Wang 2272 User manual

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:.WA·NG
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Digital Drum Plotter
Model: 2272
Customer Engineering
Product Maintenance Manual
3313
741-0455

3313
PR ff ACE
The purpose of this manual is to provide the Wang-trained Customer
Engineer <CE> with instructions to operate, troubleshoot and repair the
Digital Drum Plotter.
Information Service Notice no. 120 is located at the back of the manual .
Second Edition <Aug~984l
This reprint edition is the converted number for and obsoletes docum~nt
number 729-0455. It also incorporates Immediate Service Notice <ISN> P/N
729-0457. This edition of the manual may be used only for the purpose stated
in the Preface. Updates and/or changes to this document will be published as
Publications Update Bulletins <PUB's> or subsequent editions.
This document is the property of Wang Laboratories, Inc. All information
contained herein is considered company proprietary, and its use is restricted
solely to assisting the Wang-trained CE in servicing this Wang product.
Reproduction of all or any part of this document is prohibited without the
prior consent of Wang Laboratories, Inc.
©copyright WANG Labs., Inc.
1976, 1984
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TABLE OF CONTENTS
SECTION 1 INTRODUCTION
1.1 SCOPE
1. 2 DESCRIPTION
1.3 MODEL 2272 TECHNICAL CHARACTERISTICS
SECTION 2 INSTALLATION
2.1 SITE CONSIDERATION
2.2 UNPACKING PROCEDURE
2.3 UNIT INSPECTION PROCEDURE
2.4 OPERATOR CONTROLS AND INDICATORS
2.4.1 CONTROL PANEL
2.4.2 REAR OF UNIT
2.4.3 PLOTTER DRUM
2.5 DYNAMIC CHECKOUT
SECTION 3 OPERATION
3.1
CONTROL PANEL
3.1.1
RUN LAMP
3.1.2
PEN Sh.£TCH
3.1.3
HOME SWITCH
3.1.4
CLEAR SWITCH
3.1.5
PLOT AXIS SELECTION
3.1.6
SET HOME/LIMITS MODE
SWITCH
3.1. 7
SLEW MODE SWITCH
3.1.8
PLOT MODE SWITCH
3.2
OPERATION OF 2272 VIA 2200
CPU
3.2.1
PLOT STATEMENT
3.2.2
2272 DIAGNOSTIC
3.2.3
SPECIAL PLOT CODES
3.2.3.1
Pen Selection HEX(El), HEX(E2),
HEX(E3)
3.2.3.2
Set Home HEX(E4)
3.2.3.3
Power On/Set Home HEX(E5)
3.2.3.4
Binary Plot Vector (EO), Short
Binary
Plot Vector (E6)
3.2.3.5
Hex Code For Pen Up (HEX(OE)), Pen
Down
{HEX(OF)), Reset (HEX(FA))
3.2.3.6
Slewing
3.2.3.7
Selection of
Left and Right
Limits, Home
SECTION 4 THEORY OF OPERATION
(INFORMATION TO FOLLOW)
1-1
1-1
1-4
2-1
2-1
2-1
2-2
2-2
2-4
2-4
2-4
3-1
3-1
3-1
3-1
3-1
3-2
3-2
3-4
3-5
3-5
3-5
3-6
3-6
3-6
3-7
3-8
3-9
3-10
3-14
3-14

