First you need to configure a plotter:

• In AutoCad, Under FILE menu, open the Plotter Manager
• When the Plotter Manager window opens, double click on Add-A-Plotter Wizard
• Select My Computer and click NEXT
• The plotter Model window will open, Under Manufacturer, select Hewlett-Packard
• Under Models select DesignJet 650C - Model 2859B. Click NEXT
• The Import Pcp or Pc2 window will open, just click NEXT
• The PORTS window will open. On the upper right side, select PLOT TO FILE. Click NEXT
• The Plotter Name window will come up. You can leave the name as it is or you can name it something easier for you to remember, like "Dean's Plotter." Click NEXT
• The Plotter has been added to AutoCad now

Next you need to edit the plotter configuration for the device settings to be correct for your output:

• Select FILE menu > Plotter Manager
• In Plotter Manager, double-click the plotter that you just added.
• Select the "Device & Documents Settings"
• Select the plus sign next to "Graphics"
• Select "Vector Graphics." In the resolution & color depths section, choose the color depth drop-down menu and select "255 virtual pens" and select either the color or monochrome button, depending on whether you are going to be using black & white or greyscale output.
• Select "Modify Standard Paper Sizes" (printable area)
• Select the paper size you will be using and click "modify." Custom Paper sizes will be displayed.
• Change all margin settings to 0.00
• Click Finish