All parts on stretchwrappers manufactured by Wulftec International Inc. (hereinafter called
“Wulftec”) are warranted to be free of manufacturing defects for a period of four (4) years from the
date of shipment, if installed, maintained and used in accordance with factory specifications except
for the two (2) blue polyurethane coated rollers whose coating carry a lifetime warranty and the 25”
ring gear bearing which carries a ten (10) year warranty. Wulftec will, at its discretion, repair or
replace any defective stretchwrapping parts returned freight prepaid. All returned parts are subject
to factory inspection and Wulftec reserves the right to determine the cause of failure. Damage caused
by inadequate supply voltage, misuse, neglect or corrosive environment, is not covered by this
warranty. Damage caused during transport is the responsibility of the carrier and is not
covered under this warranty. All damages detected upon receipt of equipment should be
reported immediately to the carrier and Wulftec should be notified. This warranty only applies
if machine start-up, modifications or repairs are made by an authorized Wulftec technician.
Wulftec shall under no circumstances be liable for any
direct, indirect, special, incidental,
consequential
damages, losses or expenses arising in connection with the use of, or inability to use, our product(s)
for any purpose whatsoever. Except as stated herein, Wulftec makes no other warranty, expressed or
implied, nor does it assume or authorize anyone else to assume for it, any other obligation relating to
our products or any other products. This warranty does not apply to machinery or equipment
deemed by Wulftec to have been subjected to misuse, neglect, or that has been started-up, repaired
or altered by unauthorized personnel. Defective parts must be returned to Wulftec within thirty (30)
days of shipment of a replacement and must be returned prepaid and in their original state. Failure
to do so will void this warranty. Defective parts that have been disassembled, damaged during
removal or otherwise tampered with will not be covered under this warranty, unless otherwise stated
in writing by Wulftec. Wulftec makes no guarantee as to the appropriateness of equipment for
particular purposes. Products serviced and/or parts replaced during the warranty period will carry
the unexpired portion of the original warranty only. The sole obligation of Wulftec under this
warranty will be to provide repairs to stretchwrapping components or replacement parts, ex-works
Wulftec.
Parts Return
Within Canada
Wulftec International Inc.
209 Wulftec Street,
Ayer’s Cliff, Québec
J0B 1C0
1-877-WULFTEC
Within the United States
Wulftec International Inc.
Fedex Trade Networks
30 Phelps St
Derby Line, VT 05830
Disclaimer
Wulftec has taken every precaution in the preparation of this manual to ensure its accuracy.
However, this information is subject to change without notice and is provided "as is" with no
guarantee. Wulftec shall not be held liable for any direct, indirect, special, incidental or
consequential damages in connection with the use of the information contained in this manual.
Manual Copyright
No part of this manual may be reproduced, in any form, whether in whole or in part without the
written permission of Wulftec. “WULFTEC”, “RUN WITH THE PACK”, “RUN AHEAD OF THE PACK”,
“No-Thread® Powered pre-Stretch” and “Rapid-Thread™” are trademarks of Wulftec. No trademark
license is granted in connection with the material contained in this manual.
Wulftec / M.J. Maillis Group
Page 4 of 36
Version 1.1.1 /May 2013
Page 5
Safety Labels
In an effort to reduce the risk of injury to personnel working around the Wulftec / MJ
Maillis equipment, safety labels are placed at various points to alert them of potential
hazards. Please check equipment and note all safety labels. Make sure your personnel are
vigilant and obey these warnings. Shown below are typical labels that are attached to the
equipment.
PLACED ON ALL MOVING PLATEN, NEAR DRIVE.
PLACED ON ALL CONTROL PANELS.
PLACED ON ALL CONTROL PANELS.
PLACED ON AUTOMATIC MACHINE CONTROL PANELS.
PLACED ON ALL CONVEYORS.
PLACED ON ALL POWERED CONVEYORS, NEAR DRIVE.
Wulftec / M.J. Maillis Group
Page 5 of 36
Version 1.1.1 /May 2013
Page 6
Safety Labels (cont’d)
NOTE: SPANISH, FRENCH AND PORTUGESE LABELS ARE AVAILABLE UPON REQUEST.
PLACED ON ALL MACHINE LEGS & TOWER
Wulftec / M.J. Maillis Group
Page 6 of 36
Version 1.1.1 /May 2013
Page 7
Safety
Read Carefully Before Operating
Any Wulftec Machinery
Wulftec stretch wrap machinery should be handled with the same caution and care as with any
other industrial equipment. Many automatic functions may be potentially hazardous. For this
reason, except for the authorized operator(s) and maintenance crew, other personnel should keep
clear at all times. It is especially important to be aware that mechanical or electrical components
may suddenly become active when the electrical panel is turned on.
