Universal WPNP-400NI-12-PIDS User manual

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OWNER’S MANUAL
INSTALLATION - OPERATION - MAINTENANCE
STENCILING & MARKING SYSTEMS
WPNP-12-PD-22139
NON-POROUS
WPNP-400NI-12-PIDS, WPNP-400NI-12T-PIDS,
WPNP-400NI-12-PIDS-D & WPNP-400NI-12T-PIDS-D
WEB PRINTERS
UNIVERSAL STENCILING & MARKING SYSTEMS, INC.
P.O. BOX 871 - ST. PETERSBURG, FLORIDA33731 USA
PH:[phone] -E-Mail:[email protected]
Website: www.universal-marking.com

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PREFACE
SPECIFICATIONS
WPNP-400NI-12-PIDS& WPNP-400NI-12T-PIDS
WPNP-400NI-12-PIDS-D & WPNP-400NI-12T-PIDS-D
Printing Dies
XFNeoprene Ink Rolls
QUICK START
Installingthe Printer
Preparing the Printer for installation of the Ink Roll
Preparing the Ink Roll for installation
InstallingtheInk Roll
Reinstalling the Inking System on the Printer
Installing the Printing Dies
Inking System PositionAdjusting Knobs
Pre-Inkingthe XF NeopreneInkRoll
BASIC PRINCIPLES OF OPERATION
The PIDS System
HighSpeed PrintingApplications
PIDS-DIGITAL-CE Programmable Ink Delivery Systems
Encoder Sensor for Digital Models
MAINTENANCE
Adjustment of the Inductive Proximity Sensor
Cleaning the Printer
Cleaning the Transfer Roll
Cleaning the Printing Dies
PARTS DIAGRAMS & PARTS LISTS
UNIVERSALproducts are manufacturedto exacting standards and everyavailable step hasbeen taken toassure
your complete satisfaction. It is most important, however, that the instructions contained in this manual are read
and carefully followed for best results. Failure to do so may result in unsatisfactory performance, damage to the
equipment and personal injury.
IMPORTANT NOTE
- LIMITED WARRANTY -
UNIVERSALWPNP-400NI-12-PIDSWebPrintersare guaranteed tobefreefrom defects inmaterialsandworkmanship for
a period of 90 days from the date of purchase. Components found to be defective during this time will be repaired free of
charge if returned to the factory. Damage resulting from use of improper inks, improper installation, or operation is not
coveredunder thescope ofthis warranty. Forwarranty serviceplease contactour Customer Service Department.
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QUICK START
With a full understanding that very few people like to read manuals or have the time to do so, we have
createdaQuick Start manual which willgiveyou all theinformationyou need togetyour printer operating
in just a few minutes.
PREFACE
Abulk ink reservoirsuppliesa wide varietyof fast dryingdye and pigmented inksto the printerautomatically during
production using a PIDS-200 Digital Programmable Ink Delivery System. The different types of ink that can be
used include, Universal #100, Universal Type D and Universal Type M for marking on plastic films, metal, rubber
and glass materials.
The WPNP-400NI-12-PIDS Series printers, have a print width capacity of 4”(100 mm) and a print drum
circumference of 37.6” (957 mm) making this printer the best choice for printing large text messages and logos on
continuousweb materials whenlonger print repeatintervals are required. These non-indexing, topmount printers
have a rugged, dual frame, anodized aluminum construction with stainless steel shafts and axles and a modular
inking system which can be removed from the printer in a matter of seconds without the use of tools.
The PIDS and PIDS-D (Digital) models of the WPNP Series Printers are designed specifically for use with
Universal’s PIDS-DIGITAL-CE Programmable Ink Delivery Systems. It is important to note that when installing 2
WPNP Series printers on a single web production line, only one of the printers needs to be a Digital model, the
second printer can be a standard PIDS (non-digital) model.
The specification section includes drawings with the basic dimensions of the printers, the net weights, maximum
die capacities, maximum print width and print drum circumferences. This section also lists the specifications for
the printing dies.
To keep your coder operating properly, it is important to read and understand this manual which explains the
installation, basic operation and maintenance of the WPNP-400NI -12-PIDS Series printers.

