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In cases where it is not practical to assume that the web growth is linear across the paper, a nonlinear web growth profile can be created to capture the actual displacements from the base separation. This topic provides nonlinear web growth profile examples for distortions occurring:
Example 1: nonlinear web growth profile-across the webThis web growth profile example uses the same displacement measurements as in Table 1: Displacements from the yellow separation across a grid. It uses plate tower 1 for the black separation, plate tower 2 for the cyan separation, and plate tower 3 for the magenta separation. <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE profile SYSTEM "WebGrowthProfile.dtd"> <profile> <measurePosition x = "1" y = "1" unit = "mm"/> <measureShift x = "1" y = "1" unit = "mm"/> <plate tower="1" side="U"> <xshift x= "-886.8" dx= "-1.38" /> <xshift x= "-584.0" dx= "-.82" /> <xshift x= "-252.0" dx= "-.36" /> <xshift x= "-12.7" dx= ".10" /> <xshift x= "12.7" dx= ".13" /> <xshift x= "315.5" dx= ".64" /> <xshift x= "584.0" dx= ".95" /> <xshift x= "886.8" dx= "1.40" /> </plate> <plate tower="2" side="U"> <xshift x= "-886.8" dx= "-1.04" /> <xshift x= "-584.0" dx= "-.66" /> <xshift x= "-252.0" dx= "-.36" /> <xshift x= "-12.7" dx= ".10" /> <xshift x= "12.7" dx= ".10" /> <xshift x= "315.5" dx= ".30" /> <xshift x= "584.0" dx= ".46" /> <xshift x= "886.8" dx= ".78" /> </plate> <plate tower="3" side="U"> <xshift x= "-886.8" dx= "-.52" /> <xshift x= "-584.0" dx= "-.30" /> <xshift x= "-252.0" dx= "-.08" /> <xshift x= "-12.7" dx= ".10" /> <xshift x= "12.7" dx= ".08" /> <xshift x= "315.5" dx= ".12" /> <xshift x= "584.0" dx= ".23" /> <xshift x= "886.8" dx= ".40" /> </plate> </profile> Note that the xshift element has two attributes: x, which is the horizontal distance across the web; and dx, which is the displacement from the base separation. The profile also specifies how the measurements are spaced along the plate with the measurePosition element, and the measureShift element specifies the units used for the displacement measurements themselves. Example 2: nonlinear web growth profile (across and around the drum)In this example, measurements are made across the drum (on the x axis), and around the drum (on the y axis). Across the drum, measurements are made every 8 inches and displacements are measured in 1-millimeter increments: < measurePosition x = "8" unit = "inch" /> <measureShift x = "1" unit = "mm" /> The x origin (the across-the-drum measurement) is at the centre of the plate, and so the left-hand x coordinates are negative, and the right-hand coordinates are positive. If the plate is 44" wide, and the first measurement is 2" in from the left edge, this left-most x coordinate will be (44/2 - 2) / 8 = -2.5. Because the measurements are spaced by measurePosition, they will have the x coordinates -2.5, -1.5, -0.5, 0.5, 1.5, and 2.5. The displacement, dx, is simply the measured difference between a feature position in the base separation and the "current" separation. The y origin (the around-the-drum measurement) is at the plate's leading edge, and so the y coordinates start from 0 and are always positive, but otherwise, the concept is the same as the across–the-drum measurements. The yshift element has two attributes, y and dy, which specify the y offset and the displacement in the y direction respectively. An example web growth profile with nonlinear web growth in both the x and y directions is shown below: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE profile SYSTEM "WebGrowthProfile.dtd"> <profile> <measurePosition x = "8" y = "2" unit = "inch" /> <measureShift x = "1" y = "1" unit = "mm" /> <plate tower="1" side="U"> <xshift x= "-2.5" dx= "-1.584" /> <xshift x= "-1.5" dx= "-.720" /> <xshift x= "-.5" dx= "-1.544" /> <xshift x= ".5" dx= ".288" /> <xshift x= "1.5" dx= "1.288" /> <xshift x= "2.5" dx= "1.578" /> <yshift y= ".5" dy= "-3.288" /> <yshift y= "1.5" dy= "0" /> <yshift y= "2.5" dy= "-2.578" /> <yshift y= "3.5" dy= "-4" /> <yshift y= "4.5" dy= "-2" /> <yshift y= "5.5" dy= "0" /> <yshift y= "6.5" dy= "-2" /> <yshift y= "7.5" dy= "0" /> </plate> </profile>
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Lorsqu'il n'est pas réaliste de supposer un étirement linéaire de la bande à travers le papier, un profil d'étirement de la bande non linéaire peut être créé pour capturer le déplacement réel par rapport à la sélection de base. Cette rubrique fournit des exemples | Bookmark436_concept4707__ul_44B18E7EF25D | Bookmark436_concept4707__ul_44B18E7EF25D | |||||||||||
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如果假设纸张横向的轮转机延伸误差为线性误差是不切实际的,则可以创建非线性轮转机延伸误差描述文件来捕获相对于基本色版的实际位移。 本主题提供了在下列方向发生的变形的非线性轮转机延伸误差描述文件示例: Anchor | | Bookmark441_concept4707__ul_44B18E7EF25D | Bookmark441_concept4707__ul_44B18E7EF25D | |||||||||||
Anchor | Bookmark441_concept4707__li_57D0D2FE7F08 | Bookmark441_concept4707__li_57D0D2FE7F08 | 轮转机横向||||||||||||
Anchor | Bookmark441_concept4707__li_EE66338E6EA5 | Bookmark441_concept4707__li_EE66338E6EA5 | 在成像鼓的横向和周向||||||||||||
Anchor | Bookmark441_concept4707__section_1D6118A | Bookmark441_concept4707__section_1D6118A | 示例 1:非线性轮转机延伸误差描述文件||||||||||||
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In Fällen, in denen nicht angenommen werden kann, dass die Ausdehnung auf dem Papier linear ist, kann ein nicht lineares Papierausdehnungsprofil erstellt werden, um die tatsächlichen Verschiebungen vom Basisauszug zu erfassen. Dieses Thema enthält nicht lineare Beispiel-Ausdehnungsprofile für folgende Verzerrungstypen: Anchor | | Bookmark343_concept4707__ul_44B18E7EF25D | Bookmark343_concept4707__ul_44B18E7EF25D | ||||||||
Anchor | Bookmark343_concept4707__li_57D0D2FE7F08 | Bookmark343_concept4707__li_EE66338E6EA5 | Bookmark343_concept4707__li_EE66338E6EA5 | In Achsen- und Umfangsrichtung der Trommel||||||||
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Nei casi in cui non conviene ritenere che l'espansione della bobina sia lineare sulla parte trasversale della carta, è possibile creare un profilo di espansione della bobina non lineare per gli spostamenti effettivi dalla selezione di base. Il presente argomento riporta degli esempi di profili di espansione della bobina non lineare per le distorsioni che si verificano: Anchor | | Bookmark426_concept4707__ul_44B18E7EF25D | |||||||||
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En lo casos en los que suponer que la dilatación del papel es lineal en todo el papel no resulte práctico, puede crearse un perfil de dilatación del papel no lineal para capturar los desplazamientos reales con respecto a la separación base. Este tema ofrece ejemplos de perfiles de dilatación del papel no lineal para distorsiones que tienen lugar: Anchor | | Bookmark440_concept4707__ul_44B18E7EF25D | Bookmark440_concept4707__ul_44B18E7EF25D | ||||||||
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