Web Techniques WT-25LC Manuale utente

07-1036 Metric CDR

Owner's Manual and

Guide to Operations

MODEL WT-25LC & WT-25LCI

ROLL LABEL

REWIND MACHINES

910 Bolger Court, Fenton, MO 63026 (USA) (636) 343-0806 (800) 325-9777

IMPORTANT: Read all instructions before using.

07-1036

Table of Contents

Safety Instructions.......................................................... 1

Purpose (General Overview) .......................................... 1

Operator Controls (Web Transport System) .................. 1

Rewind Direction Switch ............................................ 1

Main Speed Control Knob........................................... 2

Start Pushbutton ........................................................ 2

Stop Pushbutton......................................................... 2

Idle Speed Control Knob............................................. 2

Power On/Off Switch (And Power Indicator) ............. 2

Unwind Tension Control............................................. 2

Coreholders .................................................................... 2

Lift-Off Cam-Lock Coreholders ................................... 2

Air Inflatable Coreholders (Optional) ......................... 3

Rewinding....................................................................... 4

Web Path Illustrations................................................ 4

Straightening .............................................................. 4

Counting System............................................................. 5

Programming Deceleration and Stop Points .............. 5

Determining Preset B (Stop Point) ............................. 5

Determining Preset A (Deceleration Count Setting) .. 5

Automatic Reset (Length Mode Only)........................ 6

Photoelectric Counting System ...................................... 6

Thru-Beam Scanner .................................................... 6

Capacitance Scanner (Optional) ................................. 6

Speed of Operation .................................................... 6

Accuracy of Counting.................................................. 6

Photoelectric Counting System Controls........................ 7

Stop at Preset/Bypass Preset Switch.......................... 7

Count Labels/Count Length Switch.............................7

Dark Energize/Light Energize Switch...........................7

Count Up/Count Down Switch ....................................7

Count/Standby Switch.................................................7

Manually Increment Counter Pushbutton ..................7

Sensitivity Adjustment ................................................7

Resetting The Counter ................................................8

Photoelectric Counting System Set-Up...........................8

SK1 Auto Adjust Thru-Beam Scanner Operation.........8

Adjusting Count at the Beginning of a Roll .................8

Detecting Punched Holes............................................9

Electrical Control Adjustments........................................9

Minimum Speed..........................................................9

Deceleration Rate........................................................9

Acceleration Rate........................................................9

Strobe Light Set-Up (Optional)........................................9

Set-Up..........................................................................9

Operation ..................................................................10

Procedure for Re-Programming WT-25 Series Counters

.......................................................................................10

Unlocking the Counter ..............................................10

Setting Scale Factors .................................................10

Setting Count Mode ..................................................10

Setting the Relay Operation......................................10

Setting the Counter Lock Code..................................10

Locking the Counter ..................................................10

07-1036

SAFETY INSTRUCTIONS

RULES FOR SAFE OPERATION

1. Know your machine. Read and understand the

owner’s manual and labels affixed to the machine.

Learn its applications and limitations as well as the

specific potential hazards peculiar to this machine.

2. Grounding. This machine should be grounded while

in use to protect the operator from electric shock.

Machines which are designed to run on less than

150 volts are equipped with a 3 conductor cord and

3 prong grounding type plug to fit the proper

grounding type receptacle. The cord is long enough

that it should not be necessary to use extension

cords. Temporary extension cords and receptacle

adapters should be used only until a properly

grounded outlet can be installed by a qualified elec-

trician. Use only a 3 wire extension cord of ade-

quate size to handle the rated full load current of

the machine as indicated on the machine name-

plate. If an adapter is used to accommodate a 2

hole receptacle, the grounding ear must be at-

tached to a known ground. Never remove the 3rd

prong (grounding blade) from the plug on the ma-

chine electrical cord.

3. Keep the machine guards in place and in good work-

ing order.

4. Avoid dangerous environments. Do not use the ma-

chine in a damp or wet location. Keep the work area

well lit.

5. Wear proper apparel. No loose clothing (i.e.

neckties) or jewelry to get caught in moving parts.

Wear protective covering to contain long hair.