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SPECIFICATIONS
WPNP-400NI-12-PIDS & WPNP-400NI-12T-PIDS,
WPNP-400NI-12-PIDS-D, WPNP-400NI-12T-PIDS-D
ModelShown: WPNP-400NI-12-PIDS
NET WEIGHT: 36 LBS. - 13.5 OZS. (16.71 KG.))
MAXIMUMDIE SIZE- US STANDARD: 3-7/8” (30 RIBS) X 37” LENGTH
MAXIMUMDIE SIZE- METRICPRINTERS ONLY: 98.4 MM (28 RIBS) X 939.8 MM LENGTH
PRINTDRUMCIRCUMFERENCE: APPROXIMATELY 37.7" (958 MM) MEASUREDAT DIE FACE
6.53”
166 mm 4.53”
17.47”
21.98”
8.95”
3.72”
14.73”
12.00”
115 mm
444 mm
558 mm
227 mm
95 mm
374 mm
305 mm

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Printing dies are manufactured to precision thickness
tolerances which are very critical to the performance of
these printers. When installed, the face of the printing die
should extend only .007" - .008" beyond the radius of the
Bearer rings as shown. Using dies that do not meet the
design specifications will result in poor print quality and
possible damage to the transfer roll.
Although there are several competitive rib backed die
systemsavailable, it isvery important to notethat they are
not all made to the same rib spacing or thickness
specifications and they are not interchangeable.
Universal also offers Metric RIBtype® Die Systems for use in countries where metric character sizes are the
standard. The Metric dies are thicker and the rib spacing differs slightly from the standard printing dies therefore
the two versions are not compatible. To accommodate the differences, the print drums for Metric dies are
machined to a slightly different diameter from the U.S. versions.
The printer model numbers for Metric will have a “-T” suffix and the Metric Drum Covers have a distinct pink color.
Diesare also availablein “logo” formin which acomplete text messageis produced ona single piece of ribbacked
rubber. Logo dies are much faster to change and generally produce better print quality due to their unitized
construction. Custom type styles, company logos, and trademarks can also be photographically reproduced from
black and white art work.
RIBtype® PRINTING DIES
Universal Non-Porous Web printers are designed to use RIBtype® printing dies which have a molded rib backing.
The ribs on the back of the die snap into mating ribs in the Drum Cover on the print drum. The printing dies are
produced in many standard character styles and sizes and are available in sets containing a combination of
individual alphabetic and numeric characters or in sets containing numeric characters only. These character sets
or “sorts” can be used to make up text messages and code numbers as necessary.
BEARER RING
.007” - .008”
PRINTING DIE
DRUMCOVER
FIGURE1
PRINTER MODELS DESIGNED FOR METRIC RIBtype® PRINTING DIES
SPECIFICATIONS
XF NEOPRENE INK ROLLS FOR THE WPNP-400NI-12-PIDS
The WPNP-400NI-12-PIDS system is designed to use the re-inkable, XF
Neoprene Ink Rolls made from an extra firm density neoprene material. The
extremely fine cell structure of these rolls provides exceptionally good print
quality and can be used with a variety of alcohol or glycol base inks. Unless
you ordered a pre-inked roll with your machine, these rolls are supplied in a
dry condition. Pre-inked rolls are available from the factory and are
recommended for first time users but if you have a dry roll, please follow the
pre-inking instructions on page 14.
FIGURE2

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Use two 3/8” diameter bolts to attach the printer’s mounting bracket to a rigid mounting plate. Ensure that the
printer is aligned to track parallel with the web material and that both Rubber Friction Bears on the Print Drum
contact the web with equal pressure.
When printing on thin materials, it is imperitive that the print drum is supported by an idler roll or a flat
platen under the web as indicated.
ThePIDS System whichwill supply inkto the printerduring operation shouldbe located asclose as possibleto the
printerto minimize thelength of theink tubes throughwhich the ink isfed. (See additionaldetails on theinstallation
of the PIDS System in the PIDS Manual.)
WEB TRAVEL
MIN
MAX
123
INSTALLING THE PRINTER
When choosing a location for the installation of the printer, several issues should be considered:
1 - It is always best to install the printer in a location that is free from dust and other contaminates which can cause
degredation of the print quality. Fast drying Non-Porous Inks become tacky during the drying process and printing
dies will pick up dust particles and require more frequent cleaning.
2 - If possible, install the printer in a location that provides for easy access.Although the inking system on these
printers can be removed in seconds for convenient maintenance on a work bench, changing printing dies requires
easy access to the print drum.
3 - The WPNP Printers should be mounted at an angle of 15 to 30 degrees from horizontal, as indicated in the
Figurebelow.
IDLERROLL
FIGURE 3
15 - 30 DEG.
QUICK START

