CN113895157B - Printer and monitoring method for printer - Google Patents
Printer and monitoring method for printer Download PDFInfo
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- CN113895157B CN113895157B CN202111160888.1A CN202111160888A CN113895157B CN 113895157 B CN113895157 B CN 113895157B CN 202111160888 A CN202111160888 A CN 202111160888A CN 113895157 B CN113895157 B CN 113895157B
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012544 monitoring process Methods 0.000 title claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 225
- 238000005562 fading Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 9
- 238000012806 monitoring device Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0095—Detecting means for copy material, e.g. for detecting or sensing presence of copy material or its leading or trailing end
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Abstract
The application provides a printer and a monitoring method of the printer. The printer comprises a paper feeding groove, a paper feeding wheel, a monitoring device and a controller. The paper feeding groove is used for accommodating printing media; the rotation of the paper feeding wheel is used for driving the printing medium to move; the detection device is arranged opposite to the paper feeding groove and comprises a detection printing head and a position detection device, the detection printing head is used for printing detection marks on a printing medium, the detection marks can be changed in position along with the movement of the printing medium, and the position detection device is used for detecting the positions of the detection marks; the controller is connected with the position detection device and is used for determining the actual moving distance of the printing medium in the preset time according to the position change of the detection mark in the preset time detected by the position detection device, and if the actual moving distance is not matched with the theoretical moving distance, the slip fault exists between the paper feeding wheel and the printing medium, wherein the theoretical moving distance is determined according to the rotating angle of the paper feeding wheel in the preset time. The printing effect of the printer is better.
Description
Technical Field
The application relates to the technical field of printing, in particular to a printer and a monitoring method of the printer.
Background
Some printers realize the paper feeding function of the printer by controlling the paper feeding wheel to rotate so that friction is generated between the paper feeding wheel and paper to drive the paper to move. In these printers, if slipping occurs between the paper feeding wheel and the paper, there is a problem that the printed contents are not equally spaced and overlapped, and the printing effect of the printer is still to be improved.
Disclosure of Invention
The application provides an improved printer and a monitoring method of the printer, which can improve the printing effect of the printer.
The printer provided by the application comprises:
a paper feed slot for accommodating a printing medium;
the paper feeding wheel rotates to drive the printing medium to move;
the detection device is arranged opposite to the paper feeding groove and comprises a detection printing head and a position detection device, the detection printing head is used for printing a detection mark on the printing medium, the detection mark can be changed in position along with the movement of the printing medium, and the position detection device is used for detecting the position of the detection mark; and
The controller is connected with the position detection device and is used for determining the actual moving distance of the printing medium in the preset time according to the position change of the detection mark in the preset time detected by the position detection device, and if the actual moving distance is not matched with the theoretical moving distance, the slip fault exists between the paper feeding wheel and the printing medium, wherein the theoretical moving distance is determined according to the rotation angle of the paper feeding wheel in the preset time.
The method for monitoring the printer comprises the following steps:
printing a detection mark on a printing medium by detecting a printing head, wherein the detection mark can change in position along with the movement of the printing medium;
detecting the position of the detection mark by a position detection device;
determining the actual moving distance of the printing medium in the preset time according to the position change of the detection mark in the preset time detected by the position detection device;
acquiring a theoretical moving distance of the printing medium, wherein the theoretical moving distance is determined based on a rotating angle of a paper feeding wheel of the printer within the preset time period; and
And if the actual moving distance is not matched with the theoretical moving distance, determining that a slip fault exists between the paper feeding wheel and the printing medium.
In some embodiments of the present application, the printer includes a detection device that can detect an actual moving distance of the printing medium, and the controller can determine that the paper feeding wheel and the printing medium have a slip fault when the actual moving distance and the theoretical moving distance do not match. The printer can carry out effectual monitoring to the trouble that skids between feed wheel and the print medium to the user in time handles the trouble that skids, thereby can improve the printing effect of printer.
Drawings
FIG. 1 is a schematic diagram of a printer;
FIG. 2 is a schematic diagram of a printer provided in one embodiment of the present application;
FIG. 3 is a schematic view of the area division of the print medium of FIG. 2;
fig. 4 is a flowchart of a method for monitoring a printer according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus consistent with some aspects of the present application as detailed in the accompanying claims.