6. Stay alert. Watch what you are doing. Use common

sense. Do not operate the machine when you are

tired. Do not use the machine after taking drugs, al-

cohol or medications.

WARNING

Machines equipped with strobe lights. These machines

emit a stroboscopic, flashing light. Viewing of this light

may trigger epileptic seizures in persons with photosen-

sitive epilepsy.

READ ALL INSTRUCTIONS AND SAVE THEM FOR FUTURE

REFERENCE.

PURPOSE (GENERAL OVERVIEW)

WT-25LC and WT-25LCI series rewind machines are

made for the purpose of rewinding rolls of narrow web

products. In general, these are paper, film or foil prod-

ucts which are stiff enough to stand on edge (vertically)

throughout the web path of the machine. Cloth and

other woven materials generally do not rewind well (if

at all) on vertical spindle rewind machines. Abrasive

materials (sandpaper rolls, etc.) will damage the ma-

chine and should not be used. The machines are

equipped with a counting system that can be set to

measure roll length or to photoelectrically count labels.

In addition, WT-25LCI machines are equipped with a

strobe light system to permit visual inspection of the

labels at high speeds. It is suggested that you take a few

minutes to become familiar with the controls and oper-

ating characteristics before attempting to rewind actual

rolls.

WARNING

AS WITH ANY MACHINE, CAUTION MUST BE EXERCISED

TO PREVENT INJURY. NEVER OPERATE THE MACHINE

WITH GUARDS REMOVED. THE CONTROL CABINET

DOOR MUST BE KEPT CLOSED (SECURED BY SCREWS)

EXCEPT WHILE INTERNAL ADJUSTMENTS ARE BEING

MADE. ALWAYS EXPECT THE MOTOR TO TURN ON

WHEN THE START PUSHBUTTON IS OPERATED.

CAUTION

BEFORE CONNECTING THE MACHINE TO A SOURCE OF

ELECTRICAL POWER, OPEN THE CONTROL CABINET AND

VISUALLY INSPECT THE CONTROL PANEL TO BE SURE

THAT NO COMPONENTS OR WIRE CONNECTIONS HAVE

WORKED LOOSE IN SHIPMENT. WHEN INSPECTION IS

COMPLETE, CLOSE AND SECURE THE CABINET DOOR.

OPERATOR CONTROLS (WEB

TRANSPORT SYSTEM)

REWIND DIRECTION SWITCH

This switch determines the direction of rotation of the

rewind coreholder. When in the “PRINTING OUT” posi-

tion, the coreholder will turn in a counterclockwise di-

rection for winding with the labels on the outside of the

roll. In the “PRINTING IN” position, the rewind core-

holder will turn clockwise for winding labels on the in-

side of the roll.

07-1036

MAIN SPEED CONTROL KNOB

Located next to the start pushbutton, the main speed

control knob is used to set the running speed before the

deceleration count is reached. Turning the knob clock-

wise will increase the speed. Rapid speed increases can

cause telescoping of the rewind roll and web breakage.

Therefore, the motor control has been pre-adjusted to

accelerate at an appropriate rate.

START PUSHBUTTON

Pressing of the START pushbutton will perform two

tasks. Most importantly, the motor control is enabled,

permitting the motor to run at the set speed. In addi-

tion, when operating the counting system in the length

mode, the START pushbutton will also reset the counter

to zero if the counter stop setting (Preset B) has been

reached. Automatic reset to zero does not take place in

the photoelectric counting mode because the operator

may have already set an initial count into the counter to

account for labels that have passed the scanner.

STOP PUSHBUTTON

The STOP pushbutton provides rapid stopping of the

machine. When pushed, the main drive motor is turned

off and dynamic motor braking is applied. Although it is

also possible to stop the machine by turning the speed

control down to zero, it is recommended that the STOP

pushbutton be used to insure that the machine will not

start again until desired.

