JP7280589B2 - Cutter device and printer using the same - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter device mounted in a ticket issuing device for issuing receipts, tickets, etc., for cutting continuous paper such as roll paper, and more particularly to a cutter device having a partial cut function for cutting while leaving a part of the paper. . The invention also relates to a printer equipped with such a cutter device.

A ticketing device for issuing receipts, tickets, etc. is known. The ticket issuing device includes a printer, prints on continuous paper such as roll paper, cuts the printed portion with a cutter, and issues receipts and tickets.

As one of the cutter devices built into printers, there is known a method in which a movable blade is arranged to move back and forth relative to a fixed blade, and paper is cut while the movable blade slides against the fixed blade under pressure. References 1-3). The cutting edge of the movable blade is formed in a substantially V-shape, and a non-cutting slit is provided at the lower end of the V-shaped cutting edge to enable partial cutting (leaving one point at the center). A full cut or a partial cut can be selected by changing the stop position of the movable blade. In other words, the paper can be fully cut by moving the slit of the movable blade farther than the tip of the fixed blade, and the slit of the movable blade is positioned in front of the tip of the fixed blade (partial cut position). By stopping, the paper can be partially cut.

Controlling the stroke amount of the movable blade is very important in partial cutting, because variations in the stroke amount of the movable blade cause an increase in the width of the non-cut portion of the paper and an unintended full cut. As a method for controlling the stroke amount of the movable blade, for example, Patent Document 4 discloses a cutter position sensor for detecting the full-cut and partial-cut positions of the movable blade in a printer cutting mechanism having both full-cut and partial-cut functions. is provided, and the stop position of the movable blade is controlled based on the signal output from the cutter position sensor. According to this method, it is possible to change the cutting depth of the partial cut by changing the position of the cutter position sensor.

Patent Document 5 describes a printer with a cutter provided with a home position sensor that detects the initial position of a movable blade. Since this home position sensor also serves as a platen unit detection sensor, there is no need to separately prepare a sensor for detecting the set state of the platen roller, and cost can be reduced.

Patent Document 6 has a function of measuring the time required for the movable blade to make one reciprocation between the cutting position and the open position, and determining that it is time to clean the fixed blade and the movable blade when the measured time exceeds a threshold value. printer is listed.

JP-A-2008-68340 Japanese Utility Model Publication No. 7-11907 JP-A-11-33976 Japanese Patent Application Laid-Open No. 2003-127483 JP 2013-095045 A JP 2018-183906 A

If a plurality of cutter position sensors are provided as in Patent Document 4, the number of sensors should be as small as possible. As the cutter position sensor, as described in Patent Document 5, it is preferable to provide a sensor (home position sensor) for detecting that the movable blade has returned to the retracted position from the viewpoint of safety. It is preferable to control the partial cut stroke amount of the movable blade based on the output of the position sensor.

However, if the home position of the movable blade detected by the home position sensor varies, the partial cut position of the movable blade will vary even if the movable blade is accurately moved by a constant stroke amount. It develops into a problem. There are various factors that cause the output of the home position sensor to vary.In addition to the initial factors such as the accuracy of various components, the mounting position of the sensor, and the variation in the operating position of the home position sensor switch itself, the increase in the number of cutting operations It also occurs due to changes over time (wear of parts) and the like.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a cutter device capable of maintaining a constant stop position of a movable blade during partial cutting even if there is variation in the output of a home position sensor, and a printer using the same. be.

In order to solve the above-mentioned problems, a cutter device according to the present invention includes a fixed blade, a movable blade provided to move forward and backward toward the fixed blade, a movable blade drive mechanism for driving the movable blade in the forward and backward directions, and the A home position sensor that detects that the movable blade is moving near the home position, which is the most retracted position as viewed from the fixed blade, and a control that controls the movable blade drive mechanism based on the output of the home position sensor. wherein the control unit measures in advance the switching position of the home position sensor in the advancing/retreating direction of the movable blade, and determines the partial cut standard of the movable blade based on the measured value of the switching position of the home position sensor. The stroke amount is corrected, and the paper is partially cut by feeding the movable blade with the corrected partial cut stroke amount.

According to the present invention, the stop position of the movable blade during partial cutting can be kept constant even if the output of the home position sensor varies.

The control unit obtains a difference between the standard value and the measured value of the switching position of the home position sensor as a correction amount for the partial cut standard stroke amount, and subtracts the difference from the partial cut standard stroke amount to obtain the partial cut standard stroke amount. It is preferable to correct the cut standard stroke amount. Thereby, the partial cut position of the movable blade can be kept constant.

