JPS58219059A - Controller for printer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention relates to various adjusting members of a printing press, in particular the ink layer thickness distribution and/or the dampening water layer thickness distribution of an offset printing press and/or the stroke of the intermittent rotation of the ink ductor roller. control device with a device for evaluating digital codes of various information which are decisive for the adjustment to be carried out, the adjustment being carried out inter alia by means of a servo motor; be exposed.

Including and using cassette-type devices, the printer can control the ink layer thickness distribution as it is adjusted for the printing press by its control device when carrying out a particular printing process. Some control devices are known in which the respective adjustment values of the adjustment member reservoir are recorded on a magnetic tape, and these data serve for subsequent reprinting. If the respective data stored on these magnetic tape cassettes are read into the control device again after another intermediate printing has been carried out, these data or information will cause each of the adjusting members to adjust the ink layer thickness. adjusted again for distribution,
Thereby no time-consuming tests are required to find the correct adjustment of the ink layer thickness distribution. Magnetic tape cassettes loaded with these data are only suitable for adjusting printing presses on which these data have already been recorded, and in any case are not technically perfect. Equivalent printing machines can only be preconditioned using the same cassette.

The invention provides a control device which is decisive for the adjustments to be carried out in any way, for example by a cable from a large computer, or alternatively by a storage device which is portable by the printer, such as the above-mentioned magnetic tape cassette. The object of the present invention is to create the possibility of making available various information for different printing presses, which can be transmitted by means of a printer.

According to the present invention, this problem is solved because the device for evaluating the digitally coded information has a calculation device, which is sent to the control device, which essentially depends on the bandwidth-wise ink requirement for printing. and/or the calculation device is configured to convert digital information corresponding to the control device into adjustment values of the offset printing press sump connected to the control device. adjustment of the reservoir of an offset printing press, in which digital information characteristic of the adjustment values of a certain predetermined offset printing press (hereinafter referred to as designated printing press) is connected to its control unit, introduced in This is resolved by being configured to convert to a value.

This digital information is technically irreproachable in the value of the surface coverage detected by an optical paper sheet measuring device on the printed sheet or by a plate measuring device on the finished printing plate. In some cases these cannot be used directly as adjustment values and require conversion into adjustment values.

If these digital information are characteristic of the adjustment values of the specified offset printing press mentioned above, these various information of the specified printing press mentioned above may be used directly for the adjustment of that machine. However, for printing presses which are technically different from the specified printing presses, these information are only available after a conversion carried out by a computing device. It is advantageous to configure the calculation device in such a way that it not only allows the calculation of the value of the surface coverage, but also the calculation of information characteristic of its adjustment. In this case, it is necessary to somehow communicate to the computing device what kind of information is to be sent directly to the computing device.

This is an aspect of the invention since such a conversion, which depends on various technical data of the printing press connected to the control device, has to be carried out at least in many different ways depending on the type of printing press. According to US Pat. In the simplest case, such a device can be a switch box in which the switching is effected by a rotary switch or tumbler switch or other actuating device when the control device is connected to the printing press, and by which switching the calculation is performed. The device performs the desired conversions consistent with the particular printing press to which it is connected.

However, it is also within the scope of the present invention that the device described above automatically identifies the type of printing press and controls the computing device accordingly.

The above-mentioned device may or may not operate automatically, but this makes it possible, among other things, to connect its control device with other printing machines in the printing plant if necessary. It is advantageous for

Information about the band-wise ink i-requirements, that is to say about the individual ink requirements in each individual band when carrying out a printing, can be conveyed to this computing device in different ways. .

That is, the digitized information can provide ink requirements for individual bands. Preferably, however, the digitized information contains data about the surface coverage of the individual zones for each ink and, in addition, a declaration about the format to be printed, here especially the print length. is important. Surface coverage is, as is well known, the ratio of the surface to be printed of a certain scarlet printing zone compared to the total surface area of this printing zone. From the value of this surface force zqrage, the required amount of ink is determined taking into account the width of the printing zone and the length of the printing zone, ie, the printing length. Descriptions of formats, especially print lengths, need not necessarily be communicated to this computing device in the same way as surface coverage values; It does not necessarily have to be present on the data carrier containing the surface coverage value, although it is of course highly advantageous to do so for such formats. The description can also be transmitted by the printer directly to the computing device using a keyboard.

An advantage of the invention is that, for simplicity, we will assume that the information is stored on a magnetic tape cassette.
This means that the same information can be evaluated by the control units of different printing presses, since any of these control units can transmit their information to a special printing press that is combined with the corresponding control unit. This is because it is converted against.