IDLE SPEED CONTROL KNOB

The idle speed control knob is located on the control

cabinet on the far right hand side of the machine. When

the deceleration preset number (Preset A on the coun-

ter) is reached, provided you have the STOP AT PRE-

SET/BYPASS PRESET switch in the “STOP AT PRESET”

mode, the motor control will automatically switch from

the main speed control knob to the idle speed control

knob. The speed range of this knob is restricted to only

the lower twenty percent of the speed range. Once the

counter has been reset, the main speed control knob is

reactivated.

POWER ON/OFF SWITCH (AND POWER

INDICATOR)

The POWER ON/OFF switch is used to turn the main

power to the machine on and off. The switch has an

indicator light that illuminates when power is on.

UNWIND TENSION CONTROL

The unwind brake is a mechanical friction type consist-

ing of a brake band wrapped around a drum. An ad-

justing knob on the front of the machine provides a

means of tightening the brake band. Turning the knob

clockwise increases the unwind brake tension. To set

the brake initially, turn the unwind coreholder manually

and adjust the brake tension until a slight amount of

drag can be felt when turning the coreholder. When the

machine is running, make small adjustments as required

to obtain the desired web tension.

COREHOLDERS

Web Techniques rewind machines are available with

various types of coreholders. Lift-off cam-lock core-

holders are supplied as standard equipment. Air inflat-

able coreholders are available as an option. In addition,

some machines are configured with a combination of

both systems (usually a lift-off cam-lock coreholder on

the unwind and an air inflatable coreholder on the re-

wind). An air inflatable coreholder is required on the

rewind position in order to use an optional slitting

attachment.

LIFT-OFF CAM-LOCK COREHOLDERS

As the name implies, these coreholders can be removed

from the machine by simply lifting them straight up

from the table top and out of their sockets. The ad-

vantage of this type of coreholder is that heavy rolls can

be installed and removed by sliding them onto and off

the machine. If your machine is equipped with lift-off

cam-lock coreholders, they will be packaged separately

and must be installed on the machine.

A) Locate the package containing the coreholders. Ob-

serve that there is a slotted shaft protruding from

the lower end of the coreholder.

B) GENTLY lower the shaft into the socket in the un-

wind and rewind spindle. The shaft will probably

come to rest on top of the drive pin inside the spin-

dle and the bottom of the coreholder will be ap-

proximately 3/8 inch above the table top. Simply ro-

tate the coreholder until the drive pin and slot align

and the coreholder drops the rest of the way into its

socket.

C) Remove and install the coreholder several times so

that you become familiar with the “feel” of proper

coreholder engagement. This is important because

when the coreholder is installed by inserting it

through the core of a roll of material, you will not

07-1036

be able to see that it is fully engaged and will have

to rely on feel.

CAUTION!!

DO NOT lay the coreholder on its side on the table top

when it is removed to change rolls or it may roll off and

become damaged. There is a hole in the table top

immediately to the right side of the pedestal mounted

counter. The purpose of this hole is to provide a place

to store coreholders when changing rolls.

D) Tightening and loosening of the cores is accom-

plished by turning the core on the coreholder. This

causes the cam to rotate and wedge against the in-

side of the core. To install a core, rotate the cam

until it is flush with the body of the coreholder.

Slide the core over the coreholder until it is resting

flat on the table. Twist the core until it locks on the

coreholder.

In actual operation the cores will usually lock

themselves once the rewind starts to turn.

However, locking them by hand is preferred be-

cause the web can be drawn tight before starting

the machine, thus reducing the chance of web

breakage. Since the cams will lock regardless of

which way they are turned, it is important that they

be turned the right way or they will again loosen

once web tension is developed. There are two basic

rules for determining which way to rotate the cams

to lock the cores:

(1) On the unwind, the cam should be rotated in

the direction the roll will be turning (usually

counter-clockwise).

(2) On the rewind, the cam should be turned oppo-

site to the direction of rotation (usually clock-

wise).

Until you become familiar with this operation, it

may be desirable to mark the top of the coreholder

with an arrow to indicate the lock and unlock

directions. When a full roll is wound it can be

difficult to determine which direction it should be

rotated to release it from the coreholder. The two

rules to remember to loosen a core are:

(1) On the rewind, turn the core in the direction in

which the roll was wound (normally counter-

clockwise).

