iSys V12 User Manual

www.isys-group.com

V12

User Guide

iSys - The Imaging Systems Group Inc. © Copyright 2010

Rev 003

COPYRIGHT NOTICE

This document is copyrighted by The Imaging Systems Group 2010. No part of this publication may be reproduced, transmitted, transcribed, or stored in a retrieval system of any kind without prior written permission of The Imaging Systems Group.

TRADEMARKS

Centronics is a U.S. registered trademark of Centronics Data Computer Corporation. Versatec is a registered trademark of Versatec Corporation.

DISCLAIMER

The Imaging Systems Group makes no warranties as to the accuracy, validity or fitness for use of the contents of this manual. The Imaging Systems Group reserves the right to revise the information in this manual at any time without notice.

ATTENTION: The V12 plotter generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause interference to radio communications. It has been designed to comply with the requirements for Class A computing devices pursuant to Sub-part J of Part 15 of FCC Rules, which are designed to provide reasonable protection against such interference when operated in a commercial environment. Operation of this equipment in a residential area is likely to cause interference in which case, the user, at their own expense will be required to take whatever measures may be required to correct the interference.

LIMITATION OF LIABILITY

The Imaging Systems Group’s total liability to the purchaser, or to any third party, for damages from any and all causes whatsoever, regardless of the form of action, whether in contract or in tort, including negligence, and any infringement of proprietary rights or any misappropriation or unlawful use of any proprietary rights or property of any third party shall, in the aggregate, be limited to purchase price actually paid by the purchaser for the product relating to the damages.

The limitation of liability provisions of this agreement reflect an informed voluntary allocation of the risks (known and unknown) that may exist in connection with the provisions of the goods and services provided hereunder by The Imaging Systems Group, and that such voluntary risk allocation represents a fundamental part of the agreement reached between The Imaging Systems Group and the purchaser.

The Imaging Systems Group shall not be liable for any special, direct or indirect, incidental, consequential, exemplary, punitive or any similar or other damages of any nature suffered by the purchaser whatsoever including, without limitation, loss of use or lack of availability of the purchaser facilities, including its computer resources and any stored data, loss of profits or revenue, or other commercial loss, or any claim for contribution or indemnity in respect of any claims against the purchaser, regardless of whether The Imaging Systems Group has been advised of the possibility of such damages.

The Imaging Systems Group Inc. 911 28 Street NE

Calgary, Alberta T2A-7X1 Canada Phone [phone] Fax: [phone]

E-mail: [e-mail] http://www.isys-group.com

2

CONTENTS
INTRODUCTION........................................................................................................................................	8
GENERAL DESCRIPTION...................................................................................................................	8
1.1 MEDIA DESCRIPTION .............................................................................................................	8
1.3 ABOUT THIS MANUAL .................................................................................................................	8
SPECIFICATIONS .....................................................................................................................................	9
2.1 FUNCTIONAL..................................................................................................................................	9
Operation............................................................................................................................................	9
Media .................................................................................................................................................	10
Thermal printhead..........................................................................................................................	10
Transport..........................................................................................................................................	10
2.2 ELECTRICAL.................................................................................................................................	10
Interface............................................................................................................................................	10
Power consumption ......................................................................................................................	10
Power requirements ......................................................................................................................	11
2.3 PHYSICAL......................................................................................................................................	11
2.4 ENVIRONMENTAL .......................................................................................................................	11
Temperature ....................................................................................................................................	11
Other..................................................................................................................................................	11
INSTALLATION .......................................................................................................................................	12
3.1 UNPACKING..................................................................................................................................	12
3.2 MOUNTING AND POSITIONING ...............................................................................................	13
3.3 INTERFACE SETUP.....................................................................................................................	13
Changing the interface line setting ...........................................................................................	13
3.4 MEDIA INSTALLATION...............................................................................................................	14
Installing rolled paper ...................................................................................................................	14
Installing fan-fold paper ...............................................................................................................	16
Installing and using film...............................................................................................................	17
Installing the fan-fold feeder tray...............................................................................................	17
OPERATION.............................................................................................................................................	18
4.1 POWER SUPPLY PRECAUTIONS............................................................................................	18
4.2 USING THE CONTROL PANEL.................................................................................................	18
4.3 CONTROL PANEL FUNCTIONS AND SETTINGS ................................................................	19
	3