Unstable loads being wrapped at high speeds are liable to fly apart and cause machine damage or
personal injury. For this reason, it is suggested that whenever attempting to wrap a "new" load
configuration, all personnel should be well clear of the wrapping area. The load should not be
wrapped at a higher speed than the machine was designed to handle (rotation speed: 17 RPM).
Always assume the machine is in an active mode. Disconnect control power prior to servicing,
adjusting or performing routine maintenance procedures.
WARNING!
Unless specifically stated, preceding all instructions in this manual, it must be well
understood that all inspection, maintenance, and repair should be performed only
when the electrical power is disconnected from the machine.
Please use extreme caution if it should become necessary to inspect, diagnose, or adjust the machine
while it is in operation. Only qualified individuals thoroughly familiar with the particular machine
should perform regular maintenance or inspections.
WARNING! Disconnect machine power supply before loading film.
Wulftec / M.J. Maillis Group
Page 7 of 36
Version 1.1.1 /May 2013
Page 8
D
Inspection and Installation
Upon Arrival, visually inspect machine for damage caused in transport. If damage to the machine
has occurred, it must be reported to the freight carrier immediately and Wulftec notified. As stated
in warranty on page 5, Wulftec is not responsible for damage caused in transit. If no damage is
apparent, carefully remove all wrapping material, strapping, blocks, etc.
NOTE: Wulftec WRT Wrap Machines series are to be lifted for placement only by
the lifting tubes with an overhead crane, pulley blocks or forklift of at least twentyfive hundred (2,500) pounds lifting capacity
Lifting points identification
A. Lift here with overhead crane to remove skid.
B. Shipping bracket.
C. Bottom brackets
D. Cross member
E. Lag bolts.
F. Lift here with forklift.
B
A
Figure 1 Installation of a WRTA 150
Unpacking procedure
1. Remove lag bolts holding skid together. (10 pieces)
2. Leave cross member attached to machine. (1 piece) and lift machine from side with strap as
shown to remove skid, then set machine down on floor.
3. Insert forks as far as possible into lifting tubes. (See forklift requirement above).
4. Lift machine while moving forward until machine is in vertical position.
5. Lift machine above floor and remove bottom brackets.
6. Move machine to desired location and anchor to floor.
7. Unwrap carriage and install safety bumper and photoeye bracket.
8. Remove shipping bracket.
NOTE: Because of machine configuration, in various circumstances, some of the
elements of the machine may need to be disconnected. Please follow
instructions/indications on elements and/or relevant diagrams to reconnect.
C
E
NOTE: Wulftec recommends using 10 heavy-duty expansion shields of ¾”
diameter thread size with a minimum length of 4” as a minimum anchor in
concrete. The clamp needs to be anchored with 2 anchor nuts of ½” diameter.
F
Wulftec / M.J. Maillis Group
Page 8 of 36
Version 1.1.1 /May 2013
Page 9
Inspection and installation (cont’d)
Lifting points identification
A. Remove transportation plate that is found
here.
B. Anchoring holes.
1-Mechanical anchors: KB ¾” Ø from Hilti,
4” minimum engagement into concrete.
2-Chemical anchors: threaded rod ¾” Ø, Gr:
2, Epcon system, 3 ½” minimum
engagement into concrete.
Verification of the structural capacity of the
floor to be done by others
Figure 2 Anchoring points for a WRTA 150
A
B
Note: The type of anchors for the Control Panel and Clamp (if applicable) is to the customer’s
discretion.
This machine needs to be connected to a dedicated line. A dedicated line is a line that is powered
from one breaker or fuse, and that has no other device connected to it. Furthermore, the line shall
be such that the voltage at the outlet will not drop more than 5% under full load. Use of extension
cords is not recommended.
To measure the voltage drop, measure the voltage at the outlet with nothing connected to it this is
VA, then measure the lowest voltage during machine operation. Please read during the complete
cycle and note the lowest value, this is VB.
Take the difference between VA and VB and divide it by VA. This will give you the voltage drop
percentage. Drop= (VA-VB)/VA. This drop should remain under 5% for proper machine operation,
and for compliance with the electrical code.
As an example, an outlet connected to a 15A breaker, wired with #14AWG wire, should not be
further than 70' from the breaker, to meet the 5% voltage drop.
