CN111152580A - Detection signal transmission method for multi-nozzle scanning type ink-jet printer - Google Patents
Detection signal transmission method for multi-nozzle scanning type ink-jet printer Download PDFInfo
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- CN111152580A CN111152580A CN202010003589.6A CN202010003589A CN111152580A CN 111152580 A CN111152580 A CN 111152580A CN 202010003589 A CN202010003589 A CN 202010003589A CN 111152580 A CN111152580 A CN 111152580A
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- detection signal
- control board
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- spray head
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
- G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
- G06F11/1004—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's to protect a block of data words, e.g. CRC or checksum
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- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Ink Jet (AREA)
Abstract
The invention discloses a method for transmitting detection signals of a multi-nozzle scanning type ink-jet printer, which belongs to the technical field of ink-jet printers and is characterized by at least comprising the following steps: s1, the main control board carries out uneven secondary coding on the detection signal and adds verification processing at the tail of the transmission packet; s2, transmitting the processed signals to each spray head control board through an output port in a two-way mode of each channel; and S3, controlling the spray head to print by the spray head control board. By adopting the technical scheme, the multi-nozzle scanning type ink-jet printer detection signal transmission method adopts an uneven coding mode in the signal transmission process, introduces CRC (cyclic redundancy check) and simultaneously ensures the stability of signal transmission by means of two paths of signals.
Description
Technical Field
The invention belongs to the technical field of ink-jet printers, and particularly relates to a detection signal transmission method of a multi-nozzle scanning type ink-jet printer.
Background
Inkjet printers can be divided into two categories according to the way of printing pictures and texts, one category is that a nozzle reciprocates to spray pictures and texts: the other type is the mode of ejecting pictures and texts in a mode that the nozzle does not move and the printing medium moves, and the Oneepass mode. The Oneepass mode has high printing paper feeding speed which can reach 200m/s or higher, but the number of the nozzles used for a wide-format printer is too large, and the cost is too high. In order to take cost and printing speed into consideration, the multi-nozzle reciprocating motion jet printing can be adopted, and the high-speed printing with low cost is realized.
In such a high-speed printing process, usually, image-text data as a printing target is stored in a PC host, the image-text data includes an image or a text, the image-text data is converted into conversion data in a printable format by raster image processing, and finally the printable data after raster image processing is transmitted to a nozzle for image-text printing. The nozzle control board is a joint circuit board from the control system of the ink-jet printer to the nozzles, each nozzle needs an own interface circuit, one end of the nozzle control board is connected with the nozzle, and the other end of the nozzle control board is connected with the main control board.
According to specific requirements, the multi-nozzle reciprocating printing requires multiple nozzles to simultaneously print multiple images and texts on a printing medium, and the main control board is connected with multiple nozzle control boards. When the nozzles start printing, the nozzles are determined by the received paper width detection signals, one of which is a print medium edge position signal detected by a sensor, and the other of which is a raster signal detected by an encoder, and the detected signals are simultaneously transmitted to a plurality of nozzle control boards.
However, in the signal transmission process, the requirement on the quality of the line is high, data loss is easy to occur in the transmission process, or the analysis of the nozzle control board fails due to interference in a complex system, and then an error is reported and printing is stopped. In this case, the synchronous transmission system is unstable, and some improvement techniques are required.
Disclosure of Invention
The present invention provides a method for transmitting detection signals of a multi-nozzle scanning type inkjet printer, which can synchronously tap the detection signals into multi-channel signals and ensure stable signal transmission.
The invention aims to provide a signal transmission method of an ink-jet printer, which comprises the following steps:
s1, the main control board carries out uneven secondary coding and CRC check processing on the detection signal at the tail of the transmission packet;
s2, transmitting the processed signals to each spray head control board through an output port in a two-way mode of each channel;
and S3, controlling the spray head to print by the spray head control board.
Further, the detection signal is a printing medium page width position detection signal.
