HP V8.5 manual Introduction, Plotter Functions and Features, Power supplies

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T H E O R Y O F O P E R A T I O N

5

5.1INTRODUCTION

The V8.5e plotter uses thermal technology to convert data from the host computer into plotted output. Host data enters the plotter main logic circuitry via the data port, and passes through the interface to the data buffer on the main logic board. Control and status signals enter the main logic board at the same time as the parallel data. The microcontroller converts the data from parallel to serial and sends the serial data to the printhead. One horizontal line or scan, consisting of a single row of dots, is plotted. The stepper motor advances the paper for the next scan. This cycle repeats until the plotted or printed image is finished.

5.2PLOTTER FUNCTIONS AND FEATURES

Power supplies

The logic circuitry and printhead of the plotter are powered by a 5 Volt DC output power supply. The thermal printhead and stepper motor are powered by a 24 Volt, 10 Amp DC power supply. Both power supplies feature an auto-switchable input, which adapts to different voltage or frequency inputs.

V8.5eRev2.2.2002

5-1

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Contents V8.5 Thermal Plotter Trademarks Copyright NoticeDisclaimer HaftungsausschlussPage Iii V8.5eRev2.2.2002 Limitation of Liability Contents Operation Appendices MaintenanceV8.5eRev2.2.2002 Media Description General DescriptionAbout this Manual Operation FunctionalSpecification S Media Transport ElectricalInterface Environmental PhysicalUnpacking InstallationMounting and Positioning Media Installation Interface SetupInstalling rolled paper Back Panel Roll paper and film path Opening the plotter Lid Installing fan-fold paper Installing rolled film Spindle blocks E R a T I O N Power Supply PrecautionsControl panel Using the Control PanelControl panel button functions Rev2.2.2002 Changing function settings Control Panel Functions and SettingsDefault Settings TestplotContrast Speed Media Scaling Emulation vertical resolution MenusettingsareF2, F4, F8, tF,PFForm feed length E R a T I O N Bytes per scan Menusettingsare b1, b2, g1, g2, g3, and g4Grayscale media table number Setup headers for programming the V8.5eSA=4B E R a T I O N Byte Line feed Error MessagesFehlermeldungen Plotter Functions and Features Power suppliesIntroduction T I O N Interface timing and signals Stepper motorInterface Data Transfer Clear Minimum data rates Data ratesScan width VerticalresolutionMode signals Print modeThermal Printhead Automatic Head Temperature FeedbackMedia Sensors Film mediaMaintenance I N T E N a N C E Maintenance GuidelinesRegular Maintenance Cleaning the thermal printhead Cleaningtheplatenroller Replacing the fuse Troubleshooting Plotter does not plot ProblemsPlotwithverticalwhitestripes Plot has vertical white stripesPlot is blotchy or faded Plot contrast is weak Plothasblackverticallines SolutionPaper is wrinkling or tearing along one edge Plot is wrong lengthCan’t make changes to control panel settings Plotter has no powerPlot output speed is erratic Bloomingplot Form feed does not stop at top-of-form marks Form feed stops before desired lengthSkewedplot Plot is skewed or unreadableR R a N T Y R R a N T Y C I I T a B L E S Interface Connector PIN Assignment TableB-2. Centronicscablepinoutsstraightthrough Centronics Interface Board Centronics Interface Board Centronics Interface Board