阅读说明：本技术 一种导带式喷墨印花机导带步进控制机构及其控制方法 (Conduction band stepping control mechanism of conduction band type ink-jet printing machine and control method thereof ) 是由 葛晨文 卢明杰 于 2020-06-30 设计创作，主要内容包括：本申请涉及一种导带式喷墨印花机导带步进控制机构及其控制方法,导带式喷墨印花机导带步进控制机构设置有接近开关、金属检测体、主动辊转动角度读取装置,主动辊转动角度读取装置包括磁栅、磁栅双读头,磁栅双读头由第一磁栅读头、第二磁栅读头组成,磁栅环绕安装在主动辊上,磁栅两端连接处为磁栅接口,接近开关与金属检测体配合,接近开关用来探测磁栅接口是否接近某磁栅读头以及磁栅接口是否刚离开某磁栅读头,接近开关检测到金属检测体接近信号至金属检测体离开信号的时间段覆盖磁栅读头转换时间段且早于另一个磁栅读头接近磁栅接口的时间。本申请还包括上述导带步进控制机构的控制方法。本申请结构简洁,使用方便,打印精度高,效果好。(The utility model relates to a conduction band stepping control mechanism of conduction band type ink jet printing machine and a control method thereof, the conduction band stepping control mechanism of the conduction band type ink jet printing machine is provided with a proximity switch, a metal detection body and a drive roll rotation angle reading device, the drive roll rotation angle reading device comprises a magnetic grid and a magnetic grid double reading head, the magnetic grid double reading head comprises a first magnetic grid reading head and a second magnetic grid reading head, the magnetic grid is arranged on the drive roll in a surrounding way, the connection part of the two ends of the magnetic grid is a magnetic grid interface, the proximity switch is matched with the metal detection body, the proximity switch is used for detecting whether the magnetic grid interface is close to a certain magnetic grid reading head and whether the magnetic grid interface is just away from the certain magnetic grid reading head, the time period from the proximity switch to the metal detection body leaving signal covers the conversion time period of the magnetic grid reading head and is earlier than the time from. The application also comprises a control method of the conduction band stepping control mechanism. The printing device is simple in structure, convenient to use, high in printing precision and good in effect.)

1. The utility model provides a conduction band step control mechanism of conduction band formula inkjet printing machine which characterized by: the device comprises a proximity switch, a metal detection body and a drive roll rotation angle reading device, wherein the drive roll rotation angle reading device comprises a magnetic grid and a magnetic grid double reading head, the magnetic grid double reading head consists of a first magnetic grid reading head and a second magnetic grid reading head, the magnetic grid is arranged on a drive roll in a surrounding mode, a magnetic grid interface is arranged at the joint of the two ends of the magnetic grid, the proximity switch is matched with the metal detection body arranged on the drive roll, the proximity switch is used for detecting whether the magnetic grid interface is close to one magnetic grid reading head or not and whether the magnetic grid interface just leaves one magnetic grid reading head or not, and the time period from the approach signal of the metal detection body to the departure signal of the metal detection body, which is detected by the proximity switch, covers the conversion time period of the magnetic grid reading head and.

2. The conduction band stepping control mechanism of the conduction band type ink jet printing machine according to claim 1, wherein: the proximity switch comprises a detection piece and a proximity switch circuit, the detection piece is connected with the proximity switch circuit, the detection piece is matched with the metal detection body, and the radian width of the detection piece relative to the driving roller is not less than the radian corresponding to the switching position of the magnetic grid reading head and less than the radian corresponding to the position of the magnetic grid interface close to the main magnetic grid reading head to the position of the auxiliary magnetic grid reading head.

3. The tape-guiding stepping control mechanism of the tape-guiding inkjet printing machine according to claim 1 or 2, wherein: the magnetic grid double-reading head is connected with the magnetic grid double-reading head, the proximity switch and the driving roll driving device.

4. The tape-guiding stepping control mechanism of the tape-guiding inkjet printing machine according to claim 1 or 2, wherein: the driving roll is installed on a bearing seat through a bearing, the bearing seat is installed on a rack, a double-reading-head bracket and a proximity switch bracket are arranged on the rack or the bearing seat, the magnetic grid double-reading head is installed on the double-reading-head bracket, and the proximity switch is installed on the proximity switch bracket.

