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CA 92127 · 1899
1982. 1986 by Hewlett-Packard Company
16399 W. Bern.rdo Drive. San Diego.


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   Summary of Contents for HP 7470A

  • Page 1

    OPERATOR'S 7470A Plotter aphics MANUAL CA 92127 · 1899 1982. 1986 by Hewlett-Packard Company 16399 W. Bern.rdo Drive. San Diego.

  • Page 2

    NOTICE wiib­ The information CODtained in this dOClll ll eD t is nbject to change out notice. PRINTING HISTORY First EdjtiOll Much 1982 Revision to First F.djtion .laly 1982 1986 ChaDge Sheet to Second Edition Third EditiOll Augut 1986...

  • Page 3

    15.838) The United States Federal Communications Commission 47 CFR has specified that the following notice brought to the attention of users of this product. FEDERAL COMMUNICATIONS COMMISSION RADIO FREQUENCY INTERFERENCE STATEMENT "This equipment generates and uses radio frequency energy and if not installed and used properly, that is, in strict accordance with the manufacturer's instructions, may cause interference to radio and television reception, It has been type tested and found to...

  • Page 4

    If this product was purchased as part of an HP system in a coordinated shipment or as a system arran add-on. it is w ted against defects in material and workmanship during the same period as system.

  • Page 5: Table Of Contents

    What Is a Program? ..• What Programming Languages Do Use? HP-GL (Hewlett-Packard Graphics Language) ..• The Plotter Coordinate System ..

  • Page 6: Understanding Manual Conventions

    Carefully inspect the plotter and a o ries for ccess and Support Office or authorized HP dealer and file a claim with the any physical damage sustained in transit. Notify the nearest HP Sales carrier if the unit is received in a damaged condition.

  • Page 7: Accessories Supplied

    Accessories Supplied The following items supplied with each 7470A plotter: Item Quantity Number Part Operator's Manual 07470-90002 Interconnection Guide 07470-9000 3 Progr e r's Reference Card 07470-9000 4 Interfacing and Programming 07470-9000 1 Manual Assorted pen and media samples *HP-IL cable, 112 metre...

  • Page 8: Input Power Setup

    Consumption: 25 Watts maximum Line Voltage Selection The 7470A is shipped from the factory with the line voltage set to the nominal value for the area specified as the shipment's destination. The voltage selected for the plotter identified in the recessed window on the rear panel.

  • Page 9: Grounding Requirements

    Fuses and fuse caps appropriate to the plotter shipment desti­ nation are installed at the factory. U.S. fuses are inches and use HP 2110-0565 fuse caps. European fuses are 5 X 20 millimetres and use HP 2110'()567 fuse caps .•...

  • Page 10

    For ule in Canada. Japan, Mexico. Philippine.. Taiwan, UL approved. in Unit.ed StatH. HEMA 6o!SI' HP Part. Number 8120-0698; 250 V. 15 A. 1. piu, rating. For ule in Canada, UL approved in United • Statel. SI\! 1011 HP Part Number 8120-2104;...

  • Page 11: Major Feature Locations

    The following paragraphs explain major feature locations and control functions. Major Feature Locations The following illustration shows the locations of the major operating features. The pen holder is shown at its power-up position near the right limit of the drawing range. A pen stall is at each end of the pen carriage arm.

  • Page 12: Control Functions

    The pinch wheels and grit-covered drive wheels that move the paper back and forth across the platen are spaced to accommodate either ANSI A or ISO A4 size media. The paper loading lever which raises and lowers the pinch wheels is located on the left side of the platen. The operating controls and error indicator are grouped on the front panel at the right side of the plotter.

  • Page 13

    FRONT PANEL REAR PANEL RS.232-C/CCITT V.24 (12-161 Hp·IS (20.211 Hp·IL Operator Controls...

  • Page 14

    X- and Y­ ENTER coordinates and the pen status (up or down) are stored and will be sent to the computer after receipt of the HP-GL command OD. In­ structions for digitizing are contained in the Interfacing and Programming Manual. Pressing...

  • Page 15

    They can be used in conjunction with the arrow push buttons to draw lines or to digiti2e a point. During program execution, pressing equivalent to executing an Hp·GL DOWN command PU or PD. When pressed and held down, the pushbutton will override pro·...

  • Page 16

    When the light is blinking brightly, it indi­ cates the plotter has detected an I/O error or an HP-GL error for which the error mask has been set. For a description of errors, refer to instructions IM, OE, and the Interfacing and Programming Manual.

  • Page 17

    (direct connect envi­ ronment). In this position, the plotter powers­ The plotter will respond to all HP·GL and up in the programmed "on" operating state. Z plotter "off" commands.

  • Page 18

    External 1200 2400 4800 9600 Option 002 (HP-IB) This 24-pin HP-IB connector is used to inter­ e-pl connect th otter to a host computer or other HP-IS device. This rocker switch is used to establish maxi­ mum plotting limits. The position is for 81h X 11 inch paper;...

  • Page 19

    all data transmitted on the bus. In listen-only mode the plotter cannot be placed in a talker· active state and will not respond to a serial or parallel poll. NOTE: Listen-only mode is not compatible with most software packages and plotter ROMs .•...

  • Page 20: Setting Up The Plotter

    Option 003 (HP-IL) These two HP-IL connectors are used to inter­ connect the plotter in the HP-IL loop. 8'12 This rocker switch is used to establish maxi­ mum plotting limits. The position is for is for 210 X 297 milli­...

