Printing system including static eliminator, control method and program thereof

Abstract

It was not possible to easily fine-tune the static elimination bias voltage value stored in the sheet data of the sheets used for printing using a static elimination device. [Solution] The present invention relates to a printing system 1000 having a printing device 100 having a management means 211 for managing sheet data including a first set value for each sheet type, and a static elimination device 200-3a for performing static elimination on sheets printed by the printing device, wherein the static elimination device has a control means for controlling the static elimination process using the first set value of the sheet received from the printing device and a voltage value (S911) of the static elimination bias determined based on a second set value set by the static elimination device.

Description

【Technical Field】 【0001】 The present invention relates to a printing system including a static eliminator for eliminating static electricity from a charged recording medium, a control method therefor, and a program. 【Background Art】 【0002】 A recording medium used in a printing operation (hereinafter typically referred to as a "sheet") is conveyed in a statically charged state due to residual charge in the electrophotographic process or slight friction with a conveyance roller or a guide that occurs during sheet conveyance. Due to this static electricity, the sheets may stick to each other. In addition, it causes a deterioration in the quality of the product due to dust or paper powder adhering to the product. Here, plain paper and the like have a low electrical resistance inherent to the sheet itself, and charges easily move within the paper, so the amount of charge is small. However, a sheet using a synthetic resin (plastic) such as thick paper, synthetic paper, or coated paper has a high electrical resistance inherent to the sheet itself, and charge movement within the paper hardly occurs. Therefore, as a result, sheets such as synthetic paper and coated paper tend to be more easily charged and more likely to retain charges. Also, it is generally known that it is easily affected by the environment, particularly humidity, and in an environment with low humidity, the amount of discharge into the air decreases, making it easier to become statically charged. 【0003】 If post-processing is performed with the sheets stuck together, it affects the alignment processing of the sheets, not only deteriorating the quality of the post-processing, but also inducing JAM due to paper feed failure or conveyance failure during post-processing, which may damage the sheets or the equipment. Therefore, it is desirable to eliminate the static electricity of the sheets after the printing process before performing such post-processing so as not to cause such risks. Therefore, a proposal has been made to cancel the charges charged on the sheet by applying a voltage to a pair of conveyance rollers located downstream in the sheet conveyance direction (Patent Document 1). The static elimination process using a configuration in which voltage is applied to a transport roller (hereinafter referred to as "static elimination roller") cancels out static electricity by applying a charge opposite to the charge on the sheet to the sheet via the static elimination roller. Therefore, static elimination control by the static elimination roller (application of the opposite charge to the sheet to the static elimination roller) must be performed in accordance with the amount of charge on the sheet. In other words, there is an optimal applied voltage value for static elimination depending on the printing environment such as temperature and humidity, and the type of sheet. 【0004】 Furthermore, if static elimination control is performed on the sheet with an inappropriately adjusted applied voltage, it may actually increase the charge, potentially leading to further adhesion of the sheet. Therefore, it is necessary to perform static elimination control using an optimal applied voltage value according to the environment in which it is used and the type of sheet. Therefore, a configuration has been proposed in which a dial-type knob is provided on the printing device or a dedicated post-processing device equipped with a static elimination roller to adjust the applied voltage value to the static elimination roller to the optimal value for the sheet being used. Adjusting the applied voltage using such a hard switch has the advantage of being easy to operate and intuitive to adjust. However, on the other hand, only one applied voltage value can be set for the device, and it was necessary to reset it to the optimal value each time the sheet used for printing was changed. Furthermore, it could not handle printing of output products that mixed different types of sheets with different optimal applied voltage values. 