I'm using ACADLT 2012;
I can't see the means by which I can plot proper lineweights to my laserjet. And when I try to plot to pdf file I get the line colors instead of a weighted line.
How do I set up my drawing for correct monchromatic lineweights ?
Modify the plot style table you're using so that every color plots black (or select the monochrome plot style if you have one). RIght now it sounds like the table you're using is plotting each color by Object color. You can also tweak line weight settings in this dialog if you want to as well.