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FIGURE 5
TheWPNP-400NI-12-PIDSNon-PorousWeb Printers are designed fortopmountinstallationto print on continuous
non-porous web materials. To prepare the printer for use, the following steps should be followed.
PREPARING THE PRINTER FOR INSTALLATION OF THE INK ROLL
The WPNP-400NI-12-PIDS Printers have been designed with an easily removable inking system. The Ink Rolls
can be installed with the inking system on or off the printer. Prepare the printer as follows:
3 - Loosen the Inking System Locking Knob by turning the
knob counter-clockwise approximately 1 revolution.
FIGURE 4
QUICK START
FIGURE 6
1 - Remove the Thumbscrews from both sides of the Inking
System
2 - Carefully remove the Wiper Adapter from the Inking
System. Do not damage the thin Mylar Wiper.

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6 -Remove the Knurled Retaining Nut by turning it in a
counter-clockwise direction.
7 -Remove the Drive Wheel Cover by lifting it straight off
the axle and locating pin.
QUICK START
FIGURE9
FIGURE10
4 -Swing the Inking System Locking Assembly to the left
(counter-clockwise) as shown in fig 7.
5-TheInkingSystemcanberemovedfor off-line installation
of the Ink Roll by grasping the Inking System Assembly
by the lifting tab and pulling the Inking System out of the
machine.
FIGURE8
FIGURE7

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8 -Remove the Knurled Drive Wheel.
Note: The Knurled Drive Wheel is installed on the top
of the Anilox Roll and is engaged by 3 stainless steel
drivepins.
9 -Remove the Inking System Cover by carefully pulling
the Cover straight off the axle. Be very careful not to
let the cover drag across the surface of the Anilox Roll
during removal.
FIGURE11
FIGURE12
QUICK START
FIGURE13
PREPARING THE INK ROLL FOR INSTALLATION
It is imperitive that the ink roll installed on this printer is properly inked and prepared for installation.
If you ordered a pre-inked roll with your printer, the following steps will guide you through the preparation and
installation of this roll. If you have a dry roll, see page 14 for inking instructions.
1 -To prepare the pre-inked roll for installation, you will
need a clean piece of cardboard, a pair of rubber gloves,
a pair of sissors or razor knife and a round metal rod
approximately1/4”- 3/8” (6mm - 9mm) diameterbyat least
6” (150mm) long. Around shank Phillips screwdriver will
work nicely.
Note: Ink will stain clothes and other materials so careful
handlingisrequired during thisprodedure.

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1 -Rotate both the Ink Roll Eccentric Knobs on the Inking
System Covers to the “MIN” position.
In this position, the ink roll will not touch the
AniloxRoll when the cover is reinstalled.
2 -While holding the Inking System Cover in one hand, slide
the Ink Roll onto the Ink Roll Axle.
INSTALLING THE INK ROLL
FIGURE16
FIGURE17
Usethe round rod or screwdriver used duringthe
ink roll preparation procedure to position the roll
and slide the roll onto the ink roll axle.
QUICK START
3 -Holding each end of the screwdriver or round rod, roll
the Ink Roll several times across the piece of cardboard
while applying light pressure to remove the excess ink.
You want the roll to be fully saturated but not dripping
wet. If in doubt about the proper saturation level of the
rollduring thisprocess, itis betterto removea bitmore
ink than not enough. Installing a roll with too much ink
will cause dripping inside the inking system housing.
2 -Put on the rubber gloves and carefully cut the end of
the bag open and remove the Ink Roll using the rod or
screwdriver.
Pre-Inked Rolls are intentionally over-saturated to
prolong storage life. There may be a small amount of
liquid ink in the bag when it is opened so be careful
handlingthe openedbag afterthe rollis removed. Ink
may run out.
FIGURE14
FIGURE15