【0005】 Therefore, a method has been proposed in which the optimal applied voltage value for each sheet type is stored as one of the sheet data for that sheet, and when printing, this is read according to the sheet being used, and static elimination control is performed while switching the applied voltage value. This eliminates the trouble of having to readjust the applied voltage value every time the sheet used to create the deliverable is switched. In addition, by reading the applied voltage value stored in the sheet data of the sheet being used each time and switching the setting while printing, it becomes possible to print deliverables that mix different sheet types with different optimal applied voltage values. [Prior art documents] [Patent Documents] 【0006】 [Patent Document 1] Japanese Patent Application Publication No. 11-258881 [Overview of the Initiative] [Problems that the invention aims to solve] 【0007】 However, even when static discharge control is performed by recalling the adjusted applied voltage value stored in the sheet data of the sheet used for printing, there are cases where the finished product becomes more charged than expected. One factor contributing to this is that there may be differences in environmental conditions such as temperature and humidity between the time the optimal applied voltage value is adjusted and the time printing is performed, causing the optimal applied voltage value itself to change. Furthermore, temperature increases inside the printing machine and weather conditions during printing can also have an impact, sometimes leading to similar cases. In such cases, the usual approach is to make minor adjustments to the pre-adjusted applied voltage value before using it for printing. However, when updating values ​​stored in sheet data, it is necessary to search for and select the relevant sheet from a list of sheet types supported by the printing device, and then edit the data via the sheet data modification screen. Furthermore, updates to settings due to transient factors such as temperature changes inside the printing device during printing or weather conditions often require reverting the settings to their original values ​​at a later date, resulting in an overall inconvenient situation. In view of the above issues, the present invention aims to provide a mechanism that allows for easy fine-tuning of the static elimination bias voltage value, which is an adjusted applied voltage value held in the sheet data of a sheet used for printing, using a static elimination device. [Means for solving the problem] 【0008】 The present invention has been made in view of the above problems, and is a printing system comprising a printing apparatus having management means for managing sheet data including a first set value for each sheet type, and a static elimination device for performing static elimination on sheets printed by the printing apparatus, wherein the static elimination device has control means for controlling the static elimination process using the first set value of the sheet received from the printing apparatus and a voltage value of a static elimination bias determined based on a second set value set by the static elimination device. [Effects of the Invention] 【0009】 According to the printing system of the present invention, the voltage value of the static elimination bias held in the sheet data of the sheet used for printing can be easily fine-tuned using a static elimination device. [Brief explanation of the drawing] 【0010】 [Figure 1] Overall system configuration diagram of this embodiment [Figure 2] Block diagram of the printing system [Figure 3] Cross-sectional diagram of the printing system [Figure 4] Diagram of the control panel of a printing device. [Figure 5] Block diagram of the static elimination device [Figure 6] Sheet data setting screen and static elimination bias adjustment screen [Figure 7] Diagram illustrating static elimination process using a static elimination device. [Figure 8] Diagram of the adjustment panel for the static eliminator. [Figure 9A] Flowchart for static elimination process in the printing process of a printing system [Figure 9B] Flowchart of the static elimination process in a static elimination device [Modes for carrying out the invention] 【0011】 The embodiments for carrying out the present invention will be described below with reference to the drawings. Note that the following embodiments do not limit the invention according to the claims, and not all combinations of features described in the embodiments are essential for the solution of the invention. Overall system configuration FIG. 1 shows the simplest configuration of the present embodiment, which includes a printing system 1000 and a client computer 102 (hereinafter referred to as "PC 102"), and they are connected to each other via a network 101. The PC 102 can transmit PDL (Page Description Language) code data, which is a print job, to the printing system 1000 via the network 101. 