(2) On the unwind, turn the core in a direction

opposite to the direction in which the roll was

turning (normally clockwise)

NOTE

An alternate method of loosening the roll on the rewind

is to hold the roll tight against the top of the table and

turn the coreholder in the direction opposite to the way

it was running.

AIR INFLATABLE COREHOLDERS (OPTIONAL)

Air inflatable coreholders offer the advantage of ex-

panding concentrically over their full length simply by

flipping a switch. Machines which are equipped with a

slitting attachment require this type of coreholder sys-

tem on the rewind. That is so that ganged cores (one for

each slit web) can be individually gripped and driven.

Machines that have been equipped with air inflatable

coreholders require connection to a supply of air pres-

sure. A quick disconnect fitting has been provided for

this purpose (located on the back of the machine just to

the rear of the main drive motor). A mating female dis-

connect is supplied as a convenience in hooking up air.

The machine should be connected to an air source ca-

pable of supplying at least 50 psi. Individual regulators

on the machine allow the operator to adjust the pres-

sure between zero and 50 psi. Very narrow cores re-

quire only a small amount of pressure as excessive pres-

sure may burst the core. The coreholders can then be

inflated and deflated by means of toggle switches lo-

cated next to the pressure regulators.

CHANGING FROM 3-INCH TO 1-INCH AIR INFLATABLE

COREHOLDERS

A) Make sure that the coreholder is deflated.

B) Grasp the coreholder with one hand while loosen-

ing the socket head bolt in the center of the top of

the coreholder.

C) Lift the coreholder from the reroll table.

D) Loosen the four screws and remove the three-inch

coreholder adapter from the rewind spindle.

E) To insure that the adapter and retaining screws are

not lost, assemble the adapter onto the three-inch

coreholder.

F) Insert the one-inch coreholder into the hole in the

rewind spindle and align the mounting holes with

the holes in the flange.

G) Place the one-inch coreholder retaining ring on top

of the coreholder flange and install the four retain-

ing screws.

H) Check the operation of the coreholder by inflating

and deflating.

07-1036

REWINDING

Learning to use the rewind machine should be accom-

plished in steps. Each step will build upon the previous

step. This will be more efficient than trying to learn how

to do everything at once. The first step will be learning

to thread the machine and operate the motor control to

wind rolls. Once you understand how to do that, you

can move on to setting up the counting system to

measure roll length or count labels. If you have a model

WT-25LCI, you can then learn the operation of the

strobe light.

A) Set the STOP AT PRESET/BYPASS PRESET switch on

the label counting system to the “BYPASS PRESET”

position (this is the leftmost rocker switch on the

label counting system panel). This will make it pos-

sible to operate the machine regardless of how the

counter system is set up.

B) Turn the main power ON/OFF switch to the “ON”

position.

C) Install a roll of labels on the unwind. Pull the free

end of the material off the roll until the coreholder

locks. Thread the material as shown in Figure 1A

(WT-25LC) or Figure 1B (WT-25LCI).

D) Install a fresh core on the rewind and fasten the

free end of the web to the core with tape.

E) Check the position of the following switches:

SWITCH

POSITION

STOP/BYPASS PRESET

BYPASS

REWIND DIRECTION SWITCH

AS REQUIRED

MAIN SPEED CONTROL

MINIMUM

IDLE SPEED CONTROL

MID RANGE

WEB PATH ILLUSTRATIONS

Figure 1A Web Path for WT-25LC Models

Figure 1B Web Path for WT-25LCI Models

F) Press the START button. Gradually increase the

speed setting until the web begins moving.

G) With the machine running slowly, push against the

face of the web between the last idler roll and the

rewind to determine the web tension. Adjust the

unwind brake tension as necessary to produce the

desired rewind tension.

H) Continue to increase the speed setting until the

machine is running full speed. Then try reducing the

speed. If the web begins to go slack and form a loop

on the top of the machine, the unwind tension is set

too low. Increase the tension to a point where the

web remains stable during acceleration and decel-

eration cycles.

I) Press the STOP button to stop the machine.