Changing function settings:........................................................................................................	19
Test mode.........................................................................................................................................	20
Contrast ............................................................................................................................................	20
Speed ................................................................................................................................................	20
Media .................................................................................................................................................	21
Scaling ..............................................................................................................................................	21
Beeper...............................................................................................................................................	21
Form feed length ............................................................................................................................	22
Scan width .......................................................................................................................................	22
Vertical resolution..........................................................................................................................	23
TOF display descriptions.............................................................................................................	23
THEORY OF OPERATION ....................................................................................................................	25
5.1 INTRODUCTION ...........................................................................................................................	25
5.2 PLOTTER FUNCTIONS AND FEATURES...............................................................................	25
Power supply...................................................................................................................................	25
MAINTENANCE AND REPAIR .............................................................................................................	27
6.1 MAINTENANCE GUIDELINES...................................................................................................	27
6.2 REGULAR MAINTENANCE........................................................................................................	28
Cleaning the thermal printhead..................................................................................................	28
Cleaning the platen roller.............................................................................................................	28
Cleaning the Top of Form/Media out sensors ........................................................................	29
6.3 REPAIR PROCEDURES..............................................................................................................	29
Tools..................................................................................................................................................	29
Opening the plotter lid..................................................................................................................	29
Removing the top cover ...............................................................................................................	29
Opening the back panel ...............................................................................................................	29
Removing the side panels ...........................................................................................................	30
Opening the bottom panel ...........................................................................................................	30
Replacing the display board .......................................................................................................	30
Replacing the thermal printhead................................................................................................	30
Adjusting the printhead................................................................................................................	31
Replacing the printhead data cable ..........................................................................................	31
Replacing the drive belt ...............................................................................................................	31
	4

Replacing the gears.......................................................................................................................	32
Replacing the stepper motor ......................................................................................................	32
Replacing the platen roller and bearings ................................................................................	32
Measuring and adjusting 5 V power supply voltage.............................................................	32
Replacing the 5 V power supply ................................................................................................	33
Replacing the Top of Form (TOF) sensor board....................................................................	33
Adjusting the top of form sensor...............................................................................................	34
Replacing the rear cooling fan ...................................................................................................	35
Replacing the bottom cooling fan .............................................................................................	35
Measuring and adjusting 24 Volt power supply voltage .....................................................	35
Replacing the 24 Volt power supply .........................................................................................	36
Replacing the main board............................................................................................................	36
Replacing the capacitor ...............................................................................................................	36
Adjusting the latch pins ...............................................................................................................	37
Replacing the power switch........................................................................................................	37
Replacing the AC receptacle.......................................................................................................	37
Replacing the fuse .........................................................................................................................	38
FIGURES...................................................................................................................................................	39
Figure 7-1. Opening the plotter lid .................................................................................................	39
Figure 7-2. Back panel ....................................................................................................................	40
Figure 7-3. Back panel (open)........................................................................................................	41
Figure 7-4. Bottom view ..................................................................................................................	41
Figure 7-5. Interior side screws......................................................................................................	42
Figure 7-6. Control panel ................................................................................................................	43
Figure 7-7. Display board................................................................................................................	43
Figure 7-8. Right side (display board removed) ..........................................................................	44
Figure 7-9. Printhead spring pins...................................................................................................	45
Figure 7-10. Removing the printhead............................................................................................	45
Figure 7-11. Printhead plate ...........................................................................................................	46
Figure 7-12. Left side (panel removed).........................................................................................	46
Figure 7-13. Gears and belt............................................................................................................	47
Figure 7-14. Bottom view (panels removed) ................................................................................	47
Figure 7-15. Stepper motor (removed) .........................................................................................	48
	5

Figure 7-16. Stepper motor assembly...........................................................................................	48
Figure 7-17. Right side of platen roller..........................................................................................	49
Figure 7-18. 5V power supply terminal block...............................................................................	50
Figure 7-19. 5V power supply ........................................................................................................	51
Figure 7-20. Interior (right side)......................................................................................................	52
Figure 7-21. Top-of-form sensor and media out sensor.............................................................	53
Figure 7-22. TOF/ Media Out Sensor Board and Capacitor......................................................	54
Figure 7-23. Main board..................................................................................................................	55
Figure 7-24. Bottom cooling fan.....................................................................................................	56
7-25. Bottom cooling fan connections...........................................................................................	57
Figure 7-26. Left side data bulkhead.............................................................................................	57
Figure 7-27. Rear viewAC receptacle.........................................................................................	58
Figure 7-28. Main board connections............................................................................................	59
Figure 7-29. Interior and underside of lid assembly....................................................................	60
Figure 7-30. 24V power supply AC terminals (left side).............................................................	61
Figure 7-31. 24V power supply output studs (right side) ...........................................................	62
Figure 7-32. 24V power supply mounting plate...........................................................................	63
Figure 7-33. Printhead connections ..............................................................................................	64
Figure 7-34. Sample test plot .........................................................................................................	65
Figure 7-35. Optional equipment ...................................................................................................	66
Figure 7-36. Head mounting screws .............................................................................................	67
Figure 7-37. Head adjustment screws ..........................................................................................	68
TROUBLESHOOTING............................................................................................................................	69
8.1 INTRODUCTION ...........................................................................................................................	69
8.2 PROBLEMS ...................................................................................................................................	71
Error message displayed: NO MEDIA.......................................................................................	71
Error message displayed: *_HOT!_* .........................................................................................	71
Plotter does not plot......................................................................................................................	71
Plot is blotchy or faded ................................................................................................................	73
Plot contrast is weak.....................................................................................................................	73
Plot has black vertical lines ........................................................................................................	74
Plot is wrong length ......................................................................................................................	74
Paper is wrinkling or tearing along one edge.........................................................................	75
	6