【0012】 • Printing system Next, the printing system 1000 will be described using the system block diagram of FIG. 2. The printing system 1000 includes a printing device 100, which is the part surrounded by the dotted line in the figure, and a sheet processing device 200. Note that any number of sheet processing devices 200 can be connected to the printing device 100. In the present embodiment, as an example of the printing device 100, an MFP (Multi Function Peripheral) having a plurality of functions such as a copying function and a printer function will be described. However, the printing device 100 may be a single-function printing device having only a copying function or only a printer function. In the present embodiment, as an example, it is assumed that the printing system 1000 includes various constituent elements described below. The printing system 1000 is configured such that the sheet processing for the sheet printed by the printing device 100 can be executed by the sheet processing device 200 connected to the printing device 100. However, it is also possible to configure the printing system 1000 with only the printing device 100 without connecting the sheet processing device 200. The sheet processing device 200 is configured to be communicable with the printing device 100, receive an instruction from the printing device 100, and execute sheet processing as described below. 【0013】 [Printing Device] Next, the details of the hardware configuration of the printing apparatus 100 will be described. The scanner unit 201 reads an image on a document, converts it into image data, and transfers it to other units. The external I / F 202 transmits and receives data to and from other apparatuses connected to the network 101. The printer unit 203 prints an image based on the input image data onto a sheet. The operation unit 204 has a configuration as shown in FIG. 4, and includes a hard key input unit (key input unit) 402 and a touch panel unit 401, and receives instructions from the user via these. The operation unit 204 performs various displays on the touch panel unit 401 included in the operation unit 204. 【0014】 The control unit 205 comprehensively controls the processing and operations of various units included in the printing system 1000. That is, it also controls the operations of the printing apparatus 100 and the sheet processing apparatus 200 connected to the printing apparatus 100. The ROM 207 stores various computer programs executed by the control unit 205. For example, the ROM 207 stores a program for causing the control unit 205 to execute various processes of the flowchart described later, and a display control program necessary for displaying various setting screens described later. Further, the ROM 207 stores a program for the control unit 205 to interpret the PDL code data received from the PC 102 and expand it into raster image data. In addition, the ROM 207 stores a boot sequence, font information, and the like. 【0015】 The RAM 208 stores image data and PDL code data sent from the scanner unit 201 and the external I / F 202, various programs loaded from the ROM 207, and setting information. The RAM 208 also stores information regarding the sheet processing apparatus 200 (information regarding the types and functions of the respective sheet processing apparatuses 200 connected to the printing apparatus 100, etc.). The control unit 205 can use this information regarding the sheet processing apparatus 200 stored in the RAM 208 for control. 【0016】 The HDD (hard disk drive) 209 consists of a hard disk and a drive unit for reading and writing data to the hard disk. The HDD 209 is a large-capacity storage device for storing image data that is input from the scanner unit 201 and compressed by the compression / decompression unit 210. The control unit 205 can print the image data stored in the HDD 209 using the printer unit 203 based on instructions from the user. The HDD 209 can also be used as a spooler, and the control unit 205 can manage PDL code data received from the PC 102 as print jobs and store them in the HDD 209. Furthermore, the control unit 205 can manage the print jobs stored in the HDD 209 and can obtain the number of stored print jobs and the setting information applied to the print jobs. 【0017】 The compression / decompression unit 210 performs compression and decompression operations on image data stored in the RAM 208 and HDD 209 using various compression methods such as JBIG and JPEG. The sheet data management unit 211 manages the control parameters used when printing the sheet, for each sheet type and even for each sheet brand. The control parameters used when printing the sheet include the characteristics of the sheet itself, such as the basis weight, surface properties, and weave direction, as well as the voltage adjustment value during transfer and the applied voltage value during static elimination control. In Figure 2, it is represented as a single block, but the sheet data management unit 211 is actually a database, and the database itself is stored in the HDD 209. 【0018】 <Screen for setting applied voltage> Furthermore, the sheet data management unit 211 has a settings screen for viewing and editing the contents of the database. The settings screen will be described below with reference to Figure 6. The printing system 1000 is configured so that the user can access the settings screen for each sheet via the operation unit 204. Upon receiving this request, the control unit 205 displays the sheet parameter list screen 601 shown in Figure 6(a) on the touch panel 401 of the operation unit 204. The parameter list screen 601 has fields 602 that display each parameter and its current setting value, and each parameter is equipped with a change button that is pressed when changing its setting value. For example, consider the case where the user presses the [Change] button 603 to change the setting value for adjusting the applied voltage value for static elimination (hereinafter referred to as "static elimination bias"). In this case, the control unit 205 displays the static elimination bias adjustment screen 604 shown in Figure 6(b) on the touch panel 401 of the operation unit 204. 