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    Re: sextant index error test target
    From: Paul Hirose
    Date: 2006 Nov 05, 19:53 -0800

    I wrote:
    > I think it would be easiest to create and print the pattern with a
    > computer. The self-test patterns my inexpensive ink jet printer
    > generates are amazingly crisp; I think it could do a fine job if I knew
    > how to prepare a suitable drawing.
    
    The test target can be drawn with the Paint program that comes free with
    Windows. By watching the x and y readout at the bottom of the screen you
    can accurately position the cursor when drawing or dragging, especially
    if the view is zoomed in. Knowing there were 72 pixels per inch (click
    Image, Attributes), I was able to print parallel lines with spacing
    accurate to better than .01 inch.
    
    It helps to set width and height only a little larger than the pattern.
    That's controlled in the Attributes dialog. Then click File, Page Setup,
    and see that horizontal and vertical centering is enabled. That will
    center your work area on the paper.
    
    If the widest line is not bold enough, use the Rectangle drawing tool,
    then fill the shape with black. After creating one such line, you can
    select it, copy it, and paste it repeatedly.
    
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