Plotter has no power .....................................................................................................................	75
Plotter display is functioning but motor does not function................................................	75
Changes cannot be made to control panel settings.............................................................	75
Plot output speed is erratic .........................................................................................................	75
Form feed does not stop at top-of-form marks......................................................................	75
Form feed stops before desired length....................................................................................	76
Burning smell during plot, or “blooming” present on output............................................	76
Plot is skewed or unreadable......................................................................................................	77
RACK MOUNT ADDENDUM.............................................................................................................	77
9.1 SPECIFICATIONS ........................................................................................................................	78
PHYSICAL ............................................................................................................................................	78
Dimensions......................................................................................................................................	78
9.2 INSTALLATION.............................................................................................................................	78
Installing the rails...........................................................................................................................	78
Installing the plotter on the rack................................................................................................	80
Changing the interface line setting ...........................................................................................	80
Media installation ...........................................................................................................................	80
9.3 MAINTENANCE AND REPAIR ..................................................................................................	80
Removing the plotter from the rack ..........................................................................................	80
Removing the side panels ...........................................................................................................	81
Opening the back panel ...............................................................................................................	81
Accessing the bottom of the plotter .........................................................................................	81
Cleaning the air filter.....................................................................................................................	81
Replacing the display board .......................................................................................................	82
Replacing the AC receptacle.......................................................................................................	82
Other repair procedures...............................................................................................................	82
10.0 DRIVER INSTALLATION ..........................................................................................................	83
CENTRONICS INTERFACE ..............................................................................................................	92
HARDWARE.........................................................................................................................................	92
ASCII TABLES.....................................................................................................................................	94
TOP-OF-FORM MARKS.....................................................................................................................	95
INTERFACE CONNECTOR PIN ASSIGNMENT ...........................................................................	96
	7

INTRODUCTION

GENERAL DESCRIPTION

The Imaging Systems Group V12 Thermal Plotter is a high-speed plotter suitable for office or field use. Its small size and lightweight, yet rugged construction allows it to be portable. The V12 uses thermal plotting technology, so it requires no chemicals or powdered ink. It is efficiently designed with only two moving parts; the platen roller and the motor.

Interface parameter settings and other menu functions can be accessed from either the front panel or the remote host. It is capable of printing at four speeds: 1.0, 2.0, 3.0 and 4.0 inches per second.

The V12 plots in both raster and character modes, and contains a 96 ASCII character set. It interfaces easily with Versatec and optionally Centronics or SCSI data sources.

1.1 MEDIA DESCRIPTION

The V12 uses roll or fan-fold thermal paper, and certain thermal film media. Media width can be 12 inches, 11.654 inches, or 8.75 inches. The V12 accommodates regular thermal paper, papers with a protective top coating, and thinner field-grade thermal papers, as well as certain types of film media. Call your Imaging Systems Group customer service representative for media recommendations.

A fan-fold paper guide is supplied with the plotter (Figure 3-1). Optional feeder trays are available from The Imaging Systems Group which stabilizes the paper for smooth intake (figure 7-35). This option is useful in field situations, or wherever vibration is a problem. These trays attach to the back of the plotter and are available in two media width.

1.3 ABOUT THIS MANUAL

Please read this manual before using the plotter, in particular the Installation and Operation chapters, and the “Regular Maintenance” section in the Maintenance and Repair chapter.

Please read the Troubleshooting chapter before attempting repairs.

Pay special attention to warnings, cautions and notes. The following conventions are used in this manual:

WARNING: Indicates possible bodily injury if procedure is not followed exactly. CAUTION: Indicates possible equipment damage unless procedure is followed correctly. NOTE: Indicates a general rule for a procedure, or an exception to a rule.

This symbol indicates an area of possible concern due to static discharge into the circuitry. When you see this symbol in the manual, please observe proper static precautions to minimize damage to the circuitry

8

SPECIFICATIONS
2.1 FUNCTIONAL
Operation
Command panel	Top mounted on the desktop version.
	Front mounted on the rackmount version.
	Full function alphanumeric display.
	Four push buttons.
	LED display.
Command modes	Plotting mode.
	Printing mode.
Features	Microprocessor controlled.
	Two custom user settings.
	User settings stored while power off.
	Automatic head temperature feedback.
Panel settings	On-line, off-line.
	User 1 and User 2 custom settings.
	Manual plot speed select: 1.0, 2.0, 3.0 and 4.0 inches per second (ips).
	Manual plot width selection: 216, 216 right justified, 264, 264 right
	justified and 296 bytes per scan (bps).
	Test plot, test print.
	203 dots per inch (dpi) vertical resolution - standard.
	200 dots per inch (dpi) vertical emulation.
	Vertical scaling: From no scale to +30/64” in 1/64” increments.
Media selection:	Light paper, heavy paper, light film, heavy film. 10 Contrast settings: C1,
	C2, C3, C4, C5, C6, C7, C8, C9, C10. Manual form advance. Form feed.
	Form feed length adjust: 1.0, 2.0, 3.0, 4.0, 6.0, 8.0, 10.0, 12.0, 14.0, 16.0
	inches, top of form (TOF) sensing, programmable past top of form
	(PTOF).
	TOF voltage detection.
	Beeper select: On, off, pulsed audible alert.
	24 volt error warning.
	Thermistor error warning.
Plot speeds	1. 1.0 inch per second.
	2. 2.0 inches per second.
	3. 3.0 inches per second.
	4. 4.0 inches per second.
	5. Film mode: 1.0 inch per second.
Condition detection	Media out.
	Top of form.
	Head temperature.
	Idle state power supply shutdown.
	Top of form voltage.
	9