【0019】 The static elimination bias adjustment screen 604 has a field 605 that displays the current setting and input buttons 606 for inputting increases or decreases in the setting value. The static elimination bias voltage for the static elimination process performed by the static elimination device 200-3a, described later, can be set on this sheet. In this embodiment, the static elimination bias voltage for the static elimination process set here is not a direct voltage value [kV], but rather an intensity level with a + or - sign set in the range of -50 to 50. In actual operation, for example, a voltage of 0.1 [kV] per +1 is applied to the static elimination roller based on the setting value here. Note that the units and settable ranges of the setting values ​​shown here are merely examples and are not limited to this content. The control unit 205 can access the database via the sheet data management unit 211 and is configured to acquire characteristic information of the sheets used for printing and parameter information used for print control. 【0020】 Printing system hardware configuration Next, the detailed hardware configuration of the printing system 1000 will be explained using Figure 3. Figure 3 is a cross-sectional view of the printing device 100 and the sheet processing device 200 connected to the printing device 100. In this figure, the sheet processing device 200 is configured to include a static eliminator 200-3a and a saddle-stitch binding machine 200-3b. 【0021】 [Printing device] First, let me explain the printing device 100. The automatic document feeder (ADF) 301 separates the stack of documents placed on the stacking surface of the document tray, page by page, starting from the first page, and transports them onto the document glass for scanning by the scanner 302. The scanner 302 reads the image of the document transported on the document glass and converts it into image data using a CCD. The rotating polyhedron mirror (polygon mirror, etc.) 303 receives a light ray, such as laser light, which is modulated according to the image data, and irradiates the photosensitive drum 304 with reflected scanning light via a reflective mirror. 【0022】 The latent image formed on the photosensitive drum 304 by laser light is developed by toner, and the toner image is transferred to the sheet material attached to the transfer drum 305. A full-color image is formed by sequentially performing this series of image formation processes for yellow (Y), magenta (M), cyan (C), and black (K) toners. After four image formation processes, the sheet material on the transfer drum 305 with the full-color image formed is separated by the separation claw 306 and transported to the fuser 308 by the pre-fixing transporter 307. The fuser unit 308 is composed of a combination of rollers and belts, and incorporates a heat source such as a halogen heater to melt and fix the toner on the sheet material onto which the toner image has been transferred, using heat and pressure. The paper discharge flapper 309 is configured to pivot around a pivot axis and defines the direction of conveyance of the sheet material. When the paper discharge flapper 309 is pivoting clockwise in the figure, the sheet material is conveyed straight and discharged outside the machine by the paper discharge roller 310. The control unit 205 controls the printing device 100 to perform single-sided printing through the series of sequences described above. 【0023】 (Double-sided printing) On the other hand, when forming images on both sides of a sheet material, the paper discharge flapper 309 swings counterclockwise in the figure, changing the path of the sheet material downwards and feeding it to the double-sided transport unit. The double-sided transport unit comprises a reversing flapper 311, a reversing roller 312, a reversing guide 313, and a double-sided tray 314. The reversing flapper 311 swings around a pivot axis, defining the transport direction of the sheet material. When processing a double-sided printing job, the control unit 205 controls the reversing flapper 311 to swing the sheet, which has been printed on the first side of the sheet by the printer unit 203, counterclockwise in the figure, and feed it to the reversing guide 313 via the reversing roller 312. Then, with the rear end of the sheet material held by the reversing roller 312, the reversing roller 312 is temporarily stopped, and the reversing flapper 311 continues to swing clockwise in the figure. In addition, the reversing roller 312 is rotated in the opposite direction. 