The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "a" or "an" and the like as used in the description and the claims do not denote a limitation of quantity, but rather denote the presence of at least one. The term "plurality" includes two, corresponding to at least two. The word "comprising" or "comprises", and the like, means that elements or items appearing before "comprising" or "comprising" are encompassed by the element or item recited after "comprising" or "comprising" and equivalents thereof, and that other elements or items are not excluded. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
Fig. 1 is a schematic diagram of a printer 100.
Referring to fig. 1, a printer 100 includes a paper feed wheel 11, a print head 12, and a paper feed slot 13. The print head 12 and the paper feed slot 13 are provided on both sides of the paper feed wheel 11. The paper feed slot 13 is for accommodating a printing medium 61 such as paper. The paper feed wheel 11 contacts the printing medium 61 in the paper feed slot 13, and generates friction force with the printing medium 61 when rotating in the clockwise direction, so as to drive the printing medium 61 to move along the direction of the printing head 12. With the movement of the printing medium 61, the printing head 12 performs a printing operation on the printing medium 61 at a corresponding frequency, such as printing on the printing medium 61 once every preset time period, so that the content having intervals, such as characters of different lines, before and after each other can be printed on the printing medium 61.
In the related art, the rotation angle of the paper feed roller 11 and the moving distance of the printing medium 61 are corresponding, for example, the paper feed roller 11 rotates one turn, and the printing medium 61 moves 10 cm toward the printing head 12. By controlling the rotation angle of the paper feed roller 11, the moving distance of the printing medium 61 can be controlled. For example, if the paper feed wheel 11 is controlled to rotate 10 degrees per second so that the printing medium 61 moves 0.28 cm per second and the print head 12 is controlled to print once per second, it is theoretically possible to print a content having a pitch of 0.28 cm in front-rear direction. However, if the paper feed roller 11 and the printing medium 61 slip, there is a possibility that the actual printing effect does not match the theoretical printing effect. For example, the paper feeding wheel 11 rotates 10 degrees in a certain 1 second, and the printing medium 61 slips between the 1 second and the paper feeding wheel 11, and actually moves only 0.1 cm, so that the space between the content printed in the 1 second and the content printed in the last 1 second is actually only 0.1 cm, which is not consistent with the theoretical front-back distance (0.28 cm); or the paper feed wheel 11 rotates 10 degrees for a certain 1 second, and the printing medium 61 slips between the 1 second and the paper feed wheel 11, and does not actually move, the content printed for the 1 second overlaps with the content printed for the last 1 second. As can be seen, the problem of slipping between the feed roller 11 and the print medium 61 can seriously affect the printing performance of the printer 100, and it is necessary to detect whether the slip between the feed roller 11 and the print medium 61 is occurring.
Fig. 2 is a schematic diagram of a printer 200 provided in one embodiment of the present application.
Referring to fig. 2, the printer 200 includes a paper feed wheel 21, a paper feed slot 23, a detection device 24, and a controller 25. The paper feed slot 23 is for receiving a print medium 62, such as paper. Fig. 3 is a schematic view of the area division of the print medium 62 in fig. 2.
Referring to fig. 3, the print medium 62 includes a print area 621 and a non-print area 622. The content to be printed of the printer 200 is printed to the print area 621. The non-print area 622 may be used to set page margins, etc.
With continued reference to fig. 2 and 3, similar to the associated description of fig. 1, rotation of the feed roller 21 is used to move the print medium 62. The rotation angle of the paper feed roller 21 and the moving distance of the printing medium 62 are corresponding. The controller 25 is configured to control the rotational angle of the feed roller 21 to control the moving distance of the print medium 62. The printer 200 includes a working printhead 22. The working printhead 22 and the paper feed slot 23 are provided on both sides of the paper feed wheel 21. When the print medium 62 is moved in the direction of the working printhead 22 by the paper feed wheel 21, the controller 25 controls the working printhead 22 to print the content to be printed in the print area of the print medium 62 at the corresponding frequency.