The movable blade drive mechanism includes a stepping motor, and the control unit rotates the stepping motor forward to feed the movable blade to a partial cut position, and then rotates the stepping motor in the reverse direction to move the movable blade to the above position. It is preferable to return to the home position. Thereby, the stroke amount of the movable blade can be accurately controlled.

The controller controls the stepping motor from the half value of the number of steps of the stepping motor corresponding to the ON region of the home position sensor while the movable blade makes one reciprocation in the advancing/retreating direction, from the home position to the switching position of the home position sensor. It is preferable to obtain the number of steps of the stepping motor required for moving the movable blade. This makes it possible to easily obtain the corrected partial cut stroke amount.

The movable blade drive mechanism includes a rotary blade drive gear that is rotationally driven by the stepping motor, and is a crank mechanism that converts rotary motion of the rotary blade drive gear into reciprocating motion of the movable blade, and the movable blade is It is preferable that the paper is fully cut by reciprocating once in the advancing/retreating direction when the movable blade driving gear rotates once. As a result, it is possible to realize a cutter device that has both a full-cut function and a partial-cut function for paper.

Further, a printer according to the present invention has the features of the present invention described above, including a paper feed mechanism for feeding paper onto a paper transport path, and a printing section for printing on the paper fed to the paper transport path by the paper feed mechanism. It is characterized by comprising a cutter device for cutting the cut paper.

According to the present invention, it is possible to provide a printer that uses a cutter device that can keep the stop position of the movable blade constant during partial cutting even if there is variation in the output of the home position sensor.

The printer according to the present invention further includes a power supply unit that supplies power to the paper feeding mechanism, the printing unit, and the cutter device, and the control unit measures a correction amount for the partial cut standard stroke amount of the movable blade when the power is turned on. Action is preferred. According to the present invention, the initialization operation of the cutter device can be performed at appropriate timing.

According to the present invention, it is possible to provide a cutter device capable of maintaining a constant stop position of the movable blade during partial cutting even if there is variation in the output of the home position sensor, and a printer using the same.

FIG. 1 is a side view schematically showing the configuration of a printer according to an embodiment of the invention. FIG. 2 is a plan view schematically showing the configuration of the cutter device 10 according to the embodiment of the invention. 3(a) and 3(b) are diagrams for explaining the operation of the movable blade 12, where (a) shows a full cut mode and (b) shows a partial cut mode, respectively. 4A and 4B are schematic plan views for explaining the configuration and operation of the home position sensor. indicates the ON state. FIG. 5 is a graph for explaining the relationship between the rotation angles of the movable blade drive gears 16A and 16B, the position of the movable blade 12 in the advancing/retreating direction, and the ON/OFF state of the home position sensor 20. FIG. FIGS. 6A and 6B are diagrams schematically showing the relationship between the ON/OFF state of the home position sensor and the number of steps of the stepping motor. b) shows the case where there is an error in the home position sensor. FIG. 7 is a flow chart for explaining the initialization operation of the cutter device. FIG. 8 is a flowchart for explaining the partial cut operation.

Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 is a side view schematically showing the configuration of a printer according to an embodiment of the invention.

As shown in FIG. 1, the printer 1 includes a housing 2 provided with a roll paper storage section, a printing section including a print head 4, a paper feeding mechanism including a platen roller 5, a fixed blade 11 and a movable blade 12. It has a cutter device 10 for cutting printed paper, a control section 7 for controlling each section, and a power supply section 8 for supplying power to each section. The paper 3P continuously drawn out from the roll paper 3R accommodated in the housing 2 is printed by the print head 4 and the platen roller 5, cut by the cutter device 10, and discharged from the ticket issuing port 2a. . The control unit 7 controls the printing operation of the print head 4, the rotating operation of the platen roller 5, and the cutting operation of the cutter device 10 according to a printing request from the outside. The platen roller 5 and cutter device 10 are driven by a motor (not shown). Although the details will be described later, the control unit 7 initializes the cutter device 10 when the power of the printer 1 is turned on, for example.

FIG. 2 is a plan view schematically showing the configuration of the cutter device 10 according to the embodiment of the invention.