	Media
	Types	Thermal sensitive paper or film. Rolled paper (1 inch spool core), rolled
		paper (7/16 inch spool core), fan-fold paper, rolled film and rolled fanfold.
	Media widths	8.75 inches, 11.65 inches, 12.0 inches.
	Length	Rolls: 200 feet heavy base top coat field grade (thick paper), 300 feet
		(thin paper), 130 feet film. No maximum amount with fan-fold paper.
	Feeder trays	Optional, for fan-fold paper, each width.
	Thermal printhead
	Type	Linear array.
	Resolution	203 dots per inch or 8 dots per millimeter.
	Dots per scan	Dots per scan
	Bytes per scan	296 maximum.
	Image width	11.65 inch maximum (0.25 inch margin for other media widths.
	Transport	Micro-step.
	Stepper motor
	Stepping increment	0.004 millimeter.
		6400 micro-steps per inch of media.
		32 micro-steps per scan line.

2.2 ELECTRICAL

Interface

Type

Compatibility

Parallel with an 8 KB buffer.

Versatec Green sheet standard. Centronics parallel - optional with driver. SCSI - optional with driver.

Optional data	37 pin db male to male.
cables	37 pin db male to female.
	37 pin db female to 57 pin female military.
	25 pin db male to female.
	50 pin micro SCSI male to female.
Power consumption
Idle mode	110	W minimum.
Plot or print mode	415	W maximum.

10

Power requirements
Voltage	Auto selectable input.
	110		Volts AC @ 60	Hertz or
	220		Volts AC @ 50	Hertz.
Current	6 Amps maximum @ 110 Volts.
	2	Amps nominal @ 110 Volts.
	3
Fuse	250		Volts / 6.3 Amps.

2.3 PHYSICAL
Dimensions	Desktop	Rackmount
Height	6.25 inches	5.75 inches
Width	17.0 inches	19.0 inches
Weight	Desktop	Rackmount
Net	28 pounds	40 pounds
2.4 ENVIRONMENTAL
Temperature
Operating range	32º to 122º Fahrenheit / 0º to 50º Celsius.
Storage range	14º to 158ºFahrenheit / -10º to 70º Celsius.
Other
Operating humidity	5% to 95% non-condensing.
Certification	FCC Class “A” verified for electromagnetic interference.
	European CE.

11

INSTALLATION

3.1 UNPACKING

Although shipments are thoroughly checked for completeness by The Imaging Systems Group, please confirm that your plotter has the following:

1.Power cord - North American.

2.Sample roll of paper.

3.Fan-fold paper guide.

4.Two spindle hubs and one spacer (for 11.65 and 12 inch paper), or: spindle and sleeve hub (for 8.75 inch paper) - Options.

Confirm that all specified options are present, such as a data cable or a fan-fold feeder tray.

Inspect the plotter and components for any damage that may have occurred during shipment. Report any damage to the carrier of the shipment, and to your Imaging Systems Group customer service representative.

Keep the box and packaging for future shipping, in the event of servicing or upgrading issues. This product must be returned to our factory in the original or proper packaging material. Damage caused during return shipping or due to improper packaging will not be covered by The Imaging Systems Group. During shipping or storage, place a length of thermal paper between the printhead and roller. This prevents damaged caused by the two components sticking together.

Figure 3-1 . V12 components

12

3.2 MOUNTING AND POSITIONING

Keep the V12 plotter away from direct heat sources, including sunlight. Do not block the vents on the bottom or at the back of the plotter.

The V12 is equipped with rubber feet for absorbing shock in typical situations. Optional vibration-absorbing mounts are available for rugged environments or mobile situations.

3.3 INTERFACE SETUP

Plug the power cord into a grounded AC outlet only. Avoid sharing an outlet that is also powering other noise generating equipment.

The V12 can be set as either short line (TTL; transistor to transistor logic) or long line (differential logic) interface. The plotter is shipped with the Versatec interface set for long line unless otherwise specified. The short line interface can be used for data cable lengths up to 50 feet. The long line interface can be used for data cable lengths up to 700 feet.

For Centronics interface installation, see Appendix A. A SCSI (small computer system interface) is also available. Please contact your Imaging Systems Group customer service representative for further information.

Changing the interface line setting

Figure 3-2. Main board interface connections

1.Open the back panel as described in “Procedures” in Chapter 6, Maintenance and Repair.

2.Locate the ribbon cable on the upper left of the board, as viewed from the front of the plotter.