The detecting device 24 is disposed opposite to the paper feeding slot 23, and includes a detecting print head 241 and a position detecting device 242, wherein the detecting print head 241 is used for printing a detecting mark on the printing medium 62, and the detecting mark can change in position along with the movement of the printing medium 62. For example, assume that a test mark a is printed on print medium 62. As print medium 62 moves in the direction of working printhead 22, the position of detection mark a relative to working printhead 22 and feed wheel 22 also changes. Wherein the detection indicia includes, but is not limited to, vertical lines, patterns, or dots.
The position detecting device 242 is used for detecting the position of the detection mark. Based on the location of the detection mark, the location detection device 242 may generate a real-time signal indicative of the location of the detection mark. For example, assuming that the detection mark is located at the position B1 at the time 1 and at the position B2 at the time 2, the position detecting device 242 generates a signal indicating that the detection mark is located at the position B1 at the time 1 and generates a signal indicating that the detection mark is located at the position B2 at the time 2; for another example, if the detection mark is located at the position B1 at both the time 1 and the time 2, the position detecting device 242 generates a signal indicating that the detection mark is located at the position B1 at both the time 1 and the time 2.
The controller 25 is connected to the position detecting device 242, and is configured to determine an actual moving distance of the printing medium 62 within a preset time period according to a change in position of the detection mark within the preset time period detected by the position detecting device 242. In some embodiments, the controller 25 reads real-time signals representing the position of the detection mark from the position detection device 242 every preset time period, and determines the position change of the detection mark within the preset time period according to the read front and rear signals. For example, assuming that the controller 25 reads a signal from the position detecting device 242 once every 0.3 seconds, determines that the detection mark is located at the position B1 according to the signal read at the time T1, and determines that the detection mark is located at the position B2 according to the signal read at the time t1+0.3 seconds, the distance between the position B2 and the position B1 is the actual moving distance of the detection mark within the preset time period. Since the detection mark is located on the printing medium 62 and moves as the printing medium 62 moves, the actual moving distance of the detection mark is the moving distance of the printing medium 62.
In some embodiments, controller 25 may determine that a slip fault exists between feed wheel 21 and print medium 62 if the actual travel distance does not match the theoretical travel distance, wherein the theoretical travel distance is determined based on the angle of rotation of feed wheel 21 within a preset time period. For example, assuming that the angle by which the paper feed wheel 21 rotates within the above 0.3 seconds is 10 degrees, and that the paper feed wheel 21 rotates by 10 degrees, the theoretical moving distance of the corresponding printing medium 62 is 0.28 cm; however, if the controller 25 determines that the actual moving distance of the printing medium 62 is 0.21 cm within the above 0.3 seconds based on the signal read from the position detecting device 242, it can determine that there is a slip fault between the paper feed wheel 21 and the printing medium 62, and further can prompt the user to process the slip fault so as to ensure the printing effect.
In some embodiments of the present application, printer 200 includes a detection device 24, where detection device 24 may detect an actual distance of movement of print medium 62, and where the actual distance of movement does not match the theoretical distance of movement, controller 25 may determine that there is a slip failure between feed wheel 21 and print medium 62. The printer 200 can effectively monitor the slip fault between the paper feed wheel 21 and the printing medium 62, and prompt the user when the slip fault occurs, so that the user can process the slip fault in time, and the printing effect of the printer 200 can be improved.
Further, in some embodiments, detection device 24 is positioned opposite non-print area 622 of print medium 62 such that detection printhead 241 can print detection indicia on non-print area 622 of print medium 62 such that the detection indicia does not affect the contents of print area 621.
In some embodiments, detection printhead 241 is also used to print detection indicia on print medium 62 using fade ink. The fading ink will fade over time so as not to affect the appearance of the printed product.
The actual movement distance determination in one embodiment is described in detail below.
