CN114475023A - Paper feed correction method and printer - Google Patents
Paper feed correction method and printer Download PDFInfo
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- CN114475023A CN114475023A CN202210179942.5A CN202210179942A CN114475023A CN 114475023 A CN114475023 A CN 114475023A CN 202210179942 A CN202210179942 A CN 202210179942A CN 114475023 A CN114475023 A CN 114475023A
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- paper
- point signal
- printer
- time
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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
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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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- 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
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
- B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Controlling Sheets Or Webs (AREA)
Abstract
The invention relates to a paper feed correction method, which is characterized by comprising the following steps: after the printing work is started, calculating the actual paper pickup time T1 according to the detected paper starting point signal and the detected paper end point signal, and calculating the theoretical paper pickup time T0 to be L/V0 according to the length L of the current paper and the set paper pickup speed V0 of the paper pickup mechanism; the turn-on time point of the image forming apparatus at one print job is determined based on the time difference of T1 with respect to T0. The paper feed correction method can better and more accurately solve the problem of vertical offset of the printed image. The invention also relates to a printer, which comprises a shell, a paper twisting mechanism, a paper picking mechanism and an imaging device, wherein the paper twisting mechanism, the paper picking mechanism and the imaging device are arranged in the shell; the printer applies the aforementioned paper feed correction method and detects a paper start point signal and a paper end point signal by a paper detection sensor. The printer has better printing effect.
Description
Technical Field
The invention relates to the technical field of printers, in particular to a paper feeding correction method and a printer applying the paper feeding correction method.
Background
The existing printer usually sets up detection devices at the upstream and downstream of the paper picking mechanism respectively to detect a paper picking signal and an imaging device trigger signal, and then controls the paper picking mechanism to work according to the paper picking signal to pick paper, and controls the imaging device at the downstream of the paper picking mechanism to start working according to the imaging device trigger signal, that is, paper moves into a paper feeding channel under the action of a pickup roller, and when the paper triggers the detection device at the upstream of the paper picking mechanism to acquire the paper picking signal, the paper picking mechanism is correspondingly controlled to work to realize the paper picking action. When the paper moves to touch the detection device at the downstream of the paper picking mechanism under the action of the paper picking mechanism to acquire the trigger signal of the imaging device, the imaging device is controlled to start working, and the image printing work on the paper is realized. However, during the paper picking process, due to various uncontrollable factors, the paper picking process can cause slight left and right skew of the paper. In addition, when the paper reaches the position of the paper feeding roller, the actual paper picking speed of the paper is too fast or too slow relative to the set paper picking speed due to some paper differences or other relatively stable influence factors, so that the time when the paper collides with a detection device at the downstream of the paper feeding roller is changed, the phenomenon of early or late opening in an imaging device is further caused, and the image printed on the paper is wholly shifted downwards or upwards.
Disclosure of Invention
A first technical problem to be solved by the present invention is to provide a paper feed correction method for solving the problem of vertical offset of a printed image in view of the above-mentioned prior art.
A second technical problem to be solved by the present invention is to provide a printer with low cost and capable of solving the problem of vertical offset of a printed image in view of the above-mentioned prior art.
A third technical problem to be solved by the present invention is to provide a printer capable of improving the left-right skew problem during paper feeding in view of the above prior art.
The technical scheme adopted by the invention for solving the first technical problem is as follows: a paper feed correction method is characterized in that: after the printing work is started, calculating the actual paper pickup time T1 according to the detected paper starting point signal and the detected paper end point signal, and calculating the theoretical paper pickup time T0 to be L/V0 according to the length L of the current paper and the set paper pickup speed V0 of the paper pickup mechanism;
the turn-on time point of the image forming apparatus at one print job is determined based on the time difference of T1 with respect to T0.
Simply, calculating the starting time point of the imaging device in the next printing work as the time point with the time length T after acquiring the paper starting point signal, wherein T is Ts-T, and T is T0-T1; wherein Ts is the initial time length after the starting point signal of the paper is obtained at the set starting time point distance of the imaging device.
Preferably, the actual paper pickup time T1 is calculated by: controlling the paper twisting action, and recording a time point K1 corresponding to the acquired paper starting point signal when the paper starting point signal is acquired; and controlling paper picking work according to the paper starting point signal, and recording a time point K2 corresponding to the paper end point signal when the paper end point signal is acquired, and calculating T1 to K2-K1.
The technical scheme adopted by the invention for solving the second technical problem is as follows: the utility model provides a printer, includes casing and sets up rubbing paper mechanism, paper picking mechanism, the image forming device in the casing, its characterized in that: the paper detection sensor is arranged at the paper feeding position of the paper picking mechanism;
the paper start point signal and the paper end point signal are detected by the paper detection sensor using the paper feed correction method as described above.
