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 SYSTEMWebGrowthProfile.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>
Web growth
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