SECTION 5 ADJUSTMENT, REt-OVAL AND REPLACEMENT PROCEDURES
5.1 IN'i'RODUCTION
5. 2 ELECTRICAL ADJUSTMENTS
5. 3 MECHANICAL AND ELECTROMECHANICAL ADJUSTMENT, REMOVAL/
REPLACEMENT INDEX
5.3.1 ADJUSTMENT GUIDE
5.3.2 PAPER GUIDE
5.3.3 PEN AXIS INCREMENT ADJUSTMENT
5.3.4 PAPER DRIVE ASSEMBLY
5.3.5 PAPER SPROCKET AND SPROCKET C.OVER ASSEMBLIES
5.3.6 PHOTOCELL/HOME POSITION ALIGNMENT
5. 3. 7 CARRIAGE ASSEMBLY
5.3.8 CARRIAGE DRIVE ASSEMBLY
5.3.9 CARRIAGE ARM ASSEMBLY
5.3.10 PEN/SOLENOID ASSEMBLY
5.3.11 ELECTRICAL CHASSIS REMOVAL/REPLACEMENT
5.3.12 SIDE COVER REMOVAL/REPLACEMENT
SECTION 6 MAINTENANCE
6.1
INTRODUCTION
6.2
DIAGNOSTIC
6.2.1 DIAGNOSTIC HOME POSITION SETUP
6.2.2
OUTPUT SYSTEM DIAGNOSTIC
6.2.3
2272 DIAGNOSTIC
6.3
PREVENTIVE MAINTENANCE
6.3.1 VISUAL CliECKS
6.3.2 ADJUSTMENTS
6.4 TROUBLESHOOTING
SECTION 7 ELECTRICAL SCHEMATICS
7.1 INTRODUCTION
7.2 LIST OF ELECTRICAL SCHEMATICS
7.3 SIGNAL RUN LIST
SECTION 8 MECHANICAL ASSEMBLY DRAWINGS
8.1 INTROCUTION
APPENDIX A ASCII CHART OF PLOTTER CONTROL CODES
APPENDIX B PLOTTER MNEMONICS
5-1
5-1
5-2
5-3
5-4
5-5
5-7
5-9
5-10
5-13
5-15
5-17
5-19
5-21
5-21
6-1
6-1
6-1
6-2
6-2
6-2
6-2
6-2
6-2
7-1
7-1
7-1
8-1
A-1
B-1
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1.1 SCOPE
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SECTION 1
INTRODUCTION
This manual describes the Model 51/53/51M/53M Digital Drum Plotter
manufactured by Wang Laboratories, Inc.
General i11formation, detailed theory of operation and maintenance
routines are included to enable Customer Engineering personnel to ma:l.n-
tain the plotter.
Tite manual is arranged in the following manner:
SECTION 1 - INTRODUCTION: Provides the reader with the scope of
this manual and a general description of the plotter.
SECTION 2 - INSTALLATION: Contains unpacking and installation
instructions for the plotter.
SECTION 3 - OPERATION: Describes the function of all operator
controls and indicators including the basic 2200 CPU
operations for outputting data.
SECTION 4 - THEORY OF OPERATION: Contains descriptions of the
mechanical assemblies and the printed ci~cuit board
electronics.
SECTION 5 - ADJUSTMENTS, REMOVAL AND REPLACEMENT PROCEDURES.
SECTION 6 - MAINTENANCE: Includes di.agnostics, preventive main-
tenance and troubleshooting tables.
SECTION 7 - ELECTRICAL SCHEMATICS: Contains a complete set of
schematics, wiring and interconnection diagrams.
SECTION 8 - MECHANICAL ASSEMBLY DRAWINGS: Allows the user to iden-
tify any part of the plotter.
1.2 DESCRIPTION (~EE FIGURE 1-1)
'lbe Digital Drum Plotter is available in the following configurations:
1-1

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MODEL
DESCRIPTION
MARKETED AS
51
SINGLE PEN
ENGLISH
UNITS
2272-1
53
TRIPLE PEN
ENGLISH UNITS
2272-2
SlM
SINGLE
PEN
METRIC UNITS
2272-lM
53M TRIPLE PEN
METRIC UNITS
2272-2M
Tile Digital Drum Plotter provides point, line and alphanumeric
plotting capacity to any ?>bdel 2200 System that has plot capability .
'nle drum plotter is conL,olled by an 8080 microprocessor, which
includes a 512 byte RAM memory that is used to buffer plot information
sent from the Model 2200 CPU. Vectors take 5 bytes; alphanumeric
characters and plot control characters are stored as is.
The manual control panel on the Digital Drum Plotter provides a
number of convenient control functions which include: manual slewing
of the pen and paper, four quadrant axis rotation selection, conveniently
setable HOME position (X = O, Y = 0 origin) and pen and paper movement
limits to any position on the plotting surface, plot interrupt and
automatic return facility, and pen up override •
Plotting is controlled with the 2200 BASIC language PLOT statement.
The plotter has an input buffer which allows a number of plot vectors
and alphan\DD.eric plotting data to be stored prior to plotting, thus
providing overlap between plotting and CPU processing. The Model 2272
Plotter has built-in alphanumeric character generation capability
which plots a standard 64 character ASCII set in 15 selectable character
sizes. A zero reference parameter {HOME) permits quick resetting of
the pen and paper position to any manually set origin, either under
nanual or program control. Additional plot codes are available to
allow efficient plotting of prestored plot information, special·
lettering and symbols via binary plot vectors and to perform plot
initialization functions under program control.
Manual controls permit setting the home position coordinate axis
to one of four orientations acconunodating plots of many shapes. Manual
controls also permH slewing the pen position as desired, placing the
pen in the 'up' position and clearing the plotter buffer.
l-3