In order to effectively realize the detection of the paper action, the paper detection device also comprises a deflector rod which is rotatably arranged on the shell, and the deflector rod is arranged corresponding to the paper detection sensor and can trigger the paper detection sensor along with the paper action.
The technical scheme adopted by the invention for solving the third technical problem is as follows: the automatic transmission mechanism is characterized by further comprising a baffle extending in the left-right direction, the baffle is connected to the machine shell in a rotating mode through a shaft rod, and the shifting lever is arranged on the baffle.
In order to better correct the left and right skew of the paper, after the front end of the paper collides with the baffle, the paper twisting mechanism is controlled to pause for a set time length T2 and then is controlled to work.
In order to reduce the quality of the baffle and ensure the normal operation of paper picking action, the baffle comprises a plurality of plate bodies arranged at intervals.
In order to avoid the blockage of the normal running of the paper, the plate body extends from top to bottom in a bending way towards the moving direction of the paper.
In order to avoid the blockage of the normal running of the paper, the deflector rod extends towards the moving direction of the paper from top to bottom in a bending way.
Compared with the prior art, the invention has the advantages that: according to the paper feeding correction method, the influence of the actual paper picking speed is judged according to the time difference between the actual paper picking time and the theoretical paper picking time, and the starting time point of the imaging device is adjusted based on the time difference, so that the starting time point of the imaging device can be effectively matched with the actual paper picking speed. And the calculation is relatively simple by adjusting the starting time point of the imaging device, the adjustment control is more timely and accurate, and compared with the uncontrollable influence factor which can occur in the process of adjusting the paper picking speed, the adjustment method is more accurate, and the problem of vertical offset of the printed image can be better and more accurately solved.
The printer using the paper feeding correction method can well solve the problem of vertical deviation of the image, and has better printing effect.
In addition, the printer of the invention also improves the left and right skew problem of the paper through the baffle structure.
Drawings
Fig. 1 is a perspective view of a printer in an embodiment of the present invention.
Fig. 2 is a flowchart of a paper feeding correction method according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1, the printer in this embodiment includes a housing, a paper pickup mechanism 1, and an image forming apparatus, which are disposed in the housing, and further includes a paper detection sensor disposed at a paper feeding position of the paper pickup mechanism 1. The paper rubbing mechanism, the paper picking mechanism 1 and the imaging device can adopt corresponding structures in the existing printer. The paper feeding process of the printer generally includes firstly controlling the paper twisting mechanism to work, then twisting paper in the paper box to move, triggering the paper detection sensor when the paper reaches the paper feeding position of the paper picking mechanism 1, and then controlling the paper picking mechanism 1 to start working in advance based on a trigger signal of the paper detection sensor, so that the rotating speed of the paper picking mechanism 1 is stabilized at a set paper picking speed when the paper reaches the position of the paper picking mechanism 1. The paper pickup mechanism continues to drive the paper, and when the front end of the paper reaches the paper pickup mechanism 1, the paper pickup mechanism 1 starts to drive the paper to continue to advance. Then, the image forming apparatus needs to be activated at a time a set time from the start of picking up the paper, and a preset image is printed on the paper. Based on the difference of the paper and some fixed influences of the internal structure of the printer, the situation that the actual paper picking speed of the paper and the set paper picking speed of the paper picking mechanism 1 are different may be caused, so that the starting time of the imaging device needs to be adjusted, and the problem that the image printed on the paper is shifted upwards or downwards is avoided. In general, if the actual paper pickup speed is faster than the set paper pickup speed, and the image forming apparatus is still turned on at the originally set timing, a problem of image shift-down occurs, and conversely, a problem of image shift-up occurs. In addition, the situation that the paper is skewed from side to side is inevitable in the paper picking process.
Rotate on the casing and be provided with driving lever 2, this driving lever 2 corresponds to paper detection sensor setting and can trigger paper detection sensor along with the paper action, if can set up the trigger piece on driving lever 2, after the paper touched driving lever 2, the paper moved under the drive of paper pickup mechanism, and then drove driving lever 2 and put upward, so make the trigger piece on driving lever 2 trigger paper detection sensor, paper detection sensor acquires the paper starting point signal, can begin to control paper pickup mechanism 1 according to the paper starting point signal this moment and begin to pick up paper work. And after the paper passes through the position of the shift lever 2 completely, the shift lever 2 swings downwards, and then the triggering of the paper detection sensor is released, and then the paper end point signal can be obtained. The whole paper passing process can be effectively known through the paper starting point signal and the paper end point signal.
