Are the lines really drawn with for instance 0.15mm, or maybe 0.00? Check with modify - properties.
In print preview mode the printing paper should be shown in white on your grey background. Where is it on your screenshot? Did the drawing look positioned right on the print preview? You can nail down the scale with the "fix" button. Is the paper size in current drawing preferences identical with the settings of your printer? Have you really printed on a physical printer or on a virtual (bitmap,pdf) printer (as I see "drilling guide 2.png" on the bottom of the screenshot) ?