Both English and metric versions plot with interchangeable pens;
the Model 2271-1 (-lM) has a single pen assembly anri the Model 2272-2
(-2M) has an optional three pen r.arria~L' assembly. The 16 inch (40. 6
cm) plotting axis is covered by a cable driven pen assembly; the 160
inch (406 cm) axis is operated by the pinfeed paper mechanism. The
English version drum plotter supports approximately 3200 i,,,..remPnts
of pen movement in the left-right direction (16 inches x 200 steps/
inch) and 16383 increments of paper movement in both the forward and
reverse direction if HOME position is not reset; there is no restriction
on paper movement if HOME position is reset. The metric plotter has
approximately 4064 increments in the left-right direction and 16383
increments of paper in the forward-reverse direction if HOME position
is not reset.
The standard plotter (metric or English) is 100% compatible with
the 2212 protocol except that 64 ASCII plotting characters are supported
instead of 48. Options will include a three pen carriage assembly,
additional microcode (PROM) chips to support expanded built-in plotting
functions and an automatic paper roll feed handler which will 100unt on
the rear of the plotter.
The plotter connector is designed to connect to the 2221W 1/0
controller board in the 2200 chassis. The plotter drum supports 18
inch (45.72) wide platen fed paper [17 1/2" (44.45 cm) pin to pin]
which rolls forward and backward over the drum.
1.3 MODEL 2272 TECHNICAL CHARACTERISTICS
Plotting Rate:
(English)
Plotting Rate:
(Metric)
Plotting Area:
1.5 inches/sec to 4.5 inches/sec
vertical or horizontal
1.5 inches/sec to 6.4 inches/sec
diagonal
3 cm/sec to 9 cm/sec vertical or
horizontal
3 cm/sec to 12.7 cm/sec diagonal
16 inches (40.6 cm) wide by unlimited
length
1-4
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AlphantDDeric Plotting:
Programmable Control Codes:
Plotting Increment:
Plotting Accuracy:
Paper Dimensions:
Pen:
Manual Plotter Controls
and Indicators:
Dimensions:
Operating Temperature:
Humidity:
64 UASCII Characters, 15 Selectable
Character Sizes and Variable inter-
character spacing
See Append ix A
.005 inch per step
.01 cm per step
.01 inch + .1% per inch of plotting distance
cm + .1% per cm of plotting distance
Continuous perforated roll paper (18" edge
to edge, 400 ft)
Ball point, fiber tip, technical ~nk pens.
On -Off switch
Mode Selection -3 pushbuttons (PLOT,
SLEW, SET HOME/LIMITS)
Manual Slew Control - 5 pushbuttons
(+, ~. +, +, HOME)
Axis Rotation Selection -4 pushbuttons
Pen Up Override -1 pushbutton
Clear -1 pushbutton
Run Indicator Light
Height:
Width:
Depth:
10.2 inches (26 cm)
33 inches (84 cm)
14 inches (36 cm)
50° to 90°F" (10° to 32°C)
30 to 80% Relative, non-condensing
1-5