STRAIGHTENING

If the rewound roll is not straight due to splices or any

other cause, it may be straightened easily as follows:

A) Place the REWIND DIRECTION switch in the oppo-

site position.

B) Grasp the outer wrap of material on the rewind and

start the machine running very slowly.

C) Allow the roll to expand as it turns in the reverse

direction.

D) Once the roll is loosened all the way to the defect,

stop the motor.

E) Reverse the DIRECTION SWITCH and re-tighten the

roll.

07-1036

COUNTING SYSTEM

The rewind machine incorporates a bi-directional dual

preset counter. This permits the operator to set sepa-

rate deceleration (Preset A) and stop (Preset B) points.

The counting system can be operated in either the pho-

toelectric counting mode or the length counting mode.

In the length counting mode, the counter is driven by

means of two magnetically operated proximity switches

located in the table top beneath the counter drive roll.

A magnet in the lower end of the counter drive roll op-

erates the proximity switches. The combined signals

from each proximity switch allow the counter to auto-

matically count up or down depending on the direction

of rotation of the counter drive roll. This is primarily

used when pulling defective material backwards off the

rewind roll. Be sure the web is held against the counter

drive roll when it is pulled backwards. When counting

photoelectrically, the operator must place the COUNT

UP/COUNT DOWN switch in the “COUNT DOWN” posi-

tion before pulling the labels backwards. The switch

must be returned to the “COUNT UP” position before

moving the labels forward again. The MANUALLY IN-

CREMENT COUNTER pushbutton will illuminate when

the COUNT UP/COUNT DOWN switch is in the “COUNT

DOWN” position in order to remind the operator that

the counter is set for counting backwards and that the

switch must be placed in the “COUNT UP” position be-

fore resuming operation.

PROGRAMMING DECELERATION AND STOP

POINTS

To set the final count, press the PRE B button on the

counter once. In approximately two seconds the current

value will be displayed. To change the value, simply

press the button under the digit that you wish to

change. Each time the button is pressed, the digit will

increment by one. When the desired value has been set,

push ENTER once to store the value into memory. To set

the count at which you wish the machine to go into the

deceleration mode, push PRE A and follow the same

procedure as described above. If you do not wish to

have a deceleration period, simply set the final count

Preset B as normal and set Preset A to any number

larger than Preset B.

NOTE

All Rewind Machines are equipped with an electronic

programmable counter. This counter is quite sophisti-

cated and is capable of performing certain functions not

applicable to our usage. While programming the coun-

ter, you will notice “LoC” will appear. This is to let you

know the manufacturer has programmed the counter to

deny access to the functions not required for our

application.

While it is possible for the counter program to become

scrambled (possibly due to line noise, electrical storms,

etc.), it is important to note that this will disable the

counter from performing as it should. In order to cor-

rect the situation, the counter will need to be re-pro-

grammed. For your convenience, we have provided re-

programming instructions located in the final section of

this manual in the event that this occurs

DETERMINING PRESET B (STOP POINT)

LENGTH MODE COUNTING

The counter registers one count per ten inches of web

travel when using the standard ten inch circumference

counter drive roll. This makes it easy to calculate the

appropriate number to enter into the counter in order

to wind a roll of a given number of labels. The number is

calculated as follows:

𝐂𝐨𝐮𝐧𝐭 = (𝑵𝒐.𝒐𝒇 𝒅𝒆𝒔𝒊𝒓𝒆𝒅 𝒍𝒂𝒃𝒆𝒍𝒔)(𝒓𝒆𝒑𝒆𝒂𝒕 𝒍𝒆𝒏𝒈𝒕𝒉)

𝟏𝟎

EXAMPLE: To wind a roll of 1000 labels of 3 inch repeat

length, the number 300 would be entered as the final

count (Preset B).

𝐂𝐨𝐮𝐧𝐭 = (𝟏𝟎𝟎𝟎)(𝟑)

𝟏𝟎 =𝟑𝟎𝟎

LABEL COUNTING MODE

Every label is counted as it passes through the scanner.

No calculations are required. Set Preset B to the desired

total label count.