As shown in FIG. 2, the cutter device 10 according to this embodiment includes a fixed blade 11 fixed at a predetermined position near the paper transport path 6, and a fixed blade 11 facing the fixed blade 11 with the paper transport path 6 interposed therebetween. A movable blade 12 provided to move back and forth toward a fixed blade 11, a movable blade driving mechanism 13 for driving the movable blade 12 in the forward and backward direction, and whether or not the movable blade 12 has returned to its retracted home position. and a home position sensor 20 for detecting. As described above, the forward/backward motion of the movable blade 12 is controlled by the controller 7 .

The movable blade 12 cuts the paper 3P (see FIG. 1) passing through the paper transport path 6 between the fixed blade 11 and the movable blade 12 by moving forward toward the fixed blade 11 . While the fixed blade 11 has a straight blade edge, the movable blade 12 has a substantially V-shaped blade edge extending in the advancing and retreating direction. By making the shape of the cutting edge of the movable blade 12 substantially V-shaped, the cutting edge of the movable blade 12 can be obliquely inserted into the fixed blade 11, and the paper can be efficiently cut by the scissors effect.

The rear end of the movable blade 12 is fixed to a movable blade holding member 14 made of resin. The blade edge of the movable blade 12 is pressed against the stationary blade 11 by a movable blade pressing member (not shown). disconnect. Guide pieces 12b protruding forward from the cutting edge are provided at the front ends of both ends in the width direction of the movable blade 12, and as shown in the figure, the movable blade 12 is fixed even when it is moved to the rearmost home position. It is configured so that the movable blade 12 is kept in pressure contact with the blade 11 .

A non-cutting slit 12a is provided on the farthest side (center in the width direction) of the V-shaped cutting edge of the movable blade 12 when viewed from the fixed blade 11 side. Although only one slit 12a is provided in this embodiment, it is also possible to provide two or more slits. When the cutting edge of the movable blade 12 advances toward the fixed blade 11 and the slit 12a completely passes through the position of the cutting edge of the fixed blade 11, the paper is fully cut. On the other hand, when the slit 12a of the movable blade 12 stops just before the blade edge of the fixed blade 11 (partial cut position), the paper is partially cut and partially connected at the position of the slit 12a.

The movable blade driving mechanism 13 has a stepping motor 15 and first and second movable blade driving gears 16A and 16B rotationally driven by the stepping motor 15. As shown in FIG. A pinion gear 15a provided on the rotary shaft of the stepping motor 15 meshes with the second movable blade drive gear 16B through reduction gears 18a and 18b, and the second movable blade drive gear 16B is engaged with the first movable blade drive gear. It meshes with 16A. Therefore, the first movable blade drive gear 16A rotates in the opposite direction to the second movable blade drive gear 16B. The movable blade drive mechanism 13 constitutes a crank mechanism that converts the rotary motion of the rotary blade drive gears 16A and 16B into the reciprocating motion of the movable blade 12. As shown in FIG.

First and second crankpins 17A and 17B are implanted in the main surfaces of the first and second movable blade drive gears 16A and 16B, respectively, and the pair of crankpins 17A and 17B are movable blade holding members. 14 are inserted into a pair of drive grooves 14a, 14a formed in the groove 14, respectively. The pair of drive grooves 14a, 14a are elongated holes formed linearly along the width direction orthogonal to the advancing/retreating direction of the movable blade 12. As shown in FIG. When the stepping motor 15 drives the first and second movable blade drive gears 16A and 16B to rotate, the crankpins 17A and 17B rotate and change their positions in the X and Y directions.

Here, the second crankpin 17B rotates in a direction opposite to that of the first crankpin 17A, but the positions of the first and second crankpins 17A and 17B in the advancing/retreating direction (Y direction) of the movable blade 12 are different from each other. configured to match. Therefore, when the first crankpin 17A moves forwardmost in the Y direction, the second crankpin 17B also moves forwardmost in the Y direction. Further, when the first crankpin 17B moves to the rearmost position in the Y direction, the second crankpin 17B also moves to the rearmost position in the Y direction. Furthermore, when the first crankpin 17A moves to the leftmost side (outer side), the second crankpin 17B moves to the rightmost side (outer side), and conversely, the first crankpin 17A moves to the rightmost side (center side). , the second crankpin 17B moves to the leftmost side (center side).