Further, when non-uniform secondary encoding is performed, the signal data byte is prevented from having a length of 0 or 1.
Further, the two-way mode of each channel specifically comprises: the two paths of signals are completely the same, if the receiving party receives the correct signal packet which is greater than or equal to one path, the signal is considered to be correctly received: if the two signals are invalid in the receiving process, the two signals are regarded as temporary error codes, and a page starting position signal is supplemented at the position of the error codes.
Further, after a page start position signal is supplemented at the error code place, if the error codes continuously appear, it indicates that the communication line has a serious fault at the moment, and the error reporting and maintenance is started.
The invention has the advantages and positive effects that:
the invention adopts a non-uniform coding mode, introduces CRC (cyclic redundancy check) and simultaneously ensures the stability of signal transmission by depending on two paths of signals.
Drawings
FIG. 1 is a schematic diagram of a technical route for transmission from a main control board to a showerhead control board according to a preferred embodiment of the present invention;
FIG. 2 is a block diagram of the main configuration units of the main control board for detecting signals according to the preferred embodiment of the present invention;
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
referring to fig. 1 to 2, a signal transmission method of an inkjet printer includes:
a. the main control board carries out uneven secondary coding on the detection signal and adds CRC check processing at the tail of the transmission packet;
b. the processed signals are transmitted to each spray head control panel from an output port in a two-way mode of each channel;
c. the nozzle control panel controls the nozzle to print.
Preferably, the main control board in step a) receives a print medium page width position detection signal detected by the sensor.
Preferably, the non-uniform secondary encoding in step b) prevents the signal data bytes from having a length of 0 or 1.
Preferably, the step c) adopts a two-way transmission mode per channel, and the specific method comprises the following steps: the two paths of signals are completely the same, if the receiving party receives the correct signal packet which is greater than or equal to one path, the signal is considered to be correctly received: if the two signals are invalid in the receiving process, the two signals are regarded as temporary error codes, and a page starting position signal is supplemented at the position of the error codes.
In the signal transmission method of the ink-jet printer, after the error code position is supplemented with a page starting position signal, if the error code continuously appears, the serious fault of the communication line at the moment is indicated, and the error reporting and maintenance are started.
As shown in fig. 1, it can be seen that, in the transmission process of sending the detected medium page width signal to the first nozzle control board, the second nozzle control board and other multiple nozzle control boards, an uneven coding mode, CRC check added at the tail of the transmission packet, and a two-way transmission mode per channel are respectively used to ensure the anti-interference performance of signal transmission.
The detection signal processing speed is nanosecond, the speed can ensure that a plurality of channels output signals at the same time, then each channel output signal is transmitted to a corresponding nozzle control panel, namely a plurality of nozzle plates such as a first nozzle control panel and a second nozzle control panel, each nozzle control panel is connected with at least one nozzle, and after a page starting position signal and a grating signal are transmitted to the nozzle control panels, the nozzle control panels control the nozzles to spray ink drops when a printing medium is transmitted to a preset image-text position, so that the inkjet printing is completed.
Fig. 2 is a block diagram of a main configuration unit of a main control board for processing a detection signal according to an embodiment of the present invention, where the main configuration unit of the tapping board includes an FPGA, a sensor interface, an encoder interface, multiple output ports, and a power supply module, the sensor interface on the main control board receives a page width signal interface detected by a sensor, the encoder interface receives a grating signal detected by the encoder, the FPGA synchronously and parallelly splits the received page width position signal and the grating signal into multiple identical channel signals from one channel signal, and synchronously transmits the channel signals to the multiple output ports, that is, multiple output ports such as a first output port and a second output port, each output port is connected to a nozzle control board, and the output ports respectively transmit the identical page width position signal and the grating signal to the nozzle control board through hardware connection lines to control nozzles to jet ink. It should be noted that all of the output ports may not be used, i.e., a certain port is not connected to the head control board.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (5)
1. A detection signal transmission method of a multi-nozzle scanning type ink-jet printer is characterized by at least comprising the following steps:
s1, the main control board carries out uneven secondary coding and CRC check processing on the detection signal at the tail of the transmission packet;
s2, transmitting the processed signals to each spray head control board through an output port in a two-way mode of each channel;
and S3, controlling the spray head to print by the spray head control board.