5. The method for controlling the belt stepping control mechanism of the belt-type inkjet printing machine according to any one of claims 1 to 4, comprising the steps of:

S1 preparation step;

s2, starting the driving roller, and calculating the rotation angle of the driving roller by adopting the main magnetic grid reading head;

s3, when the metal detection body rotates to a position close to a certain side of the proximity switch detection piece, the controller stops the main magnetic grid reading head to calculate the rotation angle of the driving roller, and the auxiliary magnetic grid reading head is adopted to calculate the rotation angle of the driving roller;

s4 the metal detecting body rotates to the position close to the other side of the proximity switch detecting piece, the controller adds the driving roller rotating angle calculated by the auxiliary magnetic grid reading head and the driving roller rotating angle originally calculated by the main magnetic grid reading head to obtain the adjusted driving roller rotating angle, meanwhile, the main magnetic grid reading head is adopted again to calculate the driving roller rotating angle, the driving roller rotating angle calculated by the auxiliary magnetic grid reading head is reset, and the step S3 is turned;

and stopping the machine whenever the rotation angle of the driving roller calculated by the main magnetic grid reading head and the rotation angle of the driving roller calculated by the auxiliary magnetic grid reading head reach the set total rotation angle of the driving roller, and finishing the set conduction band ink-jet printing work.

6. The method for controlling the stepping control mechanism of the conduction band type ink jet printing machine according to claim 5, wherein: the first magnetic grid reading head is a main magnetic grid reading head, the second magnetic grid reading head is an auxiliary magnetic grid reading head, and the initial position of the magnetic grid interface is positioned behind the auxiliary magnetic grid reading head relative to the rotation direction of the magnetic grid interface.

Technical Field

The application relates to a guide belt stepping control mechanism of a guide belt type ink-jet printing machine and a control method thereof, which are mainly suitable for accurately calculating and controlling the stepping amplitude of a guide belt of the guide belt type ink-jet printing machine.

Background

The current commonly used ways for controlling the stepping amount of the conduction band by the conduction band type ink-jet printing machine mainly comprise the following three ways:

one is to convert the number of rotation turns of the servo motor into the stepping amount of the guide belt, and when the servo motor detects that the guide belt reaches the set stepping amount, the servo motor automatically stops and the guide belt stops advancing. Because the calculation of the self rotation number of turns of the servo motor has a certain degree of error, the actual stepping amount of the conduction band is difficult to accurately control, the cloth moving precision error of the jet printing medium is caused, the printing effect of the conduction band type ink-jet printing machine is finally influenced, and especially the printing requirement of the high-precision conduction band type ink-jet printing machine is difficult to meet.

The second method for calculating the step amount of the conduction band is to adopt an image processing device and a digital camera, and the step amount is shot by the digital camera, so that the method is complex in operation and structure, and is not beneficial to improving the production efficiency of the printing machine.

A third method of calculating the step amount of the conduction band is to use a position sensor that detects the amount of movement of the clamping device following the movement of the conduction band to obtain the amount of movement of the conduction band, which has disadvantages in that the conduction band may be deformed, which may affect the accuracy of ink jet printing, and the method is relatively complicated.

Disclosure of Invention

The technical problem solved by the application is to overcome the defects in the prior art, and provide the guide belt stepping control mechanism of the guide belt type ink jet printing machine and the control method thereof, wherein the guide belt stepping control mechanism is simple in structure, convenient to use, low in cost and good in effect.

The technical scheme adopted by the application for solving the technical problems comprises the following steps: the utility model provides a conduction band step control mechanism of conduction band formula inkjet printing machine which characterized by: the device comprises a proximity switch, a metal detection body and a drive roll rotation angle reading device, wherein the drive roll rotation angle reading device comprises a magnetic grid and a magnetic grid double reading head, the magnetic grid double reading head consists of a first magnetic grid reading head and a second magnetic grid reading head, the magnetic grid is arranged on a drive roll in a surrounding way, a magnetic grid interface is arranged at the joint of two ends of the magnetic grid, the proximity switch is matched with the metal detection body arranged on the drive roll, the proximity switch is used for detecting whether the magnetic grid interface is close to a certain magnetic grid reading head or not and whether the magnetic grid interface just leaves a certain magnetic grid reading head or not, the time period from the proximity switch to the metal detection body leaving signal of the metal detection body covers (comprises) the time period from the magnetic grid interface being close to the certain magnetic grid reading head to just leaving the magnetic grid reading head (the magnetic grid reading head conversion time period) and is earlier than the time, in other words, the time period from the approach switch detecting the metal detection body approach signal to the metal detection body departure signal approximately corresponds to the time period from the approach of the magnetic grid interface to the approach of one magnetic grid reading head to the approach of the magnetic grid interface to the approach of the magnetic grid reading head which just leaves one magnetic grid reading head but does not rotate to the other magnetic grid reading head (the accuracy is not required, and the controller is ensured to have time to complete the switching of the two magnetic grid reading heads).