NOTE: Because of machine configuration, in various circumstances, some of the
elements of the machine may need to be disconnected. Please follow
instructions/indications on elements and/or relevant diagrams to reconnect.
Wulftec / M.J. Maillis Group
Page 9 of 36
Version 1.1.1 /May 2013
Page 10
Inspection and installation (cont’d)
1
Installation of Fence Handle
See the following drawings in order to facilitate the installation of the handle on the safety fencing.
Refer to assembly drawing 6MFEN00496.
1: Clamp key switch plate in place with edge, flush with post. Transfer holes approximately center of
slot for adjustment. Drill 9/32” hole through post. Install key switch with carriage bolts.
Align slide bolt with key switch. Shims must pinch door panel angle iron. Tighten nuts.
Wulftec / M.J. Maillis Group
Page 10 of 36
Version 1.1.1 /May 2013
0MINS00006, rev. 1
Page 11
Film Loading and Threading
The film roll should be loaded so that the tacky surface will face inward on the pallet load.
1. *Make sure the machine is in stop mode before opening the fencing door. Do not press on E-stop.
2. *Open safety fencing door (if applicable).
3. Push the lock on the carriage gate latch to unlock carriage door.
4. Remove empty film roll.
5. Ensure that the inner core of the new film roll is undamaged. If the lower (bottom) of the inner
core is damaged or somewhat unwound, trim or shave it with a sharp knife.
6. Lift the film roll and make it slide along the film support roll. Then move the bottom of the film
roll over the bottom cone film roll holder to ensure that the roll is securely in place.
7. Pull the film from the roll until a good film web is reached, cut the film and discard the damaged
portion.
8. Pull out the film manually; ensure enough length to reach the clamp when it’s closed.
9. Place film loosely between door and pre-stretch rollers, then close the door and ensure that the
carriage locks are correctly locked (this is a 2-position lock; make sure to reach the 2
when closing the door).
10. Pull out the film manually in order to verify proper loading and operation of the film carriage.
11. Cut off the excess film and place the film on the clamp, then close the clamp with the clamp jog
push button (located on the wipe plate near the e-stop).
12. Close the door, press reset to rearm the door circuit then acknowledge the alarm and restart the
machine.
13. If film breaks during a wrap cycle, repeat steps 7 to 12 or attach film to the product.
nd
position
Carriage Lock
Figure 3 Film loading and threading
Wulftec / M.J. Maillis Group
Page 11 of 36
Version 1.1.1 /May 2013
Page 12
Film loading and threading (cont’d)
WARNING! Before threading the film, press on the dancer bar once door is
opened to make sure the pre-stretch rollers are not turning. If they are, contact a
Wulftec Customer Service representative immediately. Do not touch the carriage.
Inadvertent movement of the dancer bar will cause the rollers to turn abruptly,
creating the possibility of serious injury. The operator must respect the film
loading and threading instructions AT ALL TIMES!
NOTE: If the film web breaks during the cycle, reattach the film, or if necessary,
rethread the film following the instructions. It is not necessary to reset the
machine. If E-stop is activated, the pre-stretch and the clamp will not work. If the
E-Stop is pressed, pull it.
The machines equipped with a standard carriage are programmed to stop when a
lack of film occurs. In a wrap cycle during which the rotation speed is higher
than 10Hz and the pre-stretch motor stops working for more than three (3)
seconds, the machine will fall into a stop state. The cause is either a stop a lack
of film or a film break. Follow the film threading procedure (previous pages) to
rethread the film to start/restart a cycle.
The machines are equipped with a proximity
sensor used to determine if the carriage door
is closed properly. This sensor can be seen
through the hole in the carriage cover. When
the light is lit, it indicates that the carriage
door is closed properly. If the door is open,
the pre-stretch motor will stop working or if
the machine is running a wrapping cycle, it
will stop by itself rapidly. If the light is not lit, make sure the
door is properly closed. The machine is ready for a start cycle.
Wulftec / M.J. Maillis Group
Page 12 of 36
Version 1.1.1 /May 2013
Page 13
Wrapper Controls
Controls
Power on/off Turns power OFF/ON to the machine.
Reset Brings the carriage down and moves the rotary arm
Functions
back to home position.
Carriage
Up/Down
Reinforce wrap Reinforce wrap function allows the operator to reinforce
Manual rotation Manual rotation moves the rotary arm to desired
Start/stop Starts or stops the wrap cycle (also continues the wrap
Emergency stop Temporarily stops the sequence by cutting all power to
Note: If inverted controls option has been chosen, you will keep the same controls although the
control cabinet has a different appearance.