【0024】 This controls the sheet to be switched back and transported, so that the rear and front ends of the sheet are swapped, and then guided to the double-sided tray 314. The sheet material is first loaded into the double-sided tray 314, and then the re-feed roller 315 feeds the sheet material back to the register roller 316. At this time, the sheet material is fed with the side opposite to the first transfer process facing the photosensitive drum. Then, the second image is formed on the second side of the sheet in the same way as described above. After images are formed on both sides of the sheet material, the sheet is discharged from inside the printing device 100 to the outside of the machine via the paper discharge roller 310 after a fixing process. The control unit 205 controls the printing device 100 to perform double-sided printing through this series of sequences. 【0025】 The printing device 100 also has a paper feeding section for storing the sheets required for printing. The paper feeding section includes paper cassettes 317 and 318 (each capable of holding, for example, 500 sheets), a paper deck 319 (each capable of holding, for example, 5000 sheets), and a manual feed tray 320. The paper cassettes 317 and 318 and the paper deck 319 can be used to separately set various sheets of different sizes and materials in each paper feeding section. The manual feed tray 320 can also be used to set various sheets, including special sheets such as OHP sheets. 【0026】 [Static eliminator] Next, the static elimination device 200-3a will be described. The static elimination device 200-3a has a static elimination roller 322 and a pair of rollers. Sheets transported to the static elimination device 200-3a are carried while being held between both rollers, and rough static elimination is performed by the static elimination roller 322. After that, the sheets are transported out of the device by the transport roller 324, and the remaining charge is removed by the ionizer 323. Furthermore, the static elimination device 200-3a has an adjustment panel 325 for adjusting the set value of the voltage applied during the static elimination process. (Voltage setting adjustment panel) Figure 8 shows the adjustment panel 325 for adjusting the voltage setting value. It consists of hardware such as a dial switch 801 for switching the power of the static elimination unit itself on and off, a setting value display unit 802, and a setting value adjustment button 803. By increasing or decreasing the setting value on the display unit 802 using the adjustment button 803, it is possible to adjust the voltage setting value applied during the static elimination process. The adjustment panel 325 may also be a touch panel, displaying a UI as shown in Figure 8, allowing the user to adjust the voltage setting value by operating the UI. The static elimination process in the static elimination device 200-3a will be explained in more detail later using Figure 7. 【0027】 Here, Figure 5 shows a system block diagram of the static elimination device 200-3a. The static elimination device 200-3a also has a control unit 501 separate from the printing device 100. The control unit 501 communicates with the control unit 205 of the printing device 100 shown in Figure 2 via a bus (not shown), and is configured to centrally manage the entire static elimination device 200-3a while receiving information such as the voltage settings applied during the static elimination process. The static elimination processing unit 503 consists of a static elimination roller 322, an ionizer 323, and a voltage application controller 321 for each, and is responsible for static elimination processing on the conveyed sheets. The applied voltage adjustment unit 505 consists of the adjustment panel 325 mentioned earlier and is responsible for receiving requests from the user to adjust the voltage setting value applied during the static elimination process. 【0028】 The control unit 501 then performs static elimination control based on the set value received by the applied voltage adjustment unit 505 and the set value of the applied voltage for the static elimination process received from the control unit 205 of the printing device 100. Specifically, it implements control to apply voltage to the static elimination roller 322 and the ionizer 323 via the voltage application controller 321. The programs for the static elimination process in the static elimination processing unit 503, which are executed by the control unit 501, and the boot program for the static elimination device 200-3a are stored in the ROM 504. The control unit 501 then loads the necessary programs from the ROM 504 into the RAM 502 as needed and executes the control. 【0029】 (Static electricity removal treatment) Here, we will provide an explanation of the static elimination process performed by the static elimination unit 503 using Figure 7. Figure 7 schematically illustrates the process of static elimination by the static elimination device 200-3a on a sheet that has been printed by the printing device 100. Note that the same part numbers are used for parts common to both Figure 3 and Figure 7. First, the sheet 701 is transported via the transport path 700 to the developing and transferring section, which consists of a photosensitive drum 304 and a transfer drum 305, and toner is placed on the sheet 701. The charged toner 702 placed on the sheet 701 is negatively charged, and after being fixed through the fuser 308, the sheet 701 is transported to the static elimination device 200-3a with the print side 703 negatively charged. 