In this embodiment, a baffle 3 is further rotatably connected to the housing, the baffle 3 extends along the left-right direction and is fixed to a shaft rod 4, and two ends of the shaft rod 4 are rotatably limited on the housing, so that the baffle 3 is rotatably connected to the housing. And the deflector rod 2 is arranged on the baffle 3, so that the structure is simplified. In addition, in order to ensure that the paper can reliably contact the deflector rod 2, the deflector rod 2 is arranged at the middle position in the left-right direction of the baffle 3.
When the paper moves to the position of the baffle 3, because the paper moves with certain movement inertia, in the embodiment, after the front end of the paper collides with the baffle 3, the paper rubbing mechanism is controlled to pause, so that the paper can automatically realize left-right skew correction under the action of the baffle 3 based on the movement inertia of the paper, and the left-right skew problem of the paper is effectively improved. When the pause time of the paper twisting mechanism reaches a set time T2, the paper twisting mechanism is controlled to work, then the paper pushes the push plate to swing upwards based on the driving force of the paper twisting mechanism, the shifting lever 2 is driven to swing upwards, and the paper detection sensor is triggered based on the shifting lever 2 to acquire a paper starting point signal. The paper picking mechanism 1 is controlled to work based on the paper starting point signal, the rotating speed of the paper picking mechanism 1 can reach the set speed within the time that the paper moves from the position of the baffle 3 to the position of the paper picking mechanism 1, and then the paper is continuously driven to move through the driving of the paper picking mechanism 1. And after the tail end of the paper leaves the position of the baffle 3, the baffle 3 and the deflector rod 2 synchronously swing downwards, and the trigger of the paper detection sensor is released, so that a paper end point signal is obtained.
In this process, in order to guarantee that the paper rubbing mechanism drives the paper and can make baffle 3 and driving lever 2 swing up in step, the quality on baffle 3 can not be too high, and in order to reduce the quality of baffle 3, guarantee the normal clear of picking up paper action to the paper, baffle 3 in this embodiment includes the polylith plate body that the interval set up, and these plate bodies are arranged along left right direction and are fixed on axostylus axostyle 4. In addition, in order to avoid the blockage of normal advancing of paper, the plate body extends towards the moving direction of the paper from top to bottom in a bending way, the shifting rod 2 also extends towards the moving direction of the paper from top to bottom in a bending way, the extending directions of the plate body and the shifting rod 2 conform to the paper feeding direction, the paper advancing cannot be hindered, and the smooth paper feeding is ensured.
The printer can adopt the following paper feeding correction method to solve the problem of up-and-down deviation of images in the printing process and improve the printing effect.
As shown in fig. 2, the paper feed correction method includes: after the print job is started, the paper start point signal and the paper end point signal are detected by the paper detection sensor.
The actual paper pickup time T1 is calculated from the paper start point signal and the paper end point signal obtained by the detection. Specifically, the paper twisting action is controlled, after the paper reaches the position of the shifting lever 2, the shifting lever 2 is driven to swing upwards based on the driving of the paper twisting mechanism to the paper, the shifting lever 2 triggers the paper detection sensor to further acquire a paper starting point signal, and when the paper starting point signal is acquired, a time point K1 corresponding to the acquired paper starting point signal is recorded. And controlling paper picking according to the starting point signal of the paper, controlling the imaging device to start working after a specific time length A after the paper picking is started, and further printing an image on the paper. The time length A is Ts or T, when the printing work of the first paper after the printer is started, the time length A adopts Ts, and the time length A adopts T when the printing work of the subsequent paper is started.
After the tail end of the paper passes through the position of the shifting lever 2, the shifting lever 2 is released to swing downwards, then the triggering of the paper detection sensor is released, then a paper end point signal can be obtained, and when the paper end point signal is obtained, a time point K2 corresponding to the paper end point signal is recorded. Then, the actual paper pickup time T1 of the current paper is calculated to be K2-K1.
Since the length of the paper is fixed and the set paper pickup speed of the printer is also fixed, the theoretical paper pickup time T0 may be calculated as L/V0 from the length L of the current paper and the set paper pickup speed V0 of the paper pickup mechanism 1.
In the paper picking process, the actual paper picking speed is possibly different from the theoretical paper picking speed due to paper or other structural factors, so that the difference of the paper picking time is caused, the starting time point of the imaging device in one-time printing is determined based on the time difference of T1 relative to T0, the vertical offset adjustment of the printed image is realized, the vertical offset problem of the printed image is solved, and the printing effect is improved.