DETERMINING PRESET A (DECELERATION COUNT

SETTING)

The point at which deceleration should begin depends

on many factors (rewind speed, finished roll diameter,

etc.). Therefore you probably will need to test your de-

celeration count setting each time you rewind a new

type of label. The desired technique is to have the ma-

chine stop shortly after it decelerates fully and has sta-

bilized at the lower speed. For the first attempt try a

setting that is 150 counts less than the final count. This

means that the counter will begin to decelerate the

machine 150 counts (15M) before the end of the roll.

EXAMPLE: If the final count (Preset B) is 750, then the

deceleration count (Preset A) should be set at 600.

07-1036

AUTOMATIC RESET (LENGTH MODE ONLY)

After winding a roll (and reaching the final preset num-

ber), the counter will reset to zero automatically when

the start pushbutton is pressed to start a new roll. This

is the only time automatic resetting can occur. Counting

will proceed normally each time the machine is stopped

and started (without resetting) until Preset B has been

reached. You may reset the counter to zero at any time

by pushing the “RST” button on the counter.

PHOTOELECTRIC COUNTING

SYSTEM

THRU-BEAM SCANNER

The photoelectric counting system has been designed

to operate with several types of scanners. For most

pressure sensitive labels, a thru-beam scanner is the

logical choice. This is the easiest type of scanner to set

up and use. A thru-beam scanner is supplied as stand-

ard equipment (unless the machine is ordered with an-

other type of scanner in place of the thru-beam scan-

ner). Labels on a liner material (with a space between

each label) can be detected by sensing the difference in

thickness of the web (due to the difference in light pen-

etration ability). A light source is placed on one side of

the web and a photocell on the other. Signals from the

photocell are processed by an amplifier circuit which

functions as an output switch to drive an electronic

counter. The number of labels passing the photocell are

thus registered on the display of the counter.

CAPACITANCE SCANNER (OPTIONAL)

A capacitance type scanner is available for use when

thru-beam scanning is not possible. A typical example is

when counting clear labels on a clear liner. The capaci-

tance scanner uses a non-contact electronic probe to

detect the presence of labels. The capacitance scanner

will not detect cross scored labels or other labels that

do not have a space between them. The sensor is not

recommended for use with "conductive" inks, i.e., me-

tallic, carbon filled, etc. Please refer to the LRD Scanner

Supplemental Instructions, if this optional scanner was

purchased for use on a WT-25LC/LCI Rewind Machine.

SPEED OF OPERATION

Because of the variations in each application it is impos-

sible to guarantee a maximum speed of operation. Such

things as color, intensity, contrast, target size, etc. all

play a significant role in the speed with which labels can

be accurately counted. However, the counter system is

capable of accurately detecting and counting high con-

trast targets ⅛ inch wide at maximum machine speed.

ACCURACY OF COUNTING

Under normal conditions, a properly trained and disci-

plined operator using well organized methods and

techniques can obtain 100% accuracy using the photo-

electric counting system. However due to circumstances

beyond its control, Web Techniques, Inc. can make no

guarantees as to the accuracy of count. The following

factors which can affect accuracy should be kept in

mind when using the photoelectric counting system:

1) DISTANCE FROM THE PHOTODETECTOR TO END OF

OPERATION. For example, if the counting system is

used to count the number of labels on a roll, it is

important to consider the number of labels that

have already passed the scanner location during the

threading operation.

2) OPERATIONS TAKING PLACE DOWNSTREAM FROM

THE PHOTODETECTOR. Allowance must be made for

splicing and other operations that affect labels

which have already been counted.

3) SPLICES IN THE WEB. If the roll contains splices,

these may each be mistaken for a label and counted

as such.

4) TAPE AT END OF THE ROLL. It is a common practice

to tape the end of the web to the core on which it is

wound. If the tape is not transparent and is in the

path of the scanner, it may be counted as a label.

Also, even if the tape is clear, if paper cores are

being used, the tape may lift off part of the paper

core which may then be counted.

5) PRINTING ON THE LINER OF CERTAIN PRESSURE

SENSITIVE MATERIALS. Many label stock manufac-

turers print patterns or their trade name on the

liner of pressure sensitive stocks. When the thru-

beam scanning method is used to count labels, this

printing may be detected. Usually careful adjust-

ment of the sensitivity control can eliminate this

problem.