【0030】 The static elimination device 200-3a is equipped with a positively charged static elimination roller 322, which applies a positive charge to the negatively charged printing surface 703 through contact elimination by the roller, thereby eliminating the static charge. However, it is anticipated that some negative charges that could not be removed by the static elimination process using the static elimination roller 322, or conversely, positive charges that have been added, may remain on the sheet 705 after it has passed through the static elimination roller. Therefore, the static elimination device 200-3a described in this embodiment is configured to include an ionizer 323 downstream of the static elimination roller 322. The ionizer 323 is a device that generates corona discharge by applying a voltage to electrode needles contained within the device, and uses the ions generated thereby to eliminate static charge. In this way, rough static elimination is performed by the static elimination roller 322, and then the remaining charge is adjusted by the ionizer 323, so that the sheet 707 discharged from the static elimination device 200-3a after static elimination treatment is in a state where static charge has been eliminated. 【0031】 [Saddle-stitch binding machine] Next, we will explain the saddle-stitch binding machine 200-3b. Sheet processing by the saddle-stitch binding machine 200-3b includes, for example, saddle-stitch binding, punching, cutting, shift paper output, folding, stapling, etc. Here, these jobs are referred to as "saddle-stitch binding jobs." When processing a saddle-stitch binding job, the control unit 205 first transports the sheets of the job printed by the printing device 100 to the saddle-stitch binding machine 200-3b, and then the control unit 205 has the saddle-stitch binding machine 200-3b perform the sheet processing for the job. The control unit 205 then has the printed materials of the saddle-stitch binding job, which have been processed by the saddle-stitch binding machine 200-3b, held at the output destination Z of the saddle-stitch binding machine 200-3b. There are multiple output destination candidates for output destination Z. This is because the saddle-stitch binding machine 200-3b can perform multiple types of sheet processing, and this is used when separating the output destination for each type of sheet processing. In this embodiment, the detailed transport procedure for the saddle-stitch binding job is omitted from the explanation. 【0032】 (Printing process) Next, we will explain the process of printing while performing static elimination, using the adjustment value of the static elimination bias, which is the set value of the applied voltage for static elimination set for each sheet, and the voltage setting value of the applied voltage for static elimination treatment set by the user on the adjustment panel 325. First, the overall processing flow of the printing process, including the static elimination process, will be explained using the flowchart in Figure 9A. Steps S901 to S906 of this process are realized when the control unit 205 of the printing device 100 loads the program stored in ROM 207 onto RAM 208 and executes it. Step S907 is realized when the control unit 205 instructs the static elimination device 200-3a to perform the static elimination process, causing the control unit 501 to load the program stored in ROM 504 onto RAM 502 and execute it. In S901, the control unit 205 of the printing device 100 receives print jobs via the network 101 and the external I / F 202. In S902, the control unit 205 interprets the print job settings received in S901 and understands the specified details, such as the number of copies to print, the output destination, and post-processing. In S903, the control unit 205 reads the PDL data for one page from the spooler on the HDD 209 and expands it onto the RAM 208, and also determines the type of sheet to be used for printing that page. In S904, the control unit 205 obtains from the sheet data management unit 211 a set value, which is the adjustment value for the static elimination bias of the sheet data that was set in advance for the sheet confirmed in S903. In S905, the control unit 205 notifies the control unit 501 of the static elimination device 200-3a of the set value, which is the adjustment value of the static elimination bias acquired in S904. In S906, the control unit 205 executes the printing of the page. In S907, the control unit 501, having received notification of the set value, which is the adjustment value for the static elimination bias, from the control unit 205 in S905, centrally controls the static elimination device 200-3a to execute the static elimination process using the determined static elimination bias voltage value for the printed page in S906. Here, the static elimination bias voltage value for the static elimination process is determined from the set value, which is the adjustment value for the static elimination bias for the printed page in S906, and the voltage setting value set by the user on the adjustment panel 325 of the static elimination device 200-3a. 