This application the drive roll passes through the bearing and installs on the bearing frame, and the bearing frame is installed in the frame, sets up two readheads support, proximity switch support on frame or the bearing frame, and the two readheads of magnetic grid are installed on two readheads support, and proximity switch installs on the proximity switch support.

Proximity switch is including surveying piece and proximity switch circuit, surveys piece and proximity switch circuit connection, and proximity switch circuit is connected with the controller, survey piece and metal and detect body cooperation, survey the piece and not less than the radian that the magnetic grid read head switched position corresponds and be less than the radian that the magnetic grid interface is close the position of main magnetic grid read head to the radian that the position of assisting the magnetic grid read head corresponds (set to initial magnetic grid interface and rotate first to main magnetic grid read head then rotate to assisting the magnetic grid read head when starting, the meaning guarantees that the piece of surveying sends and is close main magnetic grid read head and leave two signal time of main magnetic grid read head and satisfy main magnetic grid read head switching required time and be earlier than the magnetic grid interface and be close the time of assisting the magnetic grid read head).

The magnetic grid double-reading head controller is further provided with a controller, the controller is connected with the magnetic grid double-reading head, the proximity switch and the driving roll driving device, the controller obtains two signals that the magnetic grid interface is to rotate to the main magnetic grid reading head and just leaves the main magnetic grid reading head through the proximity switch, and the controller avoids the driving roll rotation angle reading error possibly caused by the magnetic grid interface through the magnetic grid double-reading head.

The technical scheme that this application solved above-mentioned technical problem and adopted still includes: a control method of a conduction band stepping control mechanism of a conduction band type ink-jet printing machine is characterized by comprising the following steps:

s1 preparation step (conventional electrical, material preparation, initialization-including printing parameter setting, total rotation angle of drive roller, which magnetic grating reading head is used as main magnetic grating reading head, etc.);

s2, starting the driving roller, and calculating the rotation angle of the driving roller by adopting the main magnetic grid reading head;

s3, when the metal detection body rotates to a position close to a certain side of the proximity switch detection piece, the controller stops the main magnetic grid reading head to calculate the rotation angle of the driving roller, and the auxiliary magnetic grid reading head is adopted to calculate the rotation angle of the driving roller;

s4 the metal detecting body rotates to the position close to the other side of the proximity switch detecting piece (the metal detecting body just leaves the position of the proximity switch), the controller adds the rotation angle of the driving roller calculated by the auxiliary magnetic grid reading head and the rotation angle of the driving roller originally calculated by the main magnetic grid reading head to obtain the rotation angle of the driving roller after adjustment, meanwhile, the main magnetic grid reading head is adopted again to calculate the rotation angle of the driving roller, the rotation angle of the driving roller calculated by the auxiliary magnetic grid reading head is reset, and the step S3 is turned;

and stopping the printing machine at any time (in the steps S3 and S4) when the rotation angle of the driving roller calculated by the main magnetic grating read head and the rotation angle of the driving roller calculated by the auxiliary magnetic grating read head reach the set total rotation angle of the driving roller, and finishing the set conduction band ink-jet printing work.

Since the total rotation angle of the drive roll directly corresponds to the movement amplitude of the conduction band (according to the arc length formula, the movement amplitude of the conduction band = the total rotation angle of the drive roll x the circumferential ratio x the radius of the drive roll/180), the movement amplitude of the conduction band (i.e. the printing length) in the printing parameter setting can be directly converted into the total rotation angle of the drive roll to serve as a signal for completing printing, and thus, the ink-jet printing work can be accurately controlled.