Power Source:
Weight (Approx.):
Storage Temperature:
Storage Humidity:
50/60 Hz ~ 1/2 cycle
115 or 230 VAC +10% 230 WATTS
Internal Selection (See Section 6)
90 lbs. (41 kg)
-40° to 130°F (-40 to 55°C)
0 to 90% Relative, non-condensing
1-6
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2.1 SITE
C,ONSIDERATIONS
SECTION 2
INSTALLATION
The ventilation fan intake screen should not be obstructed by any
objects which could reduce nor111al airflow. r.onsideration should be
given to paper stacking in front of and behind the plotting surface.
For environmental temperature, humidity, etc., see Technical Character-
istic in paragraph 1.3.
2.2 UNPACKING PROCEDURES
1) Open packing carton by cutting tape on seams.
2) Remove top section of instapack.
3) Lift printer out of box and place on table •
4)
Remove tape from carriage assembly.
2.3 UNIT INSPECTION PROCEDURE
1) Remove side covers and electrical chassis (Section 5.3.11, 5.3.12).
2) With the interior completely visible, inspect all parts of the
plotter. Look for any unusual conditions. The following list is
a suggested procedure. If any faults are found that require re-
placement or adjustment, refer to Section 5 of this manual.
WARNING
No power is to be applied to the plotter
during this inspection.
(a) Check for damaged or loose parts •
(b) Check for printed circuit boards loose in their connectors.
2-1

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(c) Check the cable connectors and fingerboards to insure they
are firmly seated in their sockets.
2.4 OPERATOR CONTROLS AND INDICATORS
2.4.l CONTROL PANEL (FIGURE 2-1)
NOTE:
Refer to Section 3. l for more detail.
POWER ON LAMP: Illuminates when power is on.
RUN LAMP: Illuminates when plotter is in PLOT mode and processing plot
vectors and characters.
PEN SWITCH: Forces pen(s) into \lllconditional "up" position when switch
is depressed. When switch is up, pen is \lllder program control.
HOME SWITCH: Move pen and carriage to currently selected home position.
CLEAR SWITCH: When plotter is in slew 100de or set home/limits mode
and the CLEAR switch is depressed, the plotter buffer is cleared.
The clear switch is inoperative when the plotter is in the plot
mode.
Lx SWITCH:
0 degree axis rotation.
rx
Y SWITCH: 90 degree axis rotation.
x
l_y SWITCH: 180 degree axis rotation.
rY
X SWITCH: 270 degree axis rotation.
SET HOME/LIMITS MJDE SWITCH: When depressed, operator can reset Home
position and the pen and carriage movement limits.
SLEW MODE SWITCH: When depressed, operator can manually position pen(s)
left or right and move the paper forward or backward using direction
switches (...,, +, +, +,) and Home po si t·ion switch.
PLOT MODE SWITCH: When depressed, plotter input is controlled by CPU.
2-2
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FIGURE 2-1 CONTROL PANEL
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FIGURE 2-2 REAR VIEW OF PLOTTER
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2.4.2 REAR OF UNI'l.' (FIGURE 2-2)
ON/OFF SWITCH: Switch AC power to unit located on lower backside of
plotter.
MAIN FUSE: 3 amp (SB) 250 volt fuse for 115 VAC or 1.5 amp (SB) for
230 VAC which fuses entire unit.
I/O CONNECTOR: 36 pin amphen.ol connector to connect plotter to CPU
using an I/O cable.
2.4.3 PLOTTER U?.UM
PAPER SPROCKET ADJUSTMENT KNOBS: Adjust sprocket for proper paper width.
2.5 DYNAMIC CHECKOUT
1) Connect power cord to 115 or 230 volt outlet as specified. Insure
that unit has the proper input.
2) Connect
I/O cable to the I/O connector on rear of the plotter and
the connector on the 7079 I/O control card in CPU for 2200S/T units;
connect I/O cable to the plotter and to printer connector on the
2200E/F units.
3) Load paper.
(a) Open sprocket covers.
(b) Fit the feed holes of the paper into the pins of the sprocket
wheels and close the covers.
4) Turn power on.
5) Insure that cooling fan is running.
2-4
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3.1 CONTROL PANEL
3.1.1 RUN LAMP
SECTION 3
OPERATION
The run lamp is an LED which illuminates when the plotter is
processing plot vectors and characters in the PLOT mod~. It is
extinguished when the plotter is not plotting because there is either
no more information in the buffer to plot or the user has interrupted
plotting by placing the plotter in the SLEW mode or the SET HOME/LIMITS
rode.
3.1.2 PEN SWITCH
The pen switch tmconditionally forces the plotter pen(s) into the
UP position when the pen switch is depressed. The CPU program controls
the pen(s) when the pen switr.h is up •
3.1.3 HOME SWITCH
When the HOME switch is depressed, the pen and carriage will be
moved at maximum ramp rate to position the currently selected pen at
the currently selected home position. When power is first turned on,
hCllle position is initially set to a default value of current drum
rotation position and pen 1 centered on its axis.
3.1.4
CLEAR SWITCH
The plotter buff er is cleared when the plotter is in the slew mode
or set home/limits m:>de and the CLEAR switch is depressed. That is,
all plot vectors and commands currently stored in the plotter buffer
but not yet executed will be cleared without being executed •
3-1