Referring to fig. 2, in some embodiments, a detection printhead 241 is disposed on a side of the feed slot 23 remote from the feed wheel 21. The position detecting device 242 is disposed between the detecting print head 241 and the paper feed wheel 21, and includes a plurality of detecting points 2421 arranged in sequence. The plurality of detection points 2421 may be sequentially arranged from a position close to the detection print head 241 to a position close to the paper feed roller 21, and the plurality of detection points 2421 are in the same straight line position as the detection print head 241. When the print medium 62 starts to be moved by the paper feeding wheel 21, the controller 25 may control the detection print head 241 to print a detection mark on the print medium 62. As the print medium 62 moves, the detection flag enters the detection area of the position detection device 242. When the detection flag moves to a position opposite to the detection point 2421, the corresponding detection point 2421 may detect the detection flag. As such, the plurality of detection points 2421 may be used to sequentially detect a detection signature during movement of the print medium 62. For example, when the detection mark moves to the position B1, the detection point 2421 corresponding to the position B1 may detect the detection mark; when the detection flag moves to the position B2, the corresponding detection point 2421 at the position B2 can detect the detection flag.
In some embodiments, the distance between two adjacent detection points 2421 may be on the order of microns, for example 200 microns. Thus, when the position of the detection mark changes slightly, the detection mark is detected by the different detection points 2421. If the width of the detection mark is wide, for example, 1 mm, when the detection mark moves to one position, there may be a case where the detection mark is detected at each of the plurality of detection points 2421. At this time, among the plurality of detection points 2421 at which the detection mark is detected, the detection point 2421 located in the middle may be taken as the valid detection point 2421 at which the detection mark is detected.
In some embodiments, the color of the detection flag is different from the color of the print medium 62. Each detection point 2421 is for detecting a color at a corresponding position and generating a signal corresponding to the color. For any time, when a detection mark is detected on the printing medium 62 at a certain detection point 2421 of the plurality of detection points 2421, a valid signal corresponding to the color of the detection mark is generated; when the detection flag is not detected on the print medium 62, a signal different from the valid signal, that is, a signal corresponding to the color of the print medium 62 is generated. The controller 25 determines the position of the detection mark from the signals generated by the plurality of detection points 2421. Specifically, in some embodiments, the controller 25 reads the signals generated by the detection points 2421 at preset intervals. Based on the read signal, if the controller 25 determines that there is an effective signal corresponding to the color of the print mark, the position of the detection point 2421 that generates the effective signal is taken as the position of the print mark.
In some embodiments, the controller 25 is configured to, at a start time of the preset time period, use a position of the detection point 2421 that generates the valid signal as a start position of the detection mark within the preset time period; at the end time of the preset time period, the position of the detection point 2421 generating the effective signal is used as the end position of the detection mark in the preset time period; and the distance between the end position and the start position is taken as the actual moving distance of the detection mark. For example, assuming that the preset time period is 0.3 seconds, the controller 25 reads the signals generated by the plurality of detection points 2421 at the time T1, respectively, and determines that the signal generated by the 3 rd detection point 2421 is an effective signal corresponding to the color of the detection mark in the direction from the detection print head 2421 to the paper feed wheel 21 according to the read signals, and takes the position of the 3 rd detection point 2421 as the position of the printing mark at the time T1; then, at time t1+0.3 seconds, the signals generated by the plurality of detection points 2421 are read again, and according to the read signals, it is determined that the signal generated by the 100 th detection point 2421 is a valid signal corresponding to the color of the detection mark in the direction from the detection print head 2421 to the paper feed roller 21, and then the position of the 100 th detection point 2421 is taken as the position of the printing mark at time t1+0.3 seconds. Further, the distance between the 100 th detection point 2421 and the 3 rd detection point 2421 can be determined, and used as the actual movement distance of the detection mark within the 0.3 seconds, that is, the actual movement distance of the printing medium 62 within the 0.3 seconds.
It will be appreciated that if the printer 200 fails to slip, and the print medium 62 does not move within the preset time period, the detection point 2421 for generating the valid signal is the same detection point at the start time and the end time of the preset time period, which indicates that the actual moving distance of the print medium 62 within the preset time period is 0.
In some embodiments, the position detection device 242 comprises a scanner.