3.Unplug the cable from its port and plug it into the desired line port as shown in Figure 3-

4.Locate the jumper to the left of the ports. Move the jumper to the desired position as shown in Figure 3-2, matching it to the cable position selection- S or L (Shortline or Longline).

5.Close the back panel and replace the screws.

CAUTION: Do not attempt to plot or form feed without the print medium installed. This may damage the print head and will void the warranty.

13

3.4 MEDIA INSTALLATION

Installing rolled paper

The V12 plotter is shipped with a sample roll of thermal sensitive paper. To install rolled paper:

1.Release the lid assembly by grasping underneath the black latch bar and pulling it upwards (Figure 7-1). Open the plotter lid by lifting it straight upwards.

2.Remove the fan-fold guide by grasping the two stainless steel rails and lifting it straight upwards.

3.Place the spindle hubs onto each end of the roll of media with the 11.65 spacer on the left hand side spindle.

4.Orient the roll so that the paper feeds off of the top of the roll.

5.Place the roll in the plotter so that the pins on the spindle hubs snap into the slots on the spindle blocks.

6.Guide the paper over the blue platen roller and under the black cutter bar as shown in Figure 3-3.

7.Figure 3-4 shows roll paper installed. When installing any media, ensure that the coated side of the media is on top. V12 Rev 2.0.2000

14

Figure 3-4 Roll paper installed

15

Installing fan-fold paper

1.Release the lid assembly by grasping underneath the black latch bar and pulling it upwardsfigure 7-1. Open the plotter lid by lifting it straight upwards.

2.Place the fan-fold guide on the spindle blocks, orienting it so that it slopes towards the front of the plotter. See Figure 3-5.

3.Slide the width bracket on the fan-fold guide to fit the paper you are using. See Figure 3-6

Figure 3-6. Fan-fold feeder tray

4.Feed the fan-fold paper through the slot in the back of the plotter located between the lid and the top of the rear panel.

5.Guide the paper under the rear fan-fold bar and over the top of the front fan-fold bar.

6.Guide the paper over the blue platten roller and under the black cutter bar as shown in Figures 3-7 and 3-8.

CAUTION: Before plotting or testing on any print medium, make sure that the media setting is correct. Incorrect settings may result in damage to the printhead and will void the warranty. The media may also be damaged. See Chapter 4, “Operation” for menu setting instructions.

Figure 3-7. Fan-fold paper path

16

Figure 3-8 Fan-fold paper installed

Installing and using film

To install rolled film:

1.Release the lid assembly by grasping underneath the black latch bar and pulling it upwards (Figure 7-1). Open the plotter lid by lifting it straight upwards.

2.Remove the fan-fold guide by grasping the two stainless steel rails and lifting it straight upwards.

3.Place the spindle hubs onto each end of the roll of media with the 11.65” spacer on the left hand side spindle.

4.Orient the roll so that the film feeds off of the top of the roll.

5.Place the roll in the plotter so that the pins on the spindle hubs snap into the slots on the spindle blocks.

6.Guide the film over the blue platen roller and under the black cutter bar shown in Figure 3-3.

7.Figure 3-4 shows rolled media installed. When installing any media, ensure that the coated side of the media is on top.

NOTE: The cutter bar does not cut film. Use a knife or scissors.

Installing the fan-fold feeder tray

Install the optional fan-fold feeder tray by sliding the bracket holes over the bolts on the back of the plotter.

17

OPERATION

4.1 POWER SUPPLY PRECAUTIONS

Turn the plotter power switch OFF before doing any of the following:

1.Unplugging the plotter.

2.Cleaning the printhead.

3.Opening the plotter for maintenance or service.

4.Placing hands or tools near any internal parts.

WARNING: There are voltage hazards inherent in the printhead power supply and AC input wiring. Take reasonable precautions to avoid electrical shock.

CAUTION: Take care not to discharge static into the plotter. This may cause damage to the integrated circuits or to other electronic components. Use an approved method of static dissipation such as touching a grounded source, to prevent component damage.

4.2 USING THE CONTROL PANEL

To turn the plotter on, press the main power switch located at the back right side of the desktop plotter version, or at the front left side with the rackmount version. The display will show IDLE M1 and the ONLINE light will be illuminated. When the ONLINE light is on, the plotter is ready to receive data from the host. Changes to the control panel settings must be made in OFFLINE mode.

The control panel is shown in Figure 4-1. It consists of an LED display, three condition lights, and four push buttons.

Figure 4-1. Control panel

18

	BUTTON		FUNCTION
	ON/OFF LINE		Toggles between ONLINE and OFFLINE modes.
			Changes to control panel settings can only be
			made on OFFLINE mode.
	UP ARROW /		Selects sub-menu settings. Acts as form feed
	FORM FEED		command in OFFLINE mode.
	DOWN		Selects sub-menu settings. Acts as manual
	ARROW /		media advance in OFFLINE mode.
	MANUAL
	ADVANCE
	MENU		Accesses user modes and sub-menus. Scrolling
			is from first to last, returning to first.
	Table 4-1. Control	panel button functions

Table 4-1 shows the control panel button functions. Pressing the MENU button displays the name of the function for one second, and then displays the current set value for that setting. For example: accessing the CONTRAST function results in a one second display of CONTRAST, then a display of the current setting for that function, such as C3.