Since the change in the position of the crankpins 17A, 17B in the X direction coincides with the formation direction of the drive grooves 14a, 14a, the crankpins 17A, 17B can move freely within the drive grooves 14a, 14a. The blade holding member 14 does not receive force in the X direction from the crankpins 17A and 17B. On the other hand, since the change in the position of the crankpins 17A, 17B in the Y direction is perpendicular to the formation direction of the drive grooves 14aA, 14a, the movable blade holding member 14 engaged with the crankpins 17A, 17B It receives forces from 17A and 17B and moves in the Y direction. That is, the movable blade 12 advances and retreats in the Y direction together with the movable blade holding member 14 . When the first and second movable blade drive gears 16A and 16B rotate once, the movable blade 12 can perform one reciprocating motion together with the movable blade holding member 14, and the first and second movable blade drive gears Reciprocating motion can be repeated when 16A and 16B rotate continuously.

3(a) and 3(b) are diagrams for explaining the operation of the movable blade 12, where (a) shows a full cut mode and (b) shows a partial cut mode, respectively.

As shown in FIG. 3A, when the paper is to be fully cut, the slit 12a of the movable blade 12 is forwarded beyond the position of the cutting edge of the fixed blade 11 to cut the paper. The forward/backward movement of the movable blade 12 in the full cut mode can be realized simply by rotating the first and second movable blade drive gears 16A and 16B once. Alternatively, the first and second movable blade drive gears 16A and 16B may be rotated forward by 180° and then rotated backward to return to the original position (home position). When the crankpins 17A and 17B come closest to the fixed blade 11, the slit 12a of the movable blade 12 completely passes the position of the blade edge of the fixed blade 11 and is fed further forward, so that the paper can be fully cut. .

On the other hand, as shown in FIG. 3B, when partially cutting the paper, the movable blade 12 is moved forward so that the slit 12a of the movable blade 12 stops just before the cutting edge of the fixed blade 11 (partial cut position). Let Thereafter, the first and second movable blade driving gears 16A and 16B are rotated in reverse to return the movable blade 12 to its original position (home position). As described above, the paper can be partially cut.

4A and 4B are schematic plan views for explaining the configuration and operation of the home position sensor 20. FIG. 4A is a state in which the home position sensor 20 is off, and FIG. The sensor 20 is shown in each of the ON states.

As described above, the home position sensor 20 is a sensor that detects that the movable blade 12 has returned to the vicinity of the home position. The home position of the movable blade 12 is the position where the movable blade 12 is most retracted when viewed from the fixed blade 11 . Although the home position sensor 20 according to this embodiment is a mechanical switch, it is also possible to use an optical switch.

As shown in FIG. 4(a), when the movable blade 12 is moving forward from the home position, the rear end of the movable blade holding member 14 does not press the lever switch 20a of the home position sensor 20, so the home position is maintained. Sensor 20 is in the off state. Therefore, the controller 7 can detect that the movable blade 12 has not returned to the vicinity of the home position.

On the other hand, as shown in FIG. 4(b), when the movable blade 12 is retreating and returning to the home position, the lever switch 20a of the home position sensor 20 is pushed by the rear end portion of the movable blade holding member 14 and turned on. , the controller 7 can detect that the movable blade 12 has returned to the vicinity of the home position.

In partial cutting of paper, it is necessary to accurately control the stroke amount of the movable blade 12 to the cutting edge of the fixed blade 11, and for this purpose, it is necessary to accurately grasp the position of the movable blade 12. The stroke amount of the movable blade 12 up to the partial cut position is controlled based on the number of steps of the stepping motor 15 .

FIG. 5 is a graph for explaining the relationship between the rotation angles of the movable blade drive gears 16A and 16B, the position of the movable blade 12 in the advancing/retreating direction (movable blade stroke amount), and the ON/OFF state of the home position sensor 20. FIG.

As shown in FIG. 5, the rotation angle of the movable blade drive gears 16A and 16B at the position (home position) where the movable blade 12 is most retracted is set as a reference angle (0°), and the movable blade drive gears 16A and 16B are rotated by 360°. and move the movable blade 12 back and forth once. The home position sensor 20 is on when the movable blade 12 is at its most retracted position. As the movable blade drive gears 16A and 16B are rotated to advance the movable blade 12, the home position sensor 20 is switched from ON to OFF when the rotation angle of the movable blade drive gears 16A and 16B reaches, for example, 40°. However, there are individual differences between devices and changes over time in this switching timing. Variation in the switching position of the home position sensor 20 affects the quality of the partial cut.

Thereafter, when the movable blade drive gears 16A and 16B rotate further, the movable blade 12 advances and the stroke amount of the movable blade 12 increases. When the rotation angle of the movable blade driving gears 16A and 16B reaches 180°, the movable blade 12 moves to the most advanced position. At this time, since the slit 12a of the movable blade 12 passes the position of the cutting edge of the fixed blade 11, the paper is fully cut (see FIG. 3B).

