AutoCad 2014 - Plot scale is slightly off.

      I've run into a scaling issue when plotting patterns at full 1:1 scale.  It appears that my plotter (HP Designjet 110Plus nr) is plotting my 2D drawings at about 99.75% of actual scale so that when I print off a copy to fit to my customers pattern, it will be plotted slightly smaller than it actually is.  As a result, when I forward the drawing to my manufacturer, it is larger than the printed pattern.  Has anyone else encountered this issue?  I have checked to ensure no scaling command is in use (shrink to, fit to, %) and have tried both portrait and landscape settings.  It seems to lose about 1/32" per foot.

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