【0033】 (Static electricity removal treatment) Next, the static electricity removal process performed on the sheet in S907 will be explained using Figure 9B. In S908, the control unit 501 of the static elimination device 200-3a receives the set value, which is the adjustment value for the static elimination bias, notified by the control unit 205 in S905. In S909, it is determined whether the set value of the static elimination bias adjustment value received is "0". Here, a set value of "0" for the static elimination bias adjustment means that the static elimination process is not performed. If it is determined that the set value of the static elimination bias adjustment value received is not "0" (i.e., No in S909), the process proceeds to S910. In S910, the control unit 501 of the static elimination device 200-3a acquires information on the voltage setting value set by the user on the adjustment panel 325 via the applied voltage adjustment unit 505. 【0034】 In S911, the control unit 501 of the static elimination device 200-3a controls the static elimination device 200-3a to determine the voltage value of the static elimination bias based on the set value, which is the adjustment value of the static elimination bias received in S908, and the voltage setting value acquired in S910, and to execute the static elimination process. For example, if the set value, which is the adjustment value of the static elimination bias received in S908, is X, and the voltage setting value acquired in S910 is Y, the static elimination bias voltage value is determined by adding the two in the form X + Y, and the control unit controls the device to execute the static elimination process. While we have described an example where the set value, which is the adjustment value for the static elimination bias set for each sheet, and the voltage set value set on the adjustment panel 325 of the static elimination device 200-3a are added in a one-to-one relationship using the same units, this is not the only way to do so. In addition, to make the setting on the adjustment panel 325 have a stronger effect, it is also conceivable to multiply the voltage set value Y obtained in S910 by a predetermined coefficient α of 1 or more, and determine the voltage value used for the static elimination process using the formula X + αY. Conversely, to make the voltage set value on the adjustment panel 325 have a weaker effect, it may be determined using the formula X + βY with a predetermined coefficient β of 1 or less. Furthermore, the transformation is not limited to a linear transformation of X and Y, but may also be a transformation using any function of the variables X and Y. 【0035】 Next, if it is determined that the received static elimination bias adjustment value is "0" (if the answer is Yes in S909), the process proceeds to S912. In S912, the control unit 501 of the static elimination device 200-3a controls the static elimination device 200-3a to prevent it from performing static elimination processing. In this embodiment, we have shown an example where the adjustment value of the static elimination bias received in S908 is "0," which is interpreted as an intention not to perform static elimination processing, and control is performed accordingly. However, it is also possible to provide a setting that clearly indicates that static elimination processing will not be performed and use that setting for control. By implementing this type of control, static elimination can be performed while taking into account a value set by a hardware dial switch in addition to the pre-adjusted applied voltage value. This is expected to improve operability and, consequently, productivity. 【0036】 (Other examples) The present invention can also be realized by supplying a program that implements one or more of the functions of the above-described embodiments to a system or device via a network or storage medium, and by having one or more processors in the computer of that system or device read and execute the program. It can also be realized by a circuit (e.g., an ASIC) that implements one or more functions. 【0037】 This embodiment includes the following configurations, methods, and programs. [Structure 1] A printing system comprising a printing device having a management means for managing sheet data including a first set value for each sheet type, and a static elimination device for performing static elimination on sheets printed by the printing device, The static elimination device has control means for controlling the static elimination process using a static elimination bias voltage value determined based on the first set value of the sheet received from the printing device and a second set value set by the static elimination device. A printing system characterized by the following features. [Structure 2] The second setting value is the voltage setting value of the static elimination bias set by the user in the static elimination device. The printing system according to configuration 1, characterized in that... [Structure 3] The second setting value can be set by the hardware of the static elimination device. A printing system according to configuration 1 or 2, characterized by the above. [Structure 4] The first setting