According to the magnetic grating reading head, the first magnetic grating reading head is a main magnetic grating reading head, the second magnetic grating reading head is an auxiliary magnetic grating reading head, and the initial position of the magnetic grating interface is located behind the auxiliary magnetic grating reading head relative to the rotation direction of the magnetic grating interface (namely the main magnetic grating reading head is rotated first after the driving roller is started).

Compared with the prior art, the application has the following advantages and effects: the structure is succinct, convenient to use, and it is high to print the precision, and is effectual.

Drawings

FIG. 1 is a schematic diagram of an application of a stepping calculation mechanism of a conduction band inkjet printing machine according to an embodiment of the present application.

Fig. 2 is an enlarged schematic view at D of fig. 1.

Fig. 3 is an enlarged schematic view at F of fig. 1.

Fig. 4 is a schematic diagram of finding two switching time points (time periods) of the magnetic grating reading head by a proximity switch according to the embodiment of the present application.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings by way of examples, which are illustrative of the present application and are not limited to the following examples.

Referring to fig. 1-4, conduction-band inkjet printing machine has prior art's conduction band 1, driving roller device 2, frame 3, driving roller device 2 includes drive roll 21, drive roll drive arrangement 22 (servo motor is adopted to the special case) and driven rod, driving roller device 2 is installed in frame 3, 1 suit of conduction band is between drive roll 21, the driven rod, drive roll drive arrangement 22 is connected with drive roll 21, its work of drive control, thereby it follows work to drive conduction band 1, this application improvement part is: the proximity switch bracket 11 is arranged on the frame 1 at one side of the driving roller 21, the proximity switch 4 is arranged on the proximity switch bracket 11, and the proximity switch 4 is used for detecting the approximate angle of the driving roller 21 (whether the magnetic grid interface 511 is close to a certain magnetic grid reading head, and whether the magnetic grid interface 511 is just away from the magnetic grid reading head). The device is further provided with a drive roll rotation angle reading device 5, the drive roll rotation angle reading device 5 comprises a magnetic grid 51 and a magnetic grid double reading head 52, the magnetic grid double reading head 52 is composed of a first magnetic grid reading head 521 and a second magnetic grid reading head 522, the magnetic grid 51 is installed on the drive roll 21 in a surrounding mode, and a magnetic grid interface 511 is arranged at the connection position of the two ends of the magnetic grid 51. Since the rotation angle of the driving roll 21 calculated by the magnetic grid 51 has a small deviation at the corresponding magnetic grid interface 511 (not exceeding the included angle of the magnetic grid interface 511) inevitably, the approach switch 4 is required to detect whether the magnetic grid interface 511 on the driving roll 21 approaches a certain magnetic grid reading head (for example, the first magnetic grid reading head 521, which is the main magnetic grid reading head at this time) and whether the magnetic grid interface 511 just leaves another magnetic grid reading head (for example, the second magnetic grid reading head 522, which is the auxiliary magnetic grid reading head), so that in most cases, the rotation angle of the driving roll 21 is calculated by using one magnetic grid reading head, and when the magnetic grid interface 511 approaches a certain magnetic grid reading head, the rotation angle of the driving roll 21 is calculated by actively switching to using another magnetic grid reading head, until the magnetic grid interface 511 determines to leave a certain magnetic grid reading head, the rotation angle of the driving roll 21 is calculated by switching to using another magnetic grid reading head, that is, when the magnetic grid interface 511 is close to the main magnetic grid reading head, another magnetic grid reading head is used to calculate the rotation angle of the driving roll 21, and then when the magnetic grid interface 511 leaves the main magnetic grid reading head, the main magnetic grid reading head is used to calculate the rotation angle of the driving roll 21, thereby perfectly avoiding the detection error of the rotation angle of the driving roll 21 at the magnetic grid interface 511. Of course, which grating reading head is adopted as the main grating reading head can be set according to actual conditions, and the working principle is the same.

The frame 1 of the present application is further provided with a bearing seat 12 for mounting the driving roll 21 and a double-read-head bracket 13 for mounting the magnetic grid double-read head 52.