6) IMPROPER SET-UP OF THE COUNTING SYSTEM. Care

must be exercised in adjusting the automatic sensi-

tivity control properly. With proper adjustment, the

photoelectric devices can be made to ignore such

problems as flutter in the web.

7) ELECTRICAL INTERFERENCE FROM NEARBY EQUIP-

MENT. The photoelectric counting system incorpo-

rates sensitive logic gates which can be affected by

electrical noise. Filtering has been employed to the

extent that it could be, without reducing the speed

of operation. If random counts are observed when

07-1036

adjacent machinery is operated, noise suppression

should be applied at the source.

8) SPEED AFFECTS REFLECTIVE SCANNERS. Under cer-

tain conditions, it may be necessary to operate the

machine at a slower speed for accurate counting.

PHOTOELECTRIC COUNTING

SYSTEM CONTROLS

Figure 2 Counter Package

STOP AT PRESET/BYPASS PRESET SWITCH

The counter is a predetermined counter which can be

used to stop the machine at any preset count up to

99999. When the switch is in the “STOP AT PRESET” po-

sition the counter will provide deceleration and stop

signals. If the machine is running fast enough that addi-

tional labels pass the scanner while stopping, the addi-

tional labels will be counted. In the “BYPASS PRESET”

position, the counter will continue counting and the

machine will not decelerate or stop.

COUNT LABELS/COUNT LENGTH SWITCH

This switch allows the operator to select one of two

modes of counting. In the length mode the counter in-

dicates the length of web that has passed through the

machine. In the label mode, individual labels may be

counted.

DARK ENERGIZE/LIGHT ENERGIZE SWITCH

This switch controls the mode of operation of the pho-

toelectric amplifier. In the DARK ENERGIZE position, the

counter will add one count each time the photocell has

detected a label or printed mark. In the “LIGHT ENER-

GIZE” position, the counter will add one count each

time a punched hole has been detected (light emitted

through the hole). Note that it is normal for the counter

to add one count each time this switch is operated. Be

sure to reset the counter after selecting the proper

mode.

COUNT UP/COUNT DOWN SWITCH

This switch only functions in the photoelectric counting

mode (bi-directional counting is automatic in the length

mode). Placing the switch in the “COUNT DOWN” posi-

tion causes the counter to subtract counts each time a

label passes through the scanner. In order to remind the

operator that the switch is in the “COUNT DOWN” posi-

tion, the MANUALLY INCREMENT COUNTER pushbutton

will illuminate. Whenever the button is illuminated, the

MANUALLY INCREMENT COUNTER pushbutton will sub-

tract one count from the counter each time it is pushed.

Normal counting is restored when the switch is placed

in the “COUNT UP” position.

COUNT/STANDBY SWITCH

The COUNT/STANDBY switch is used to disable the

counter. When placed in the “STANDBY” mode, the

counter will ignore signals from the scanner. This is

useful when making splices or removing bad material

from a roll.

MANUALLY INCREMENT COUNTER PUSHBUTTON

This pushbutton allows the operator to add to the count

(one count each time the pushbutton is depressed). This

feature is used at the start of a roll to record any labels

that have already passed the scanner location. The

pushbutton can also be used to subtract counts (such as

when a counted label is removed) by first operating the

COUNT UP/ COUNT DOWN switch.

SENSITIVITY ADJUSTMENT (USED WITH SCANNERS

WHICH REQUIRE AN EXTERNAL SENSITIVITY

ADJUSTMENT)

The thru-beam and capacitance type scanners used

with WT-25LC/LCI machines have built in sensitivity

controls. The sensitivity adjustment on the counter

package is not used with these devices and it does not

matter where the knob is positioned. On occasion, a

special scanner which requires an external sensitivity

adjustment (i.e., a reflective scanner) may be used for a

unique application. The sensitivity adjustment is used

with these types of scanners to adjust the gain of the

photoelectric amplifier. When properly set, the output

of the amplifier will turn off when no label is present

and turn on when a label is detected. When detecting

holes, the adjustment should be set so that it does not

07-1036

RESETTING THE COUNTER

When operating in the photoelectric counting mode,

the counter must be manually reset to zero by means of

the “RST” button on the counter.