3.1.5 PLOT AXIS SELECTION
A set of four ganged pushbuttons are used to manually set the
desired orientation of the X and Y plot axis on the drum plotter.
Axis rotation is controlled by the 8080 microprocessor used in the
plotter.
y
Lx
The following X and Y plot axis combinations are used:
+X = Pen Right Movement
+Y = Paper Out Movement
+X = Paper Out Movement
+Y = Pen Left Movement
+X = Pen Left Movement
+Y = Paper In Movement
+X = Paper In Movement
+Y = Pen Right Movement
3.1.6 SET HOME/LIMITS MODE SWITCH
When the SET HOME/LIMITS 100de switch is depressed, the operator
can reset: HOME position, left and right pen movement limits, and the
in and out paper movement limits. The HOME position represents the
X = O, Y = 0 axis of a graph. The movement limits represent the points
beyond which the pen and paper are not allowed to move on a plot.
Any plotting vectors sent by the 2200 which go beyond the currently
defined limits will be truncated automatically •. It is also important
to have these limits theoretically defined on the drum plotter since
it moves at high (ramped) speeds and encountering mechanical limits at
these speeds could result in loss of current position accuracy.
3-2
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When in SET HOME/LIMITS UK>de, the positioning (+t++) and HOME
pushbuttons are used to set these positions as follows:
push
hold down
CLEAR
push
push
hold down
CLEAR push
push
hold down
CLEAR push
push
hold down
CLEAR push
+
+
+
+
+
3-3
Sets left pen limit to
current position of pen 1
Clears current left pen
limit restores it to
true left margin (i.e.,
mechanical left margin
+ 6X) (6X = 3 pen offset)
Set Right pen limit to
current position of pen 1
Clears current right pen
limit, restores it to true
right margin (i.e.,
mechanical right home)
Set limit for paper feeding
out to the current position
of drum rotation
Clears current paper out
limit. Removes any limit
condition.
Set limit for paper
feeding into the current
position of drum rotation
Clears current paper in
limits. Remove any limit
condition •

push
HOME
Resets Home point (X = 0,
Y = 0) position of pen 1
and drum. (Adjusts all
limits relative to this
new reference point, this
is transparent to the user)
Default -- when power is first turned on the default settings
for HOME and limits will be:
Paper In -- No Limit
Paper Out -- No Limit
Left Pen Margin True
left margin
(Mechanical limit + 6X, when 6X allows all
pens to plot within surface, i.e., offset
for 3 pens)
Right Pen Margin -- True right margin of plotting surf ace
Home ~ Current Drum rotation position and pen 1 at midpoint
position.
The 2200 RESET will not affect margins and home. The CLEAR signal
will clear the limits. (CLEAR must be a D.C. level.)
3.1.7 SLEW MODE SWITCH
When the slew mode switch is depressed, the user can use the manual
position pushbuttons (+, t, +, ~. HOME) to position the pen left or right
and move the paper in and out. The slew mode may be used to set the
limits and the home position prior to plotting. One additional feature
of slew mode is that it allows a plot to be temporarily interrupted,
(to allow, for example, the user to slew out the paper and examine the
plot). If the slew mode switch is depressed during a plotting operation,
the plot is temporarily halted and the user may then slew the paper out,
etc. When the system is returned to the PLOT mode the paper and pen
are automatically repositioned and plotting resumes, t.mless the system
has been CLEARED.
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