value is an adjustment value for the static elimination bias that has been adjusted for the sheet of sheet data managed by the management means. A printing system according to any one of configurations 1 to 3, characterized by the above. [Composition 5] A printing system according to any one of configurations 1 to 4, characterized in that the voltage value of the static elimination bias is determined by adding the first set value and the second set value. [Composition 6] The control means controls the system so as not to perform static elimination processing if the sheet data managed by the management means contains a setting that static elimination processing should not be performed on the sheet. A printing system according to any one of configurations 1 to 5, characterized by the above. [Composition 7] The setting that no static discharge treatment is performed on the aforementioned sheet is when the first setting value is 0. The printing system according to configuration 6, characterized in that... [Structure 8] A printing system according to any one of configurations 1 to 7, characterized in that the voltage value of the static elimination bias is determined by adding the first set value and the second set value multiplied by a predetermined coefficient. [Method 1] A control method for a printing system comprising a printing device having a management means for managing sheet data including a first set value for each sheet type, and a static elimination device for performing static elimination on sheets printed by the printing device, The static elimination device has a control step that controls the static elimination process using a static elimination bias voltage value determined based on the first set value of the sheet received from the printing device and a second set value set by the static elimination device. A method for controlling a printing system, characterized by the features described above. [Program 1] A program for causing the computer of the printing system to function as one of the means described in any one of configurations 1 to 8. [Explanation of symbols] 【0038】 1000 Printing Systems 100 Printing equipment 200 Sheet Processing Machine 200-3a Static eliminator 205 Control Unit 211 Sheet Data Management Department 325 Adjustment Panel 501 Control Unit 801 Dial switch

Claims

[Claim 1] A printing system comprising a printing device having a management means for managing sheet data including a first set value for each sheet type, and a static elimination device for performing static elimination on sheets printed by the printing device, The static elimination device has control means for controlling the static elimination process using the voltage value of the static elimination bias determined based on the first set value of the sheet received from the printing device and the second set value set by the static elimination device. A printing system characterized by the following features. [Claim 2] The second setting value is the voltage setting value of the static elimination bias set by the user in the static elimination device. The printing system according to feature 1. [Claim 3] The second setting value can be set by the hardware of the static elimination device. The printing system according to feature 2. [Claim 4] The first setting value is an adjustment value for the static elimination bias that has been adjusted for the sheet of sheet data managed by the management means. The printing system according to feature 1. [Claim 5] The printing system according to claim 1, characterized in that the voltage value of the static elimination bias is determined by adding the first set value and the second set value. [Claim 6] The control means controls the system so as not to perform static elimination processing if the sheet data managed by the management means contains a setting that static elimination processing should not be performed on the sheet. The printing system according to feature 1. [Claim 7] The setting that no static discharge treatment is performed on the aforementioned sheet is when the first setting value is 0. The printing system according to claim 6. [Claim 8] The printing system according to claim 1, characterized in that the voltage value of the static elimination bias is determined by adding the first set value and the second set value multiplied by a predetermined coefficient. [Claim 9] A control method for a printing system comprising a printing device having a management means for managing sheet data including a first set value for each sheet type, and a static elimination device for performing static elimination on sheets printed by the printing device, The static elimination device has a control step that controls the static elimination process using a static elimination bias voltage value determined based on the first set value of the sheet received from the printing device and a second set value set by the static elimination device. A method for controlling a printing system, characterized by the features described above. [Claim 10] A program for causing the computer of the printing system to function as one of the means described in any one of claims 1 to 8.

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