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4 -When the cover assembly is properly positioned against
the Inking System Assembly, replace the Knurled Drive
Wheel.
Carefully align the 3 stainless steel pins on the
topoftheAniloxRollwiththe3holesintheKnurled
Drive Wheel. When the Knurled Drive Wheel is
properly engaged, the top of the stainless steel
pinswillbeapproximatelyevenwiththetopsurface
oftheKnurled DriveWheel.
FIGURE19
QUICK START
FIGURE18
3 -Carefully guide the Cover Assembly onto the Inking
System being careful not to scratch the surface of the
Anilox roll in the process.
5 -Replace the Drive Wheel Cover by aligning the two holes
in the cover with the Anilox Roll Axle and the Stainless
Steel Locating Pin. Ensure that the cover is positioned
completely against the Inking System Cover.
6 -While holding the Inking System Assembly together,
replace the Knurled Retaining Nut. The Knurled Nut
should be just tight enough to hold the Drive Wheel in
place. Do not over tighten this nut.
The inking system is now ready for final
adjustmentand use.
FIGURE20
FIGURE21

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QUICK START
2 - Rotate the Inking System Locking Assembly to the
vertical position and lightly tighten the Locking Knob.
1 -Align the Inking System baseplate with the two slots on
the inside of the Printer Side Frames and slide the
Inking System into the printer.
REINSTALLING THE INKING SYSTEM ON THE PRINTER
FIGURE22
FIGURE23
FIGURE24
FIGURE25
3 -Carefully insert the Wiper Adapter into the Inking
System. The plastic Wiper must be installed under
the Ink Roller with the side of the Wiper Block with
the engraved word “TOP” facing up as shown.
4 -Reinstall both Thumbscrews to secure the Wiper
Adapter.

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1 - To install Printing Dies on the Print Drum, first mix a solution
of water with a small amount of liquid dishwashing detergent
to serve as a lubricant. This will make the installation of the
die much easier. Using a sponge saturated with this mixture,
moisten the ribs on the back of the Die.
2 - Starting with one end of the printing die, align the ribs on
the back of the die with the grooves in the Drum Cover.
Firmly press the die into the drum cover and continue
pressing the ribs together, working from one end of the die
towards the other, until the entire die is fully engaged.
Do not use any other lubricants such as silicone or
oil on the Printing Dies.
QUICK START
INSTALLING THE PRINTING DIES
FIGURE26
FIGURE27
3- While rotating the Print Drum by hand or under power, slowly
rotate both the Ink Roller Eccentric Knobs from the “MIN”
towards the “MAX” position and observe the face of the
printing dies for ink. Proper adjustment should be reached
at a position between the “2” and “3” reference numbers.
The Ink Roller Eccentric Knobs move the Ink Roll into
contact with the Anilox Roll. The Eccentrics should not
be turned any more than necessary to apply a uniform
coating of ink to the die face. FIGURE28
ThePositionAdjustingKnobs servetwofunctions. First, they provideadjustmentfor the contactpressure between
theAniloxRoll and theface of theRubber Printing Dies. TheAnilox Roll shouldcontactthe face ofthe printing dies
with just enough contact pressure to properly transfer ink. Secondly, theAdjusting Knobs allow for a small degree
of angular alignment between theAnilox Roll and the face of the printing dies. The surface of theAnilox Roll must
be adjusted exactly parallel with the face of the Printing Dies in order to ensure uniform transfer of ink across the
full width of the Print Drum. If adjustment is required, loosen the Inking System Locking Knob and make small
adjustments to the Position Adjusting Knobs. Re-tighten the Inking System Locking Knob and check the print
quality. After the correct adjustment has been made, the Position Adjusting Knobs should require no further
adjustment.
INKING SYSTEM POSITION ADJUSTING KNOBS
FIGURE29
1 - There are 2 Position Adjustment Knobs on the Joining Bar at the
bottom of the slots with threaded shafts which contact the front of
the Inking System Baseplate. These knobs have been roughly set
at the factory but may require fine adjustment when the system is
first used.
Do not adjust these Knobs unless the print quality indicates a need to do so.