In the above-described embodiment, the position detecting device 24 is provided between the detection print head 2421 and the feed roller 21 by providing the detection print head 241 to the side of the feed slot 23 remote from the feed roller 21. In this way, during the printing process of the printing medium 62, only when the printing medium 62 starts to move, the detecting print head 241 is controlled to print the detecting mark once on the printing medium 62, and the moving distance of the printing medium 62 in each preset time period during the whole printing process can be determined by detecting the position change of the detecting mark. The detection printhead 241 may be controlled to print the detection flag on the print medium 62 multiple times without having to be in the process of printing. The control logic of the controller 25 for detecting the print head 241 is simple and printing of content on the print medium 62 that is independent of the content to be printed can be reduced. In addition, the detection points 2421 and the detection print head 241 are in the same straight line position, and after the detection mark printed by the detection print head 241 moves along with the printing medium 62 to the detection area of the detection device 24, the detection points 2421 and the detection mark can be ensured to be in the positive opposite positions, so that the possibility that the detection mark is detected by the detection points 2421 is improved, and the skidding fault of the printer 200 can be detected more accurately. Meanwhile, the color of the detection mark is different from that of the printing medium 62, so that the position detection device 242 can be ensured to better identify the printing mark, and the detection accuracy is improved.
Fig. 4 is a flowchart of a method for monitoring a printer 200 according to an embodiment of the present application. The monitoring method is used to monitor whether the printer 200 has slip failure during printing of the printer 200. The monitoring method includes steps S41 to S45.
In step S41, a detection flag is printed on the print medium 62 by detecting the print head 241, wherein the detection flag may be changed in position with the movement of the print medium 62.
In some embodiments, step S41 includes: the detection mark is printed on the print medium 62 by the detection printhead 241 using the fading ink.
In step S42, the position of the detection mark is detected by the position detecting device 242.
In some embodiments, the position detecting device 242 includes a plurality of detecting points 2421 arranged in sequence between the detecting printhead 241 and the paper feed wheel 21, and step S42 includes:
1) The plurality of detection points 2421 sequentially detect the detection marks during the movement of the print medium 62.
2) For any time, when a detection mark is detected on the printing medium 62 at a certain detection point 2421 of the plurality of detection points 2421, a valid signal corresponding to the color of the detection mark is generated; when the detection flag is not detected on the print medium, a signal different from the valid signal is generated.
3) The position of the detection mark is determined from the signals generated by the plurality of detection points 2421.
In step S43, the actual moving distance of the printing medium 62 in the preset time period is determined according to the change in the position of the detection flag in the preset time period detected by the position detecting device 242.
In some embodiments, step S43 includes: at the starting time of the preset time, the position of a detection point generating an effective signal is used as the starting position of a detection mark in the preset time; at the end time of the preset time, the position of the detection point generating the effective signal is used as the end position of the detection mark in the preset time; and the distance between the end position and the start position is taken as the actual moving distance of the detection mark.
In step S44, a theoretical moving distance of the printing medium 62 is acquired, which is determined based on the rotation angle of the paper feed wheel 21 of the printer 200 within a preset period of time.
In step S45, if the actual moving distance does not match the theoretical moving distance, it is determined that there is a slip failure between the paper feed wheel 21 and the printing medium 62.
In some embodiments, the monitoring method further comprises: after determining that there is a slip failure between the feed roller 21 and the print medium 62, a failure alarm is given to facilitate the user to handle the failure in time. The fault alarm mode includes, but is not limited to, voice alarm and interface prompt.
In other embodiments, the monitoring method further comprises: after determining that there is a slip failure between the feed roller 21 and the print medium 62, the printer 200 is controlled to stop operating, and printing is continued after the failure is cleared, so that the printing effect is ensured.
For the description of steps S41 to S45, reference may be made to fig. 2 for the description of the printer 200, which is not repeated here.
The monitoring method of the printer 200 provided by the application can effectively monitor the slip fault between the paper feeding wheel 21 and the printing medium 62.