Specifically, the starting time point of the imaging device in the next printing work is calculated as the time point with the time length T after the paper starting signal is acquired, wherein T is Ts-T, and T is T0-T1; wherein Ts is the initial time length after the starting point signal of the paper is obtained at the set starting time point distance of the imaging device.
According to the paper feeding correction method, the influence of the actual paper picking speed is judged according to the time difference between the actual paper picking time and the theoretical paper picking time, and the starting time point of the imaging device is adjusted based on the time difference, so that the starting time point of the imaging device can be effectively matched with the actual paper picking speed. And the calculation is relatively simple by adjusting the starting time point of the imaging device, the adjustment control is more timely and accurate, and compared with the uncontrollable influence factor which can occur in the process of adjusting the paper picking speed, the adjustment method is more accurate, and the problem of vertical offset of the printed image can be better and more accurately solved.
The printer using the paper feeding correction method can well solve the problem of vertical deviation of the image, and has better printing effect. In addition, the printer of the invention also improves the left and right skew problem of the paper by the structure of the baffle 3.
Through the solution to the skew problem about printing the image to and the improvement of crooked problem about the paper, can improve the effect of printing the image on the paper greatly, user experience is better.
Directional terms such as "front," "rear," "upper," "lower," "left," "right," "side," "top," "bottom," and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the invention, but are used herein for convenience of description only and are to be determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the present invention may be oriented in different directions, the directional terms are used for descriptive purposes and are not to be construed as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity.
Claims (10)
1. A paper feed correction method is characterized in that: after the printing work is started, calculating the actual paper pickup time T1 according to the detected paper starting point signal and the detected paper end point signal, and calculating the theoretical paper pickup time T0 to be L/V0 according to the length L of the current paper and the set paper pickup speed V0 of the paper pickup mechanism (1);
the turn-on time point of the image forming apparatus at one print job is determined based on the time difference of T1 with respect to T0.
2. The paper feed correction method according to claim 1, characterized in that: calculating the starting time point of the imaging device in the next printing work as the time point with the time length T after obtaining the paper starting signal, wherein T is Ts-T, and T is T0-T1; wherein Ts is the initial time length after the starting point signal of the paper is obtained at the set starting time point distance of the imaging device.
3. The paper feed correction method according to claim 2, characterized in that: the actual paper pickup time T1 is calculated by the following method: controlling the paper twisting action, and recording a time point K1 corresponding to the acquired paper starting point signal when the paper starting point signal is acquired; and controlling paper picking work according to the paper starting point signal, and recording a time point K2 corresponding to the paper end point signal when the paper end point signal is acquired, and calculating T1 to K2-K1.
4. The utility model provides a printer, includes casing and sets up rubbing paper mechanism, pick up paper mechanism (1), the image forming device in the casing, its characterized in that: the paper picking mechanism also comprises a paper detection sensor arranged at the paper feeding position of the paper picking mechanism (1);
the sheet-feed correction method according to any one of claims 1 to 3, wherein the sheet start point signal and the sheet end point signal are detected by a sheet detection sensor.
5. The printer of claim 4, wherein: the paper detection device is characterized by further comprising a shifting lever (2) rotatably arranged on the machine shell, wherein the shifting lever (2) is arranged corresponding to the paper detection sensor and can trigger the paper detection sensor along with the action of paper.
6. The printer according to claim 5, wherein: the automatic transmission mechanism is characterized by further comprising a baffle (3) extending in the left-right direction, the baffle (3) is rotatably connected to the shell through a shaft lever (4), and the shifting lever (2) is arranged on the baffle (3).
7. The printer of claim 6, wherein: when the front end of the paper hits the baffle (3), the paper twisting mechanism is controlled to pause for a set time length T2 and then is controlled to work.
8. The printer according to claim 6, wherein: the baffle (3) comprises a plurality of plate bodies arranged at intervals.
9. The printer of claim 8, wherein: the plate body is bent and extended towards the moving direction of the paper from top to bottom.
10. A printer according to any one of claims 5 to 9, wherein: the shifting lever (2) bends and extends towards the moving direction of the paper from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210179942.5A CN114475023B (en) | 2022-02-25 | 2022-02-25 | Paper feeding correction method and printer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210179942.5A CN114475023B (en) | 2022-02-25 | 2022-02-25 | Paper feeding correction method and printer |
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| CN114475023A true CN114475023A (en) | 2022-05-13 |
| CN114475023B CN114475023B (en) | 2023-06-20 |
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| KR20040073861A (en) * | 2003-02-15 | 2004-08-21 | 삼성전자주식회사 | Calibrating method of paper feeding of inkjet printer |
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