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Note: Dry rolls must be pre-inked before using the PIDS System.
PRE-INKING A NEW XF NEOPRENE INK ROLL
Warning: Non-Porous Inks contain flammable solvents. Do not smoke or handle these rolls in the presence of sparks
or open flames. These inks will also stain clothing, furniture, carpeting and your hands. We recommend wearing
rubber gloves and an apron during the following procedures.
Please follow the guidelines below to properly pre-ink your roll:
1 - Wearing a pair of rubber gloves and an apron, pour
approximatly 1” of printer ink into the bottom of a clean
container large enough to hold approximately 14 ozs. of ink
and the 4” roll on it’s side.
A 4” XF Neoprene Roll will hold approximately 14
fluidounces of ink
2 - Carefully place the roll into the container as shown in fig 31.
Hold the roller and firmly press down on the foam side of the
ink roll and then release the pressure. Rotate the roll and
repeat this process several times pressing on different areas.
This will force the air out of the roll and the voids will be
filled with ink.
Repeatthe process aboveuntil allthe ink inthe containerhas
beenabsorbedintothe roll. Addmoreink to thecontainerand
repeat the process until the roll will absorb no more ink.
3 -Insert a round metal rod or screwdriver through the Ink
Roll Core and roll the roller several times across a scrap
piece of cardboard while applying light pressure to
remove the excess ink.
FIGURE30
FIGURE31
FIGURE32
TheXFNeopreneInkRollsusedontheWPNPPIDSPrinters are manufactured from an extra firm densityneoprene
foam material. The extremely fine cell stucture of this foam gives it the capacity to hold and evenly distribute a
large volume of ink which migrates through the foam by capillary action. The ink roll relies on capillary action to
draw ink from the center of the roll and evenly distribute it to the surface where it is applied to the transfer roll. The
capillary action of ink in a dry foam material is rather poor, much like when you submerge a dry sponge in water.
When the roll is initially pre-inked, it must be thoroughly saturated to ensure all of the cells in the foam are wetted
with ink. Even if all of the ink is squeezed out of the roll after the initial inking, the capillary action of the roll is
dramaticallyincreased. Maximizingcapillaryactionisextremely importantwhenusingaPIDSSystem forsubsequent
automatic inking.
You want the roll to be fullysaturated butnot drippingwet. If
in doubt about the proper saturation level of the roll during
this process, it is better to remove a bit more ink than not
enough.Installinga roll withtoomuch ink willcausedripping
inside the inking system housing.
QUICK START

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BASIC PRINCIPLES OF OPERATION
FIGURE33
THE PIDS SYSTEM
The positive displacement peristaltic pump heads used in the PIDS systems move ink through progressive waves
of contraction and relaxation of a resilient pump tube. The ink never touches any of the pumps component parts
so maintenance is limited to replacing the pump tube after approximately 1,000 hours of operation. Universal’s
quick disconnect replacement pump tube assembly, facilitates pump tube changes in less than 10 seconds.
Universal’s Programmable Ink Delivery Systems were developed as an advanced method of supplying ink “on-
demand” to contact roll printing equipment. The PIDS system combines the simplicity of electronic programming
and the accuracy of peristaltic metering pumps to automatically deliver precise amounts of ink to the printers at
prescribed intervals.
The PIDS system works with the Non-Porous Web printers through a
unique wiper adapter as shown. Ink from the PIDS System is injected
through a pair of miniature duck bill check valves between two very thin
plastic membrane wipers which rest against the face of the ink roll. The
wipers transform the ink into a very thin film which is then evenly spread
across the entire face of the roll. This design provides instantaneous
printerresponse and ensuresuniform print densityover the fullprint width
of the printer .
Itis veryimportantto know that when web velocities exceed 400 FPM,having alarge volume of ink in the printer’s
ink roll can cause inking system leakage problems. The higher RPM of the ink roll at these web velocities will
cause ink to rise to the surface of the ink roll and can result in ink being thrown off the surface of the roll and into
the inking system housing. To avoid this potential problem in high speed printing applications, the ink roll should
bethoroughlysaturatedwithink,thenmostof the ink should be removed fromtherollpriortoinstallation. Saturating
the roll wets all the cells in the foam, while removing the air, which will dramatically increase the rate of ink
absorptionwhen the inkis delivered to the rollby the PIDS-DIGITAL-CESystem. It is importantto understandthat
the required amount of ink for printing will be delivered by the PIDS System as needed, so having a large volume
of ink in the ink roll is unnecessary and undesirable.
PIDS-DIGITAL-CE PROGRAMMABLE INK DELIVERY SYSTEMS
The PIDS-DIGITAL-CE Programmable Ink Delivery Systems require constant data input from a low resolution
encoder in order to monitor web motion and velocity. To eliminate the need to install a separate friction driven
encoderonthe moving web,it was determined thatthe most efficient wayto provide this data,without complicating
the installation, was to modify the friction driven printers which allows them to serve a dual purpose.
The details of this modification are provided on the following pages.
HIGH SPEED PRINTING APPLICATIONS