During its manufacture, this computer has four rules for converting various data regarding band-wise ink requirements into ink layer thickness distribution and stroke adjustment values for the intermittent rotation of the ink ductor roller through a programming process during its manufacture. The calculations and the index values for the connected printing press or the description of the properties of a given offset printing press can be fed into this computing device together with the description of the properties of the connected printing press again. It's just necessary. Regardless of which printing press is to be adjusted by the data recorded on the magnetic tape, these data are always the same, i.e. standardized, so that these data can be stored on the magnetic tape cassette. This does not necessarily have to be done during the operation of the printing factory in which the printing press is located; the storage of these data can also be done by mechanically measuring the printed documents and determining their value. Calculate from the confirmed measurements the data regarding the above-mentioned band-wise ink requirements and/or the adjustment values of the specified offset printing press sump to be used as a standard reference, which are then stored on magnetic tape. This can also be done by a technical office. It is entirely unnecessary that the specified printing press mentioned above is an actually existing printing press, which in this case is of a hypothetical specific technical nature that is not actually manufactured by any printing press manufacturer. It is also possible to target printing machines with

According to the embodiment described in claim 2, the transmission of various data depending on the actually carried out adjustment, in particular the adjustment of the servo motor, is carried out by the control device. This is carried out in a standardized manner, i.e. the measuring device calculates data characteristic of the band-wise ink demand from the adjustments actually made and the data on the band-wise surface coverage are calculated, inter alia, in the manner described above. In addition, if necessary, data regarding the format is also sent.

In the embodiment described in claim 3 of the invention, on the other hand, if the control device outputs data that in fact depends on the adjustments that have been made, the output of this data is likewise standardized. However, this is done in such a way that the computing device converts these data into adjustment values for the specified offset printing press and sends them out.

The advantages of the two above-mentioned embodiments of the invention are that - the magnetic tape cassette can be used independently of which printing press the data contained on the magnetic tape cassette during operation refer to; This means that the cassette can be used in any other printing press equipped with a control device according to the invention. This exchange of various data important for their preconditioning between different printing presses requires that large-format printed documents be printed only on printing presses intended for such large-format printing. It is understood that as long as it is possible, there are limits.

The specified offset printing press used as the basis for standardization can be the largest machine in a manufacturer's machine program, especially if this covers machines that actually exist. If this is a printing machine that does not belong to the printing machines controlled according to the invention as already mentioned and as proposed according to an embodiment of the invention, the advantage is that its standardization This means that the standard technical data can be maintained even if various modifications are made to the printing press due to advances in technological development.

According to one aspect of the invention, the control device is provided with a device for identifying from the dental information fed in whether this is data characterizing a band-wise ink requirement or an adjustment value for a specified printing press sump. It is being

According to a further aspect of the invention, the control device has a device for recognizing whether it is connected to a sheet-fed printing press or to a web printing press. This is because in conventional web printing presses each ink band is counted in the same way all from one end of the machine, e.g. this is a corner printing unit that prints from the bottom to the top of the web. It is advantageous because it is counted from left to right, regardless of what it is.

In the case of conventional web printing presses, this means that if the printer wishes to make changes to the adjustment of the ink band, for example at the left edge of the printed document, this may occur depending on the printing unit, e.g. It may mean a layer part or a 32nd layer part, so a different way of thinking is required. By the fact that the control recognizes this as a web printing press, it also determines which ink is used for one of the printing units that prints the web from the bottom or from the top. According to the invention, the computing device is able to carry out the bandwidth adjustment correctly, in that it is able to make each adjustment data dependent on the bandwidth of a particular printing unit. Replace mirror-symmetrically.

An embodiment of the invention in which characteristic information about the band-wise ink demand is input from a data storage device into a control device [2] and adjustment value information sent from this control device is stored again in the data storage device. In this case, the adjustment value information can be replaced with the ink requirement information.

The ink requirement information that was originally present on the data carrier includes, for example, four types of printing ink (black, black, etc.).

magenta, cyan, yellow). This is a printing press with only two printing units, which print first with black and cyan inks in the first printing process.

The printer, after the data have been entered into the memory and the control unit has found out from these the adjustment values for the connected machine's sump, can in some cases use his experience to determine these adjustment values. and further changes based on observations of the printing results. If this adjustment value is stored on the magnetic tape and then converted to the specified machine again as described above, it will be rewritten to only the data of the required ink amount corresponding to black and cyan ink, but it is still Information about both inks that are not printed is not written. Therefore, it is possible to selectively rewrite the information contained in the data carrier. The advantage of the above-mentioned configuration is that sometimes the adjustment values detected and stored by an experienced printer can produce the optimum printing result more quickly than the adjustment values determined from the surface requirements by a computing device. The point is that it brings.

