HP V8.5 manual Film media, Media Sensors

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

Film media

When the plotter is set to film mode, the strobe length is increased to accommodate the thicker media. The plot speed is set to

1.0inch per second to allow the longer strobe length and to maintain plot quality.

5.5MEDIA SENSORS

The top-of-form (also known as the “I-mark”) sensor and the media sensor are contained on a media sensor board .

The top-of-form sensor consists of a focused infrared beam and receptor that reacts to black top-of-form marks. The receptor sends a “stop form feed” command to the logic circuitry if a mark stops the beam from reflecting back into the receptor.

The paper sensor consists of an unfocused infrared beam and receptor. If the receptor receives enough reflected light, the receptor sends no command. If the reflected light is below the required level the receptor sends a “media out” command to the logic circuitry and plotting stops. The “no media” indicator is displayed on the control panel.

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V8.5eRev2.2.2002

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Contents V8.5 Thermal Plotter Disclaimer Copyright NoticeTrademarks HaftungsausschlussPage Iii V8.5eRev2.2.2002 Limitation of Liability Contents Operation Maintenance AppendicesV8.5eRev2.2.2002 General Description Media DescriptionAbout this Manual Functional OperationSpecification S Media Transport ElectricalInterface Physical EnvironmentalInstallation UnpackingMounting and Positioning Interface Setup Media InstallationInstalling rolled paper Back Panel Roll paper and film path Opening the plotter Lid Installing fan-fold paper Installing rolled film Spindle blocks Power Supply Precautions E R a T I O NUsing the Control Panel Control panelControl panel button functions Rev2.2.2002 Control Panel Functions and Settings Changing function settingsDefault Settings TestplotContrast Speed Media Scaling Emulation vertical resolution MenusettingsareF2, F4, F8, tF,PFForm feed length E R a T I O N Menusettingsare b1, b2, g1, g2, g3, and g4 Bytes per scanSetup headers for programming the V8.5e Grayscale media table numberSA=4B E R a T I O N Error Messages Byte Line feedFehlermeldungen Plotter Functions and Features Power suppliesIntroduction T I O N Interface timing and signals Stepper motorInterface Data Transfer Clear Data rates Minimum data ratesVerticalresolution Scan widthPrint mode Mode signalsAutomatic Head Temperature Feedback Thermal PrintheadFilm media Media SensorsMaintenance Maintenance Guidelines I N T E N a N C ERegular Maintenance Cleaning the thermal printhead Cleaningtheplatenroller Replacing the fuse Troubleshooting Problems Plotter does not plotPlot has vertical white stripes PlotwithverticalwhitestripesPlot is blotchy or faded Plot contrast is weak Solution PlothasblackverticallinesPlot is wrong length Paper is wrinkling or tearing along one edgePlotter has no power Can’t make changes to control panel settingsPlot output speed is erratic Bloomingplot Form feed stops before desired length Form feed does not stop at top-of-form marksPlot is skewed or unreadable SkewedplotR 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