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BASIC PRINCIPLES OF OPERATION
ENCODER SENSOR FOR DIGITAL MODELS
The WPNP-400NI-12-PIDS-D Digital Printer has been modified to work with Universal’s new PIDS-DIGITAL-CE
Programmable Ink Delivery System. The PIDS Control System requires an encoder signal from the printer to
track web velocity and to enable programming based on web distance traveled. To eliminate the need to install a
separate,friction driven encoderon the movingweb, a simplelow resolutionencoder assembly hasbeen installed
on the printer.
The center hub of the print drum has four 0.250"
diameter steel targets installed which are sensed by
theinductive proximity sensor as theprintdrumrotates.
Warning: The inductive proximity sensorisavery fragile device andmustbehandled carefully to preventdamage.
The sensor extends out a short distance from the side frame of the printer to expose the internal LED lights and
enableconnection ofthe communication cable. When handling the printer,care must be taken not to damage the
exposed end of the sensor.
Aninductiveproximity sensor (A) ismountedin the side
frame of the printer through an electrically isolated
plastic bushing (B).
This design provides the PIDS Digital Control with the required 4 pulse per revolution encoder signal when the
printer is operating and also lets the control know when the web has stopped moving.
FIGURE34
When the sensor is threaded into the bushing and
adjustedto the correctposition,anylontippedsetscrew
(C) is used to prevent it from vibrating out of its proper
position.
B
A
C

17
2– Theinductive proximity sensor can now be rotated in either direction foradjustment purposesor rotatedin the
counter clockwise (CCW) direction and unscrewed completely from the bushing for removal.
3 – The Inductive Proximity Sensor has a very short distance sensing range and must be adjusted precisely for
proper operation, here is the easiest way to adjust this sensor. Position a 0.020" shim between the face of the
sensor and the hub of the print drum as shown in Figure 35. While holding the shim between these two surfaces,
turn the sensor Clockwise (CW) until the face of the sensor just pushes the shim into contact with the hub of the
print drum. When the sensor is in this position, slightly tighten the nylon tip set screw to prevent the sensor body
from turning. 4 - Connect the communication cable from the
PIDS Control to the sensor. Use your fingers
to prevent the sensor body from turning when
connecting the cable.
5 – Turn the control power on and rotate the
print drum by hand. When the sensor is
adjustedproperly, the LEDlights(visible on the
sensor body) will flash each time one of the
four steel targets in the print drum hub rotates
past the face of the sensor.
If the LED lights stay on constantly while
rotating the print drum, this means the sensor
isdetecting thealuminum hub. To correct this,
rotate the sensor body approximately 1/8 of a
revolution (CCW) until the LED lights only
come on when a steel target passes the
sensor’s face.
Note: You must very lightly tighten this screw, over tightening this set screw can damage the sensor.
If the LED lights do not turn on at all during print drum rotation, rotate the sensor body slightly (CW) until the lights
begin to flash when the steel targets pass the sensor face.
6 – When the sensor is working properly, slightly tighten the nylon tip set screw to prevent the sensor from
moving out of position.
FIGURE35
.020”
GAP
ADJUSTMENT OF THE INDUCTIVE PROXIMITY SENSOR
The inductive proximity sensor has been properly installed, adjusted and tested at the factory prior to shipment
and no further adjustment should be required. If for any reason the sensor needs to be readjusted, please read
the following instructions carefully.
1 - To remove or readjust the inductive proximity sensor, you must first slightly loosen the nylon tip set screw
which holds the sensor in position. Using a 5/64" hex driver, turn it approximately 1 revolution in the counter
clockwise direction. This set screw can be reached through the access hole in the top of the frame as shown in
Figure35. Youdo not need to takethe setscrew completelyout of the plastic isolator bushing, sowe recommend
you just loosen it enough to adjust the sensor. If you take the set screw completely out, it will be somewhat
difficult to reinstall.
MAINTENANCE
Note: The threaded body of the sensor has very fine 5mm x 0.5mm threads for accurate adjustment, removing
the sensor requires many revolutions before it will come free from the bushing.
NYLON TIP
SETSCREW

