the determination criterion for determining that the print medium is detected, and the first detection unit detects the print medium based on the determination criterion, it is determined that the print medium remains. The printing apparatus characterized by performing.

Images