4.3 CONTROL PANEL FUNCTIONS AND SETTINGS

Control panel settings are saved as presets for either USER M1 or USER M2. Presets are initially set to defaults for all menu functions. See Table 4-2 for default settings and organization. Changes to function settings are stored upon setting the plotter to ONLINE. Changes are retained even while the main power is off. To restore the default settings for both USER modes, turn the power switch on while pressing down the MENU button.

Changing function settings:

1.Put the plotter into OFFLINE mode by pressing the ON/OFFLINE button.

2.Access functions by pressing the MENU button. SEL MODE is displayed briefly, then USER M1.

3.To make changes to the USER M1 settings, proceed to step 5.

4.To make changes to the USER M2 settings, select by pressing the up button after SEL MODE is displayed. USER M2 is now displayed and the USER M2 settings can be changed.

5.Press the MENU button to scroll through the function menus. When a change is desired in the function menu, press the up or down arrow within that sub-menu and leave display on desired setting.

6.Press ONLINE/ENTER to save the settings in the selected menus of USER M1 or USER M2.

7.Once the settings have been saved, the display will read either IDLE M1 or IDLE M2 depending on which menu the changes were made in.

19

Test mode

The TESTMODE function allows the user make a test plot (see Figure 7-34). Approximately four inches of plot are produced, in a pattern consisting of a 50% grey scale, small and large checkerboard pattern, and two 1/2” bands of all-black. It will also display the plotters’ firmware revision and strobe count. This enables the user to see that the plotter is creating an image, feeding the paper correctly, and that contrast levels and media settings are acceptable, as well as testing the print function.

To change from the default TESTMODE setting of INACTIVE, press the up button in the TEST MODE sub-menu to display PLOT TST. Then press the ONLINE button to execute the test.

Contrast

The CONTRAST function adjusts the density of the output plots, the default setting is C1. C1 and increment settings (C1 through C10) are relative values. Determination of plot quality and the need to increase or decrease contrast is determined after a test plot is output. If the output is extremely dark, very faint, or irregular, first check that the media setting is correctsee “Media” section of this chapter.

If the contrast needs to be adjusted, change the contrast setting by pressing the up button while in the CONTRAST sub-menu. Starting at the lowest value, adjust the contrast level one value at a time, testing each adjustment. This is particularly important when using lightweight papers or a media with unknown specifications.

CAUTION: Thermal plotting technology involves high temperatures. Incorrect media or contrast settings can damage the printhead or other components and void the warranty. Media damage can also occur.

Speed

The SPEED function adjusts the speed of the plot output. The default setting is 1.0 inch per second.

Change the speed setting by pressing the up or down buttons in the SPEED sub-menu. The 1.0 inch per second setting results in the highest quality output. The next speeds are 2.0, 3.0, and 4.0 inches per second, respectively.

If the plot speed is erratic, or if output quality is unacceptable, such problems may arise when data enters the plotter at a slower rate than the set plot speed. This is most likely to occur on the 4.0 inches per second setting. Lowering the plot speed enables the plotter to match the rate of data from the host and produces a smoother output plot.

When the media setting is FILM, the plotter fixes the speed for maximum quality, plotting at 1.0 inch per second. See “Thermal printhead” in Chapter 5, Theory of Operation, for more details.

20

Media

The MEDIA function adjusts the printhead for various papers or film. The default setting is LT PAPER (light paper). Note that if you are using other media, you must adjust the media setting. Incorrect settings can damage the printhead. If unsure of the media specifications, start at the LT PAPER setting and then increase the setting to HV PAPER if necessary.

Change the media setting by pressing the up or down arrows in the MEDIA sub-menu. Select LT PAPER (light paper), HV PAPER (heavy paper), LT FILM (light film) or HV FILM (heavy film). Note that in FILM mode the print head’s normal strobe time is raised to compensate for the thicker media, which requires a slower plot speedsee “Speed” section of this chapter. Do not use film settings on any other media.

CAUTION: Thermal plotting technology involves high temperatures. Incorrect media or contrast settings can damage the printhead or other components and void the warranty. Media damage can also occur.

Scaling

The SCALING function stretches or scales the plot over a 36-inch length. The default setting is NO SCALE. To determine if scaling is needed, plot a job of a known length and measure it. Adjustments can be made to the scaling in increments of 1/64-inch.

Change the scaling setting by pressing the up or down buttons in the SCALING sub-menu. The up button accesses positive (stretch) increments from +1/64-inch to +30/64-inch.

Beeper

The BEEPER function changes the error sound properties. The plotter beeps when an error condition is determined. Error conditions result when the plotter is out of paper or when the printhead is too hot to operate. These conditions display on the control panel as NO MEDIA or *_HOT_!*. The error status light below the display flashes.

The default audio setting is PULSED. On this setting, the plotter will emit four long beeps upon error detection.