When using a portable digital storage device, in particular the known magnetic tape cassette, according to one of the aspects of the invention, this makes the transmission of data very simple and manageable for the printer, and the individual printing It becomes very easy to modify the data.

According to a further aspect of the invention, there is provided a system in which data for adjustment values can be exchanged between a number of technically different offset printing presses as described above. is brought about.

Other features and advantages of the invention will be apparent from the following description of the embodiments of the invention and from the claims. The individual features can be realized individually or in combination in the embodiments of the invention.

When converting data to the printing presses actually used, it is important to note that the same amount of ink per revolution of the plate cylinder is used on the specified printing presses used as the basis for standardization, and also on the printing presses actually used. It is desired to be removed from the vase. In this case, it is desirable that the adjustment of the size of the ink gap, that is, the adjustment of the ink layer thickness distribution, be made as unalterable as possible if non-linearity must be taken into account during the adjustment. In this case, therefore, the conversion is performed so that the stroke of the ink fountain roller becomes an appropriate value as much as possible.

If only one ink band is considered, the stroke of the ink ductor roller can be chosen very small and the size of the ink gap correspondingly large, or the ink gap can be relatively small and the size of the ink gap correspondingly large. Correspondingly, the stroller of the ink ductor roller is relatively large, so that in both cases an equal amount of ink is supplied to the inking unit of the printing press per revolution of the plate cylinder. The corresponding average ink saturation (F'arbs) during printing in surface coverage
) can be produced using one type of ink.

In addition to these extreme adjustment configurations, many intermediate adjustment configurations are possible. However, if the printed product involves a large number of ink bands arranged next to each other, for example 16 or 32 ink bands, and the ink ductor roller is common to all ink bands of a printing unit. Therefore, the stroke of the ink ductor roller or the size of the ink gap cannot generally reach the above-mentioned limit values, and the possibility of such various changes is therefore reduced. From the various possible extreme positions that are possible for each ink swath, the four arithmetic calculations entered into the calculating device determine the extreme position which is possible as a whole if all ink swaths of a printing unit are considered. and then set the ink fountain roller stroke and ink gap size to exceed empirically determined limits for any one band of ink fountain roller stroke or ink gap size. Adjust to prevent this from happening. This device provides an alarm signal if such a limit is approached by a predetermined amount so that the printer can inspect it and then It is advantageous to be arranged in such a way that approaches to such limit values can be reversed and, if possible, countermeasures taken.

Table 1 lists various data of interest from a number of the applicant's printing presses. The last three types HR5
E, HR5U, and HR5J are for web-fed printing presses, and the others are for sheet-fed printing presses. The maximum printing length listed in 2s of Table 1 is the distance calculated by subtracting the width required for mounting the printing plate and the length of the unprinted part of the printing plate in the circumferential direction from the outer circumference of the plate cylinder. corresponds to The ink stripe length listed in the third column is 95% of the maximum possible length. It is given by the rotation angle of the roller. Ink transfer tact is a measure of how often the ink transfer roller makes its pendulum movement between the ink ductor roller and the first roller of that printing unit. The rollers make 0.5 movements per revolution of the machine, or alternatively, make one movement per two revolutions of the machine.

Although the number of ink bands in the fifth column is not very important for the calculation process in question here, in each of the printing machines described by the applicant, this number of ink bands clearly indicates the number of ink fountain rollers. Ink stripe length can be inferred. In this embodiment, the control device therefore includes a device for recognizing the number of ink bands of the connected printing press.

In the embodiment, the largest printing machine, that is, a machine with a maximum printing length of 690 mm HDIQ2, is adopted as the standard reference.

The K (format) column shows the maximum printing length of each printing machine in the above HD.
The ratio of IO2 to the maximum printing length of the printing machine is listed below. The K (printing machine) column is the ink stripe length listed in the third column for the HD102 printing machine multiplied by the machine ink transfer tact of this HD102, and the ink stripe length and ink transfer of each other printing machine. This is the coefficient calculated from the value divided by the product of takt.

A control device according to the invention, which is used, for example, to control a printing press of the MO type, is fed from a magnetic tape cassette with digital values, which are coded as adjustment values in the data language stored in this cassette. Each adjustment value characterizing the stroke of the ink ductor roller is MO In order to be able to use this MO machine, in the case of a printing press, 134
Must be multiplied by a factor of 5.

