You can also calibrate a plotter by running the Plotter Configuration Editor on an existing PC3 file for the device you want to calibrate.
AutoCAD compares the actual plotted measurements to the size you specified in the preceding screen and computes the correction needed to accurately calibrate the plotter.
The resulting PMP file is stored in the AutoCAD Drv folder.
AutoCAD plots the text rectangle again. Measure the sides again to verify that the calibration is correct.