If the plotter is in a noisy environment or if immediate action must be taken regarding error detection, change the audio setting to ON. Change the beeper setting using the up or down buttons in the Beeper sub-menu. On this setting, the plotter will emit a continuous beep tone until the error is corrected. This setting does not apply to the *HOT* error, since stopping the tone would require turning the power off (see “Automatic head temperature feedback” in Chapter 5, Theory of Operation). If you do not require an audible error signal, turn the audio off. Change the setting by pressing the up or down buttons in the BEEPER sub-menu.

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Form feed length

The FFLENGTH function adjusts the distance that the media is advanced upon pressing the FORM FEED button in OFFLINE mode. The default setting is 2 inches. The length can be adjusted for trailer length (the length of media advance after the plot has finished), or for various fan-fold paper lengths.

The plotter senses fan-fold top-of-form marks. These marks signal the plotter to stop the form feed at a consistent distance from the perforated edge of the paper. The top-of-form sensor is located in the paper loading area, which is to the rear of the platen roller and on the right side of the plottersee Figure 7-17. Plotting begins immediately after the perforation, unless margins are defined in the host software.

If you are using paper with Top of Form (TOF) marks, ensure that the form feed length is set to “TOF sens” or a distance equal to, or greater than the distance between these marks. The form feed will stop when it reaches the FORMFEED setting value, or when it senses a top-of-form mark, whichever comes first.

Change the form feed length settings by pressing the up or down buttons in the FFLENGTH sub-menu. Settings are 1.0, 2.0, 3.0, 4.0, 6.0, 8.0, 10.0, 12.0, 14.0 and 16.0 inches, TOF sens, PTOF enasee page 4-9 for TOF display descriptions.

Scan width

The SCANWDTH function adjusts the scan width of the plot, defined in bytes per line. The default scan width is 216 (right justified) bytes per line.

Unless you are using RLTER (remote line terminate) commands, the plotter scan width must be set to the same byte count as the rastered data from the host. Setting the scan width higher than the byte count of the raster data does not create a wider plot. Setting the scan width incorrectly results in skewed output as the data “wraps” and finishes the scan on the next line. This condition is identifiable on the plot in Figure 8-8.

Change the scan width settings by pressing the up or down arrows in the SCANWDTH submenu. The small arrow in the display, to the right of the numerals, indicates no margin. If the arrow is not present, the plotter inserts a left margin of 16 bytes (5/8-inch).

SCANWDTH settings can be 216 bytes, 216 bytes no margin, 264 bytes, 264 bytes no margin, or 296 bytes. Since 296 bytes is the maximum width of the plot media, no margin is placed. For more details on SCANWDTH and using remote line terminate (RLTER) commands, see “Interface timing and signals” in Chapter 5, Theory of Operation.

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Vertical resolution

The VERT RES function adjusts the vertical resolution of the plot along the media length. The default setting is 203 scans per inch (spi) which is equal to 203 dots per inch (dpi). Note that the horizontal resolution is determined by the printhead dot density, which is 203 dpi. Change the vertical resolution setting using the up or down buttons in the VERT RES sub-menu.

The V12 plotter can emulate the 200 dpi vertical resolution setting, to match the rastered host data (for Imperial units). The emulation is approximate, within ±0.04%.

TOF display descriptions

TOF sens enables the top-of-form sensor to use fan-fold paper with “I” marks up to 18” apart. PTOF ena. programmable advance past top-of-form enable, allows custom length media to be used. Advance past TOF mark detection allows flexibility in lining up a variety of fan-fold media with TOF marks in non standard positions.

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Table 4-2 Control panel settings and organization

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THEORY OF OPERATION

5.1 INTRODUCTION

The V12 plotter uses thermal technology to convert data from the host computer into plotted output. Host data enters the plotter’s main logic circuitry via the data port, and passes through the interface circuitry. Parallel data enters 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 proceeds to send the serial data to the printhead. One horizontal line (scan), consisting of a single row of dots, is plotted. The stepper motor advances the paper for the next scan. The cycle repeats until the plotted or printed image is finished.

Figure 5-1 illustrates the main plotter functions.

5.2 PLOTTER FUNCTIONS AND FEATURES

Power supply

The thermal printhead, stepper motor, and cooling fans are powered by a 24 Volt, 17 Amp DC power supply. The power supply features an auto-switchable input, which adapts to different voltage or frequency inputs, for example 110 Volts AC at 60 Hertz or 220 Volts AC at 50 Hz.

The logic circuitry of the plotter including the thermal printhead is powered by an autoswitchable 5 volt DC output supply.

Table 5-1 shows the plotter status signals.

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Figure 5-1. Functional block diagram

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MAINTENANCE AND REPAIR

NOTE: Do not attempt to repair or modify any component of the V12 while it is under warranty. If a component fails, it may be replaced free of charge in accordance with the warranty procedures in this manual. Attempting unauthorized repairs or modifications will void the warranty.

WARNING: There are voltage hazards inherent in the printhead power supply and AC input wiring. Take reasonable precautions to avoid electrical shock. Never service any electrical component of the V12 while the power cord is connected. Severe electrical shock may result.