  • Page 21

    points PI and P2, to their default conditions (conditions assumed by the plotter in the absence of an actual instruction). Apply power plotter as follows: 1. Using the power cord supplied, connect the plotter to a grounded (three-wire) ac outlet. CAUTION To prevent possible damage, ensure the plotter properly configured for the line voltage in your area.

  • Page 22: Loading Paper

    Loading Paper This plotter designed be used with HP paper and pens. Use of other paper may cause poor line quality. For best results, order papers listed under Accessories Available. To load paper, proceed as follows: 1. Set the switch...

  • Page 23: The Confidence Test

    The Confidence Test The confidence test provides you with a visual indication that the HP 7470A plotter is operating properly. This self·test checks the mechani­ cal and electronic functions of the plotter. It does by selecting alternate pens, moving between scaling points PI and P2, drawing an asterisk with pen 2, and moving 79 spaces along the X-axis.

  • Page 24: Introduction To Programming Languages

    BASIC graphics statements. These statements often simplify puters offers high-level graphics programming statements which we graphics plotting and can be used in place of HP-GL (Hewlett-Packard Graphics Language) instructions. BASIC graphics statements consist of English words that are usually followed by numeric parameters.

  • Page 25

    Graph plotted using HP-GL instructions. 100 PRINTER IS 705 110 PRINT "IP800,500,7000,4200;SP2;" 120 PRINT "SCO,24,0,15" 130 PRINT "TL1.5,0;" 140 PRINT "SI .135, .20" 150 PRINT "PRO,O;" 160 FOR X·O TO 24 170 PRINT .. PDj PAi l ,X," ,OjPU;XTj" 180 IF x>·...

  • Page 26

    Graph plotted using BASIC graphics statements. 100 P L O TTER I S 705 110 LIMIT 0,180,0 , 1 20 120 L O CRTE 10 , 140 , 10 , 90 130 SCRLE 0 , 2 4 ,0,15 RXES 1 , 1 , 0 , 0 150 L O R G 6 160 CSIZE 170 F O R X - O TO...

  • Page 27: Hp-gl (hewlett-packard Graphics Language)

    HP-GL (Hewlett-Packard Graphics Language) HP-GL is the graphics programming language that is actually sent to and understood by the 7470A plotter. HP-GL commands consist of two­ letter mnemonics that are usually followed by numeric parameters. With the exception of certain escape sequence commands which are used for control of interface functions in an RS-232-C/CCITI' V.24...

  • Page 28


  • Page 29: Setting The Scaling Points

    When programming in HP-GL, they are used in When conjunction with the scaling command SC to establish a user-unit coordinate system. programming in BASIC graphics statements, and when using some prepackaged software, they are used to establish software hard·clip plotting limits.

  • Page 30: Squeezing The Scaling Area

    procedure given for setting the scaling points is used to establish the first plotting area. When plotting is completed, the new position for Pl is set for the second plot. P2 moves proportionately and automatically establishes an equal·sized area for the second plot. Preparing Equal·Sized Plots Squeezing the Scaling Area When a scaling area is established within the plotting area, and then...

  • Page 31


  • Page 32: Symptoms And Solutions

    Reset .pl and P2 or return them to their default locations. Default positions are set using HP-GL command IN or IP;, by turning the plot- ter off, then on again, or by performing a front-panel reset.

  • Page 33

    Possible Cause Solution Plotting Does Not Occur Where Expected (Continued) Program has error. Lines may not be drawn where expected due to a pro- gramming error. Check the program listing. Pen Does Not Write Fiber-tip pen is dried out. Prime the pen by manually writing with it until the ink begins flowing from the inter- nal ink supply to the pen tip.

  • Page 34

    Loose paper flbers tend to clog flber pens and thus weaken the line drawn. This problem will occur more often if low quality, non-HP chart paper is used. To minimize pen clog- ging, use the appropriate HP chart paper and avoid exces- sive overwriting.

  • Page 35

    Solution Possible Cause Pen Appears to Skip or Drag (Continued) Skin oil, or other agents that The plotting medium has oil repel ink may be present on on the surface. the medium surf ace. Correct the problem by using a new sheet of medium.

  • Page 36

    Solution Possible Cause Line Width Is Too Narrow or Too Wide Fiber-tip pens broaden with Fiber-tip pen may b e worn down_ use, producing a wider line than when they were new. If a fine line is required, use a new fiber-tip pen which maintains a constant width.

  • Page 37

    Possible Cause Solution Plotter Seems Misregister or "Drift" (Continued) Climatic conditions have Changes in temperature andl changed. or relative humidity during the course of a plot can cause media to stretch or shrink. This change in dimension may look like a misregistered line.

  • Page 38

    Possible Cause Solution Writing Surface Is Rippled, Torn, or Scratched (Continued) Ink has soaked the plot. If many closely spaced lines are drawn on chart paper without sufficient time to dry, the medium may become tear damp and weak. Further draw- the medium.

  • Page 39: Operator Maintenance

    Operator Maintenance There are no operator-serviceable parts inside the HP 7470A plotter. Maintenance which can be performed by the operator is limited to maintaining the appearance of the plotter. other maintenance must be performed by qualified service personnel. Refer to the Shipment paragraph for instructions on how to obtain servicing assistance.

  • Page 40: Pen Stall Cleaning

    A brief description of malfunction symptoms far service personnel. Plots ar any other materials that help illustrate the problem area. d. If purchued through an HP dealer, a copy of the aalee Blip ar other t y cov period.

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