The proximity switch 4 (magnetic grating read head switching sensor) described in this application comprises a detection piece 41 and a proximity switch circuit, which is prior art. The time period from the approach switch 4 detecting the approach signal of the metal detector 42 to the exit signal of the metal detector 42 covers the time period from the approach of one of the magnetic grating heads to the just-away magnetic grating head by the magnetic grating interface 511 and is earlier than the time period from the approach of the other magnetic grating head to the magnetic grating interface. Referring to fig. 4, assuming that the driving roll 21 rotates clockwise, the first grating reading head 521 is a main grating reading head, the first grating interface 511 is located after being definitely away from the 511' position of the first grating reading head 521 (after referring to the rotation direction) but not reaching the 511 position shown in fig. 4, the rotation angle of the driving roll 21 is calculated by the first grating reading head 521 after the driving roll 21 is started, when the driving roll 21 rotates so that the grating interface 511 rotates clockwise to the position shown in fig. 4, the metal detection body 42 mounted on the driving roll 21 rotates synchronously to the position where the detection piece 41 of the proximity switch 4 is just right or the proximity signal of the metal detection body 42 has been detected, that is, the time when the metal detection body 42 rotates clockwise to the position above the proximity detection piece 41 shown in fig. 2 causes the proximity switch circuit to obtain the proximity signal is not later than the time when the grating interface 511 approaches the first grating reading head 521, the proximity switch circuit detects the proximity signal, and at this time, the magnetic grid interface 511 is just close to but not rotated to the position of the first magnetic grid reading head 521, and the proximity switch 4 is connected to the controller of the prior art, so that the controller receives the proximity signal and records the rotation angle counted by the first magnetic grid reading head 521 (the rotation angle from the initial position of the magnetic grid interface 511 to the position indicated by the arrow 511), and simultaneously starts the second magnetic grid reading head 522 to count the time from this time (the position indicated by the arrow 511) to the time when the metal detection body 42 continues to rotate clockwise to leave the detection piece 41 of the proximity switch 4 positively (for example, the position indicated by the arrow 511' shown in fig. 4, that is, the metal detection body 42 continues to rotate clockwise from above the detection piece 41 to leave from below the detection piece 41 and causes the proximity switch circuit to obtain the leaving signal), and when the controller receives the leaving signal, the grating interface 511 has already rotated past the first grating head 521 but has not yet approached the second grating head 522, and the controller records the rotation angle counted by the second grating head 522 (the rotation angle from the position indicated by the arrow 511 clockwise to the position indicated by the arrow 511 '), starts the first grating head 522 to count the rotation angle from this time (the position indicated by the arrow 511') until the metal detection body 42 continues to rotate clockwise to approach the detection piece 41 of the proximity switch 4 again (the position indicated by the arrow 511), and then repeats the above-described steps after the grating interface 511 rotates to the position shown in fig. 4. That is, the rotation angle of the active roll 21 from the initial position to the 511 position shown in fig. 4 of the magnetic grid interface during the first rotation of the active roll 21 is statistically calculated by the main magnetic grid reading head, the rotation angle from the 511 position to the 511 ' position of the arrow is statistically calculated by the auxiliary magnetic grid reading head, the rotation from the 511 ' position to the 511 arrow position of the magnetic grid interface during each subsequent rotation of the active roll 21 is statistically calculated by the main magnetic grid reading head, and the rotation from the 511 arrow position to the 511 ' position of the arrow is statistically calculated by the auxiliary magnetic grid reading head until the preset rotation angle of the active roll 21 is completed. Because the rotation angle of the driving roller 21 accurately corresponds to the moving distance of the conduction band 1 sleeved on the driving roller 21 and the driven roller, the moving distance of the conduction band 1 can be accurately controlled, and the problems that the moving distance of the conduction band 1 is inaccurate or low in efficiency, has deformation and the like possibly caused by the background technology are solved.

The radian width of the detection piece 41 relative to the driving roller 21 (radian between the radian position of one side of the detection piece 41, such as the radian position of the upper side of fig. 2, which causes an approaching signal and the radian position of the lower side of fig. 2, which causes a leaving signal) is not less than the radian corresponding to the position of the grating interface 511, which approaches the first grating reading head 521, and the position of the grating interface 511, which just leaves the first grating reading head 521 (namely, the position indicated by the arrow 511 to the position indicated by the arrow 511', which is called the grating reading head conversion position), and is not more than the radian corresponding to the position of the grating interface 511, which approaches the first grating reading head 521, and the position of the second grating reading head 522.

All simple variations and combinations of the technical features and technical solutions of the present application are considered to fall within the scope of the present application.