Plotter makes a grinding noise.

A.    If while plotting, or on power-up, the plotter makes a grinding noise,
      then check the following:
      
      1.    Remove the media from the plotter.
      
      2.    Turn off the power on the plotter.
      
      3.    Examine the carriage area for any obstructions and/or torn media.
      
      4.    Manually slide the carriage to check for anything that might
            inhibit free movement.
      
      5.    Examine the grit drum roller area for any obstructions and/or
            torn media.
      
      6.    Manually rotate the grit drum roller to check for anything that
            might inhibit free movement.
      
      7.    If no problems are detected, then the servo motors may be
            binding. If it is, then the plotter requires service.