PHOTOELECTRIC COUNTING

SYSTEM SET-UP

A) An extended idler roll shaft has been provided for

mounting the scanner on the idler roll closest to the

front of the machine. Install the scanner assembly

on the extended idler roll shaft. The scanner should

be positioned so that it is located in the web path

between the two idler rolls.

B) Connect the plug from the scanner to the scanner

socket on the counter. Note that the plug is polar-

ized so that it can only be inserted when it is

properly aligned with the socket.

C) Turn the POWER “ON/OFF” switch to the “ON” posi-

tion. If the counter does not register zero, press the

counter reset button to zero the counter.

D) Place the COUNT LABELS/COUNT LENGTH switch in

the “COUNT LABELS” position and the

COUNT/STANDBY switch in the “COUNT” position.

SK1 AUTO ADJUST THRU-BEAM SCANNER

OPERATION

The SK1 scanner is an optoelectronic slot sensor that is

used for detecting pressure sensitive labels on a liner

that have a space between them. The sensor has an au-

tomatic adjustment feature to set its sensitivity for de-

tecting labels. The scanner does not require any mainte-

nance other than to periodically clean the optical sensor

with a soft cloth and check that the electrical connec-

tions remain tight.

NOTE

The following procedures assume that it is desired to

count pressure sensitive labels on a liner where there is

a gap between labels. A discussion of the procedure for

counting labels with punched holes will follow.

A) Place the DARK ENERGIZE/LIGHT ENERGIZE switch

in the “DARK ENERGIZE” position.

B) Observe the LED's (visible in the window next to the

"Auto Adjust" button) when no material is within

the slot sensor. The green LED should be illumi-

nated. If the red and green LED's are both illumi-

nated, the scanner is "locked" in a previous setting

and automatic adjustment will not take place. If the

scanner is locked, depress and hold the "Auto Ad-

just" button on the side of the sensor for six (6) se-

conds to unlock the scanner.

C) Place a strip of label material into the slot of the

scanner. Align scanner in the center of the gap

between the labels until the green led comes on.

D) While observing the LED's, press the "Auto Adjust"

button until both the red and green LED's illuminate

-- then release the button. The red LED will begin to

blink indicating that the scanner is learning the

transparency of the liner material. After the liner

transparency has been learned, the red LED will

turn off and the green LED will turn on.

E) Move the strip of labels until a label enters the sen-

sor slot. The green LED will turn off each time a la-

bel is present and will turn on again as the gap be-

tween labels passes through the sensor.

NOTE

1. The sensor learns the degree of transparency of the

liner material. When a label passes through the scanner,

the transparency decreases. The scanner is normally

sensitive enough to detect the label material even if

there is no printing on the label. In some instances

(where there is only a small difference in contrast be-

tween the label (target) and the liner), it is necessary to

use the "Precise Sensitivity Setting" of the scanner. This

is accomplished the same as in steps B-E above except

that instead of pressing the "Auto Adjust" button one

time (in step D), the button should be released briefly

when the red LED first turns on, and pressed again a

second time within one (1) second. The green LED will

begin to blink indicating that the scanner is learning the

transparency of the liner material. If the button is not

pushed a second time before the LED begins blinking,

the "standard" sensitivity setting will be made rather

than the "precise" sensitivity setting.

2. If the yellow and red LED's blink simultaneously, the

liner material is not sufficiently transparent or the con-

nection cable has a short circuit.

3. The sensor remembers the last sensitivity setting

when power is turned off. However, to ensure accurate

counting, the "Auto Adjust" procedure should be com-

pleted each time a different type of label is being

counted.

ADJUSTING COUNT AT THE BEGINNING OF A ROLL

Count the number of labels between the photocell and

the beginning of the roll (DO NOT count the label that is

inside the scanner--it will be counted when it passes the

scanner). Set the LED display (count) so that it registers

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