HP Designjet 250c Service Manual - Page 49

Detecting the Lines and Media Edges Line Sensor The line sensor on the cartridge carriage is used to: D Detect the left and right media edges. D Detect and measure lines drawn on media when performing accuracy calibration. D Scan the setup and alignment sheets. 330 350C D Find the platen roller reference mark. Providing Ink Print Cartridges The DesignJet 250C uses the same four print cartridges as does the DesignJet 650C. The DesignJet 350C uses the same three color print cartridges as does the DesignJet 750C and 755CM plotters and the same black cartridge as the DesignJet 650C. The DesignJet 230 and 330 plotters use only the black cartridge which is used in the DesignJet 650C. Distance between Carriage and Media The distance between the carriage and the writing surface can determine image sharpness. As the distance increases, the drop shape and directionality degrade and are more difficult to predict. You can change the distance using the adjusting screw on the carriage. (Details ' chapter 7.) Carriage (Side View) Adjusting Screw Back Slider ÎÎ Beam Cross-section Bail-Lift Engaging Tab Integrated Line Sensor C4699Ć90000 Functional Overview 5Ć7