As the movable blade drive gears 16A and 16B rotate further, the movable blade 12 retreats. When the rotation angle of the movable blade drive gears 16A and 16B reaches, for example, 320° (=-40°), the home position sensor 20 is switched from off to on to detect that the movable blade 12 has returned to the home position. . After that, when the movable blade driving gears 16A and 16B reach the reference angle (360° (=0°)), the movable blade 12 returns to the most retracted position.

As described above, when the movable blade drive gears 16A and 16B are rotated once, the movable blade 12 operates in the full cut mode. After sending the movable blade 12 to the partial cut position, it is necessary to reversely rotate the movable blade drive gears 16A and 16B. In FIG. 5, the partial cut position of the movable blade 12 is the position when the rotation angle of the movable blade drive gears 16A and 16B reaches 140°. Therefore, control of the stroke amount of the movable blade 12 is very important in partial cutting. If the partial cut stroke amount of the movable blade 12 is too small, the width of the non-cutting portion is too wide, so that the ticket issuing portion cannot be cleanly separated from the paper body. is fully cut.

Therefore, in this embodiment, the cutter device 10 is initialized in order to accurately control the stroke amount of the movable blade 12 in the partial cut mode. The timing for performing the initialization operation is not particularly limited, but it is preferable that the initialization operation is performed, for example, every time the printer 1 is turned on, or once a plurality of times, or it is performed periodically, such as once a month or once a week. good too. Next, the initialization operation for partial cut control will be described.

FIG. 7 is a flow chart for explaining the initialization operation of the cutter device 10. As shown in FIG.

As shown in FIG. 7, in the initializing operation of the cutter device 10, the number of motor drive steps B in the ON region of the home position sensor 20 when the movable blade 12 is moved forward and backward in the vicinity of its home position is measured (steps S11, S12). Specifically, when the stepping motor 15 is rotated in the forward direction, the home position sensor 20 detects the position on the plus side (the position around plus 40°) where the home position sensor 20 is switched from ON to OFF, and then the stepping motor 15 is rotated in the reverse direction. When the home position sensor 20 detects the position on the minus side (around -40 degrees) where the home position sensor 20 switches from on to off, the number of motor drive steps B required to move from the switching position on the plus side to the switching position on the minus side is determined. to get The half value B/2 of the number of motor driving steps B means the number of driving steps of the stepping motor 15 required to move the movable blade 12 from the most retreated waiting position (home position) to the switching position of the home position sensor 20. .

Next, the difference between the measured number of motor driving steps B and the standard value (designed number of motor driving steps A) is obtained as a correction value α=(BA)/2 (step S13). The correction value α obtained in this way is stored in the memory in the control section 7 (step S14). Thus, the initialization operation is completed (step S15).

6A and 6B are diagrams schematically showing the relationship between the ON/OFF state of the home position sensor 20 and the number of steps of the stepping motor 15. FIG. (b) shows the case where the home position sensor 20 has an error.

As shown in FIG. 6A, let A be the standard number of steps in the ON region of the home position sensor 20, and N be the standard number of partial cut steps. That is, the cutter device 10 advances the movable blade 12 by the partial cut standard stroke amount by rotating the stepping motor 15 by the partial cut standard step number N from the position where the home position sensor 20 is switched from ON to OFF. is designed to be cleanly partially cut.

As shown in FIG. 6B, it is assumed that the number of measurement steps in the ON region of the home position sensor 20 of a certain cutter device 10 is B (>A). In this case, when the movable blade 12 is advanced by the partial cut standard stroke amount (partial cut standard step number N) from the position where the home position sensor 20 switches from ON to OFF, the slit 12a of the movable blade 12 passes the partial cut position. Since it stops, the paper 3P is fully cut. If B<A, the amount of partial cut stroke of the paper is insufficient, and the width of the non-cutting portion becomes too wide, so that the issuing portion cannot be cut cleanly.

Therefore, a correction value α=(B−A)/2 is obtained, and the partial cut standard step number N is corrected using this correction value α. The number of motor drive steps after correction N′=(N−α). Furthermore, the corrected number of motor drive steps required for the movable blade 12 to return to the home position (standby position) from the position where the home position sensor 20 switches from ON to OFF is A/2+α.

FIG. 8 is a flowchart for explaining an actual partial cut operation.

As shown in FIG. 8, in the partial cut operation, the stepping motor 15 is rotated forward to advance the movable blade 12 (steps S21, S22N). Then, when the movable blade 12 reaches the switching position of the home position sensor 20, the home position sensor 20 is switched from ON to OFF (step S22Y).