18
CLEANING THE PRINTER
MAINTENANCE
1 - Periodically, the inking system should be
disassembled and inspected for ink residue and dust
contamination. To remove ink contamination from the
surface of the machine, moisten a soft cotton cloth
with the appropriate ink solvent and rub it across the
contaminated area.
The surface of the transfer roll is made from DuPont Delrin material and the O.D. of the roll is finely engraved
which enables it to hold a uniform film of ink. This surface material is very fragile and under no circumstances
should you attempt to clean it with anything abrasive.
1 - To clean dust and ink residue from the surface of the
transfer roll, first remove it from the printer. Lightly
saturate a soft cotton cloth with the appropriate ink
solvent and gently rub the surface of the roll until it is
clean.
Warning: Most of the ink solvents used for cleaning are flammable liquids. Follow all safety precautions
recommended by the manufacturer during this process.
If the transfer roll is submerged in solvent, the
bearingswillbe permanentlydamaged.
The frequency of required cleaning can be greatly
reduced if the inking system is kept in proper
adjustment during normal operation and if the ink roll
doesnot becomeover saturated with ink.
DO NOT SUBMERGE THE TRANSFER ROLL IN SOLVENT!
CLEANING THE TRANSFER ROLL
FIGURE36
FIGURE37

19
3 - Blot the surface of the die with a clean paper towel to dry
and reinstall the clean dies on the printer.
1 - Place the contaminated Printing Die on top of several layers
of paper towels to absorb the excess solvent. Pour just
enough solvent on the face of the printing die to cover the
die face.
2 - Using the toothbrush, carefully scrub the face of the die
to remove any old ink and contamination as shown. Add
more solvent as necessary and repeat the process until
the die is clean.
Donotsubmerge or soakthedies insolventas this may
causeswelling of the rubber compound.
MAINTENANCE
CLEANING THE PRINTING DIES
FIGURE38
FIGURE39
FIGURE40
All inks which are formulated for printing on non-porous surfaces contain a resin binder which bonds the dye or
pigmentin the inkto thesurface of thematerial being printed. As the inkbegins to dry,this binder becomes “tacky”
or“sticky”. While inthis stage of the drying process, thetack onthe dieswill tend to pick up both airbornedust and
any dust or dirt on the surface of the material being printed. When this happens, the dies should be cleaned or
replaced. Theeasiest method ofcleaning the diesrequires the appropriatesolvent for theink being used,a pair of
rubber gloves, safety glasses, an apron to protect your clothing is recommended, a toothbrush, some clean paper
towels and a plastic bag to protect your workbench from staining. (Naturally, the toothbrush will never be suitable
for oral hygiene use after this process.)
After some period of use, the accumulation of contaminates on the dies will cause degradation of the print quality;
cleaning the printing dies will restore the print quality of the printer, excluding excessive wear to the die face.

20
WPNP-400NI-12-PIDS NON-POROUS WEB PRINTER
KEYNO. DESCRIPTION QTY. REQD.
PARTNUMBER
1
2
3
4
4”TRANSFERROLLASSEMBLY
1
WPNP-TRA-4
4”TRANSFERROLLAXLE
1
WPNP-009
KNURLEDDRIVEWHEELW/DELRINWASHER
1
NP-14
PIDS-60 WPNPINKINGSYSTEMCOVER,REMOVABLE
1
5
HP-04 13/8” BRASS, FLAT WASHER
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
10
9
8
19
18
15
17 16
14 13
12
11
65
4
3
21
7
39