CAUTION: Take care not to discharge static into the plotter. This may cause damage to integrated circuits or other electronic components. Dissipate static by touching a grounded source, or wearing a static dissipating wrist strap, before using tools on the plotter or touching internal components.

This symbol indicates an area of possible concern due to static discharge into the circuitry. When you see this symbol in the manual, please observe proper static precautions to minimize damage to the circuitry.

6.1 MAINTENANCE GUIDELINES

In order to minimize the complexity of troubleshooting and repairs, the V12 plotter is composed, wherever possible, of field-replaceable units (FRUs). The Imaging Systems Group does not recommend troubleshooting at a component level, but rather to the level of these FRUs. This chapter and the troubleshooting chapter of this manual follow this approach, resulting in faster and easier repairs. Replacing or repairing FRUs, rather than smaller components, minimizes downtime and simplifies procedures.

This chapter provides detailed information on servicing and maintaining the V12. Follow the guidelines below to make problem identification and servicing easier.

Use caution while troubleshooting the V12. Turn the power off and unplug the power cord to prevent electric shock.

Replace one thing at a time when troubleshooting, will make it easier to determine what is causing trouble. If changes are made to more than one component at a time and a solution or new problem arises, it is more difficult to attribute the change to a single part.

Test each change thoroughly after each phase of repair before moving on. This method ensures each part of the repair is correct.

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6.2 REGULAR MAINTENANCE

The V12 thermal plotter is designed to require minimal preventative maintenance. If the thermal printhead and platen roller are cleaned regularly, and the plotter is kept free of debris, extra maintenance and repairs will be kept to a minimum.

This preventative maintenance is the owner/operators responsibility. Damage to the plotter that has in The Imaging Systems Group's opinion resulted from neglect or misuse, will not be covered under warranty.

CAUTION: No parts of the V12 require lubrication. All bearings are sealed and self-lubricating. Bearings must be replaced in pairs if one fails.

Cleaning the thermal printhead

After prolonged use, the thermal printhead picks up fibers from the paper passing under it. These fine fibers collect and compact on portions of the printhead, blocking the contact it makes with the paper during a plot and causing faded patches. Poor contact between the printhead and paper may also cause the affected heating elements (nibs) to fail prematurely because of improper heat dissipation to the paper.

Clean the printhead every time a new roll of paper or film is installed.

1.Turn the plotter power off.

2.Moisten (do not soak) a soft, lint-free cloth with 99% isopropyl alcohol. Rub gently along the length of the printhead.

3.Allow the alcohol to evaporate completely before using the plotter.

CAUTION: Do not touch the printhead with your fingers or other object. The oil on your skin contaminates the printhead, which lessens plot quality and shortens the print head’s life span.

Cleaning the platen roller

After prolonged use, the platen roller picks up fibers from the paper passing above it. These fine fibers collect and compact on portions of the platen roller, creating bumps. The uneven surface of the roller may cause the printhead to contact the passing paper unevenly, producing a blotchy or faded plot.

Clean the platen roller when it appears dirty, or after approximately three rolls of paper or film have been plotted.

1.Turn the plotter power off.

2.Moisten (do not soak) a soft, lint-free cloth with 99% isopropyl alcohol. Rub gently along the length of the roller turning the roller as necessary to remove paper fragments and dust.

3.Allow the alcohol to evaporate completely before using the plotter.

In highly dusty or dirty environments, further cleaning by use of compressed air to keep the plotter clean is recommended. Always clean the head and platten roller with isopropyl alcohol after blowing dust out of the plotter.

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Cleaning the Top of Form/Media out sensors

After prolonged use, especially in field use, the plotters optical sensors will begin to become covered with fibers from the media passing above them, as well as dust in the air. This residue will reduce the effectiveness of the sensors. Clean the sensors when every three rolls of paper or film is installed, to retain the factory set sensitivity of the sensors.

1.Turn the plotter power off.

2.Moisten a Q-tip with 99% isopropyl alcohol. Wipe gently over the optical sensors making sure to get past the outer plastic protective case on the sensors when cleaning.

3.Allow the alcohol to evaporate completely before using the plotter.

6.3 REPAIR PROCEDURES

Please refer to Chapter 8, Troubleshooting, before attempting any repair procedure.

Tools

A selection of tools is necessary to perform most of the maintenance and repairs on the V12. These tools include, but may not be limited to:

Phillips screwdrivers:	#1, #2
Flat screwdriver:	#0
Allen keys:	5/32 inches
Hex socket drivers:	5/16 inches
	11/32 inches
Needle nose pliers	3/8 inches
Small wire cutters
Digital multi-meter
Potentiometer trimmer tool

Opening the plotter lid

1. Release the lid assembly by grasping underneath the black latch bar and pulling it upwards-

Figure 7-1. Open the plotter lid by lifting it straight upwards. Note the lid does not fully open to 90 0.

Removing the top cover

Remove the four philips pan head screws located behind the head assembly and on the rear support plate.

Opening the back panel

1. Remove the two 6/32” x 2” Phillips pan head screws and washers from the top left and top right of the back panel as shown in Figure 7-2. The back panel hinges downFigure 7-3.

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