Next, the movable blade 12 is stopped at a position where the stepping motor 15 is rotated by (N−α) steps from the switching position (reference position) of the home position sensor 20 (step S23). As a result, the movable blade 12 can be stopped at the partial cut position because the movable blade 12 moves by a stroke amount corresponding to the corrected number of motor driving steps N′=(N−α).

Thereafter, the stepping motor 15 is reversely rotated to retract the movable blade 12 (step S24). Then, when the movable blade 12 reaches the switching position of the home position sensor 20, the home position sensor 20 is switched from OFF to ON, so that the stepping motor 15 is further rotated by a predetermined number of steps (B/2 (=A/2+α) steps). to stop the movable blade 12 at the standby position (home position) (step S26). With the above, the partial cut operation is completed.

As described above, the cutter device 10 according to the present embodiment corrects variations in the output of the home position sensor and feeds the movable blade 12 to the partial cut position. can keep. Therefore, it is possible to improve the reliability of the partial cut.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention. Needless to say, it is included within the scope.

For example, in the above embodiment, the movable blade 12 is substantially V-shaped, but the present invention is not limited to such a shape. It may have a shape inclined in one direction, or may have a corrugated shape or a sawtooth shape. That is, the present invention can be applied to various cutter devices in which the stroke amount for partial cut is different from that for full cut.

1 Printer 2 Housing 2a Ticket issuing slot 3P Paper 3R Roll paper 4 Print head 5 Platen roller 6 Paper transport path 7 Control unit 8 Power supply unit 10 Cutter device 11 Fixed blade 12 Movable blade 12a Non-cutting slit 12b Guide piece 13 Movable blade drive Mechanism 15 Stepping motor 15a Pinion gear 16A First movable blade drive gear 16B Second movable blade drive gears 17A and 17B Crank pins 18a and 18b Reduction gear 19 Movable blade holding member 19a Drive groove (long hole)
20 Home position sensor 20a Lever switch

Claims (6)

a fixed blade;
a movable blade provided to move forward and backward toward the fixed blade;
a movable blade driving mechanism for driving the movable blade in the advancing and retreating direction;
a home position sensor for detecting that the movable blade is moving near the home position, which is the most retracted position as viewed from the fixed blade;
a control unit that controls the movable blade drive mechanism based on the output of the home position sensor;
The control unit
pre-holding a partial cut standard stroke amount, which is the stroke amount of the movable blade from the standard value of the switching position of the home position sensor determined by design to the partial cut position, as a fixed value;
measuring in advance a switching position of the home position sensor in the advancing/retreating direction of the movable blade;
determining the difference between the standard value and the measured value of the switching position of the home position sensor as a correction value for the partial cut standard stroke amount;
correcting the partial cut standard stroke amount of the movable blade by subtracting the difference from the partial cut standard stroke amount,
A cutter device, wherein a paper is partially cut by sending out the movable blade with a corrected partial cut standard stroke amount. The movable blade drive mechanism includes a stepping motor,
2. The cutter according to claim 1, wherein the control unit rotates the stepping motor forward to feed the movable blade to a partial cut position, and then rotates the stepping motor in the reverse direction to return the movable blade to the home position. Device. The controller controls the stepping motor from the half value of the number of steps of the stepping motor corresponding to the ON region of the home position sensor while the movable blade makes one reciprocation in the advancing/retreating direction, from the home position to the switching position of the home position sensor. 3. The cutter device according to claim 2 , wherein the number of steps of said stepping motor required for moving said movable blade is obtained. The movable blade drive mechanism includes a movable blade drive gear that is rotationally driven by the stepping motor, and is a crank mechanism that converts rotary motion of the movable blade drive gear into reciprocating motion of the movable blade,
4. The cutter device according to claim 2, wherein the movable blade reciprocates once in the advancing/retreating direction to fully cut the paper when the movable blade drive gear rotates once . a paper feed mechanism for feeding paper onto a paper transport path;
a printing unit that prints on the paper fed out to the paper transport path by the paper feeding mechanism;
A printer, comprising: a cutter device according to any one of claims 1 to 4 for cutting the printed paper. further comprising a power supply unit that supplies power to the paper feeding mechanism, the printing unit, and the cutter device;
6. The printer according to claim 5, wherein the control unit measures the correction amount of the partial cut standard stroke amount of the movable blade when the power is turned on.

Images