If the printer has, for example, manually corrected the adjustment values during the printing process and then wants to store these adjustment values again on the magnetic tape, the computing device can calculate these adjustment values in various ways. Divide the position of each ink fountain roller by the number 1.345 before sending it to the fountain roller. In conversion using this coefficient of 1°345, the digital value read from the magnetic tape regarding the ink layer thickness distribution,
That is, the starting point was to use the digital data of the adjustment reservoir of the adjustment cylinder of the ink discharge adjustment plate of each printing unit as is for the adjustment of the adjustment cylinder of the MO printing press without changing it.

Once the control device has been fed from the magnetic tape the ink demand values, in this example the surface coverage values for the individual bands for each ink and a description of the length of the format to be printed. , the calculation device performs the following division process for each ink band: multiply the value of surface coverage by the format length of the format to be printed, and calculate the maximum print length of the HD 102 printing press. 690
Divide by mm. This gives the surface coverage value at which the ink feed rate must be determined for this particular zone in the HD102 press, thereby printing the format on the plate cylinder at the desired ink saturation m+
+ can be done. The possible limits of the stroke of the ink ductor roller and the limits of the ink layer thickness are determined in the manner described above from the values for the individual zones of surface coverage determined by the calculations described above for this HD102 printing press. The stroke of the ink ductor roller and the ink layer thickness are then determined as described above by superimposing those values for all ink bands that have to be considered in the format to be printed. At this stage of the calculation process, the value of the ink ductor roller stroke, which is only valid for the HD'102 printing press, is determined in each case by using the K(press) coefficients listed in the table below. Convert to stroke of Nodame's ink dispenser roller.

The various printing machines listed in Table 1 have essentially the same structure for adjusting the ink layer thickness distribution, namely the adjusting cylinder has a length of 32 mm and is driven by a servo motor. being driven.

The technical characteristics of the ink fountains of all these printing presses are the same except for their width.

A further advantage of the invention is that printing on a sheet-fed printing press can be carried out for printing on a web printing press, and the adjustment data obtained in this case transferred to a magnetic tape cassette. This means that the cassette can be used to adjust the winding paper. (Icho margin)

Claims (12)

[Claims] (1) Implementation of the adjustment of the various adjustment elements of the printing press, in particular the adjustment elements of the ink layer thickness distribution and/or the dampening water layer thickness distribution and/or the ink ductor roller stroke of an offset printing press. A control device comprising a device for evaluating digitally coded information important for the adjustment to be made, the adjustment being carried out inter alia by means of a servomotor, the information evaluation device comprising a computing device, This inputs various digital information into this control device, which essentially corresponds to the band-wide ink requirements of the printing and/or which is characteristic of the various adjustment values of a given offset printing press. Control device as described above, characterized in that it is configured to convert various adjustment values for an offset printing press coupled to the control device. (2) In the device according to claim 1, in which the calculation device is configured to convert the adjustment values into values corresponding to the ink demand in the band before sending them out, a device is provided for transmitting digitally encoded information such that the adjustment is dependent on the
A control device according to claim 1 above. (3) The apparatus according to claim 1, wherein the calculation device is configured to convert the various adjustment values into various adjustment values characteristic of the predetermined printing press before sending out the various adjustment values. 2. A control device as claimed in claim 1, comprising a device for delivering digitally coded information depending on the adjustment actually carried out. (4) A control device as claimed in any of the preceding claims, wherein the specified offset printing press is technically different from the printing press to be coupled to the control device. (5) A control device according to any one of the preceding claims, comprising a device for transmitting technical data suitable for a computing device to a printing press connected thereto. (6) A device according to any of the above claims, comprising a device for identifying from the digital information sent in whether it is a value characterizing the band-based ink requirement or an adjustment value. control device. (7) In the control device according to any one of the above claims, the information characterizing the band-wise ink requirement is replaced with information characteristic of the ink requirement replaced with the adjustment value information. A control device according to any of the preceding claims, wherein adjustment value information input to and sent out from a storage device is stored in the data storage device. . (8) The control device according to any one of the claims above, ' and 1, which is equipped with a device that mirror-symmetrically replaces the various pieces of information sent in corresponding to each band. . (9) A device is provided for checking when the adjustment value determined by the calculation device exceeds a certain pre-given limit value and for sending out a signal in such case. Control equipment listed in any of the sections of the scope. (10) In a system comprising a large number of technically different offset printing presses, each of which is designated with a control device according to any one of the above claims,
System as described above, characterized in that the designated offset printing press has the same technical data for all offset printing presses of this system. 11. The system of claim 9, wherein each offset printing machine of the system has essentially the same structure for adjusting the ink layer thickness distribution. (12) The control device is a portable digital storage device;
A control device or system as claimed in any of the preceding claims, comprising inter alia a device for reading and writing a magnetic tape cassette storage.