The foregoing description of the preferred embodiments of the present invention is not intended to limit the invention to the precise form disclosed, and any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A printer, the printer comprising:
a paper feed slot for accommodating a printing medium;
the paper feeding wheel rotates to drive the printing medium to move;
the detection device is arranged opposite to the paper feeding groove and comprises a detection printing head and a position detection device, the detection printing head is used for printing a detection mark on the printing medium, the detection mark can be changed in position along with the movement of the printing medium, and the position detection device is used for detecting the position of the detection mark; and
The controller is connected with the position detection device and is used for determining the actual moving distance of the printing medium in the preset time according to the position change of the detection mark in the preset time detected by the position detection device, and if the actual moving distance is not matched with the theoretical moving distance, the slip fault exists between the paper feeding wheel and the printing medium, wherein the theoretical moving distance is determined according to the rotation angle of the paper feeding wheel in the preset time;
the detection device is arranged at a position opposite to a non-printing area of the printing medium, and the detection printing head is used for printing a detection mark on the non-printing area of the printing medium;
the position detection device is arranged between the detection printing head and the paper feeding wheel and comprises a plurality of detection points which are sequentially arranged, wherein in the moving process of the printing medium, the plurality of detection points can be used for sequentially detecting the detection marks;
for any moment, when a detection point in the plurality of detection points detects the detection mark on the printing medium, generating a valid signal corresponding to the color of the detection mark; when the detection mark is not detected on the printing medium, a signal different from the effective signal is generated, and the controller determines the position of the detection mark according to the signals generated by the detection points, wherein the color of the detection mark is different from that of the printing medium;
the controller is further configured to, at a start time of the preset duration, use a position of the detection point that generates the effective signal as a start position of the detection mark within the preset duration; at the end time of the preset time period, the position of the detection point generating the effective signal is used as the end position of the detection mark in the preset time period; and taking the distance between the end position and the start position as the actual moving distance of the detection mark.
2. The printer of claim 1, wherein the detection printhead is disposed on a side of the feed slot remote from the feed wheel.
3. The printer of claim 1 wherein the plurality of detection points are in a collinear position with the detection printhead.
4. The printer of claim 1, said detection printhead further for printing said detection indicia on said print medium using fade ink.
5. A method of monitoring a printer as claimed in any one of claims 1 to 4, comprising:
printing a detection mark on a printing medium by detecting a printing head, wherein the detection mark can change in position along with the movement of the printing medium;
detecting the position of the detection mark by a position detection device;
determining the actual moving distance of the printing medium in the preset time according to the position change of the detection mark in the preset time detected by the position detection device;
acquiring a theoretical moving distance of the printing medium, wherein the theoretical moving distance is determined based on a rotating angle of a paper feeding wheel of the printer within the preset time period; and
And if the actual moving distance is not matched with the theoretical moving distance, determining that a slip fault exists between the paper feeding wheel and the printing medium.
6. The method of monitoring as claimed in claim 5, wherein said detecting the location of the detection mark by the location detecting means comprises:
the detection marks are sequentially detected by the plurality of detection points in the moving process of the printing medium;
for any moment, when a detection point in the plurality of detection points detects the detection mark on the printing medium, generating a valid signal corresponding to the color of the detection mark; when the detection mark is not detected on the printing medium, generating a signal different from the effective signal; and
The position of the detection mark is determined according to signals generated by the detection points.
7. The method of monitoring as set forth in claim 6, wherein the determining the actual moving distance of the printing medium in the preset time period based on the change in the position of the detection flag in the preset time period detected by the position detecting means includes:
at the starting time of the preset time, the position of the detection point generating the effective signal is used as the starting position of the detection mark in the preset time; at the end time of the preset time period, the position of the detection point generating the effective signal is used as the end position of the detection mark in the preset time period; and taking the distance between the end position and the start position as the actual moving distance of the detection mark.
8. The method of monitoring as in claim 5, wherein printing the detection signature on the print medium by the detection printhead comprises:
the detection mark is printed on the printing medium by the detection printing head by using the fading ink.
9. The monitoring method of claim 5, wherein the monitoring method further comprises: and after the slip fault exists between the paper feeding wheel and the printing medium, carrying out fault alarm or controlling the printer to stop working.
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| JP4366150B2 (en) * | 2003-09-05 | 2009-11-18 | キヤノン株式会社 | Recording device |
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