2. The method of claim 1, wherein the detection signal is a print medium page width position detection signal.
3. The method of claim 1, wherein the signal data bytes are free from 0 and 1 bytes in length when the non-uniform secondary encoding is performed.
4. The method for transmitting the detection signal of the multi-nozzle scanning type inkjet printer according to claim 1, wherein the two-way mode for each channel is specifically as follows: the two paths of signals are completely the same, if the receiving party receives the correct signal packet which is greater than or equal to one path, the signal is considered to be correctly received: if the two paths of signals are invalid in the receiving process, the signals are regarded as temporary error codes, and a page width position signal is supplemented at the position of the error codes.
5. The method as claimed in claim 4, wherein after the error code is added to a page start position signal, if the error code occurs continuously, it indicates that the communication line has a serious fault, and the error reporting and repairing is started.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010003589.6A CN111152580A (en) | 2020-01-03 | 2020-01-03 | Detection signal transmission method for multi-nozzle scanning type ink-jet printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010003589.6A CN111152580A (en) | 2020-01-03 | 2020-01-03 | Detection signal transmission method for multi-nozzle scanning type ink-jet printer |
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| CN111152580A true CN111152580A (en) | 2020-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010003589.6A Pending CN111152580A (en) | 2020-01-03 | 2020-01-03 | Detection signal transmission method for multi-nozzle scanning type ink-jet printer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113478972A (en) * | 2021-07-26 | 2021-10-08 | 天津七所精密机电技术有限公司 | Improved generation shower nozzle control system |
Citations (5)
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|---|---|---|---|---|
| CN102834266A (en) * | 2010-02-11 | 2012-12-19 | 马肯依玛士公司 | Industrial inkjet printer with digital communications |
| CN104057731A (en) * | 2014-07-04 | 2014-09-24 | 北京美科艺数码科技发展有限公司 | Signal synchronization tapping plate for ink jet printer and signal transmission method |
| CN106626828A (en) * | 2016-12-30 | 2017-05-10 | 北京美科艺数码科技发展有限公司 | Inkjet printer signal transmission method |
| CN109002267A (en) * | 2018-07-09 | 2018-12-14 | 森大（深圳）技术有限公司 | More nozzle printing data synchronization transmission methods, device, equipment and storage medium |
| CN109426467A (en) * | 2017-09-05 | 2019-03-05 | 北京立思辰计算机技术有限公司 | A kind of laser printer method for transmitting signals |
-
2020
- 2020-01-03 CN CN202010003589.6A patent/CN111152580A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102834266A (en) * | 2010-02-11 | 2012-12-19 | 马肯依玛士公司 | Industrial inkjet printer with digital communications |
| CN104057731A (en) * | 2014-07-04 | 2014-09-24 | 北京美科艺数码科技发展有限公司 | Signal synchronization tapping plate for ink jet printer and signal transmission method |
| CN106626828A (en) * | 2016-12-30 | 2017-05-10 | 北京美科艺数码科技发展有限公司 | Inkjet printer signal transmission method |
| CN109426467A (en) * | 2017-09-05 | 2019-03-05 | 北京立思辰计算机技术有限公司 | A kind of laser printer method for transmitting signals |
| CN109002267A (en) * | 2018-07-09 | 2018-12-14 | 森大（深圳）技术有限公司 | More nozzle printing data synchronization transmission methods, device, equipment and storage medium |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113478972A (en) * | 2021-07-26 | 2021-10-08 | 天津七所精密机电技术有限公司 | Improved generation shower nozzle control system |
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