Note: An amber safety flashing light is installed on top of the enclosure. The light flashes during
machine operation.
With the machine cycle stopped, allows carriage to be
moved up or down.
any section of the load by pausing the carriage
movement while the rotary arm continues. The
number of turns in reinforce wrap is determined by the
amount of time the switch is activated. This function
allows the operator to set a number of reinforce wraps
in a minimal amount of time.
position.
cycle after the top cover pauses or after stopping "in
cycle" by using the emergency stop) and brings the
carriage down in spiral up mode.
the drives. Wrapping sequence may be re-started after
pressing E-stop. (To re-start the wrap cycle, simply
release the E-stop and press the START/STOP button.)
Wulftec / M.J. Maillis Group
Page 13 of 36
Version 1.1.1 /May 2013
Page 14
Wrapper Controls (Cont’d)
This page is used to change passwords
Wulftec / M.J. Maillis Group
Page 14 of 36
Version 1.1.1 /May 2013
Page 15
Wrapper Controls (Cont’d)
Controls
Carriage speed up Controls speed of carriage in up direction, which has
effect on cycle time and film overlap. It should be
adjusted with great care when trying to optimize speed
while maintaining quality wrap on product. Min. on
potentiometer is lowest speed attained.
Carriage speed down Controls speed of film carriage in the downward
direction, which has an effect on cycle time and film
overlap. It should be adjusted with great care when
trying to optimize speed while maintaining quality wrap
on product. Min. on potentiometer is lowest speed
attained.
Rotation speedAllows the rotation to be set at the speed best suited to
the load, variable from min. (being the lowest speed
attainable without stopping) to 17 RPM.
Film tension Controls the tension between film carriage and pallet
load (i.e. higher % tension = tighter wrap).
Functions
Wulftec / M.J. Maillis Group
Page 15 of 36
Version 1.1.1 /May 2013
Page 16
Wrapper Controls (Cont’d)
Controls
Top wraps Determines the number of wrap layers at the top of the
load, adjustable from 0 to 10.
Bottom wrapsDetermines the number of wrap layers at the bottom of
the load, adjustable from 0 to 10.
Autoheight Timer Used to set the timer for the overwrap.
Functions
Wulftec / M.J. Maillis Group
Page 16 of 36
Version 1.1.1 /May 2013
Page 17
Wrapper Controls (Cont’d)
Controls
Automatic Mode
On/Off
Autoheight off/on Allows "autoheight sensing" for pallet load height
Carriage Speed
Manual
Carriage Raise Timer Used to set the time during which the carriage will
Used to select the machine automatic or semiautomatic mode. In automated mode, the clamp and
cut arm will be activated.
variations. (There are limit switches on the carriage
with adjustable stops on tower as safety override).
Used to set the carriage speed (%) when machine is set
to manual mode.
move up at the beginning to clear the clamp.
Functions
Wulftec / M.J. Maillis Group
Page 17 of 36
Version 1.1.1 /May 2013
Page 18
Wrapper Controls (Cont’d)
Controls
Cycle Counter Counts the amount of wrapping cycles since the
machine was first started.
(Resettable) Cycle
Counter
Reset Press Reset button to reset the resettable cycle counter.
Counts the amount of wrapping cycles since the last
reset. To reset this counter, you will need to enter the
password.
Functions
Wulftec / M.J. Maillis Group
Page 18 of 36
Version 1.1.1 /May 2013
Page 19
Mode of Operation – Standard System
1. Load film and then put power on.
2. On the touch screen, go to the automatic page.
3. Select Wrapping Off if wrapping not required.
4. Depress "Reset".
5. When reset completed, depress "Start". *The button will light up.
6. Machine waits for a load.
Beginning of the Wrap Sequence
NOTE: You can temporarily stop the wrapping sequence at any time. This can be
done by pressing the Start or E-Stop button. (To re-start the wrap cycle, simply
release the E-Stop and press Start). It is to be noted that by resetting the machine,
a new cycle is initiated.
7. Place the load in the center of the wrapping zone.
8. Activate the pull cord or start/stop button to begin rotation.
9. After 1.5 turns, the clamp releases the film.
10. The carriage moves up.
11. The top of the load is sensed.
12. The machine completes the top wraps.
13. The carriage moves down.
14. The carriage stops at bottom limit switch.
15. The machine completes the bottom wraps.
16. The rotation slows to minimum speed.
17. The rotation stops at home position.
18. The film push arm goes out.
19. The clamp closes.
20. The cutter wire rotates into film and cuts it on contact.
21. The film is wiped.
22. The film push & wipe arm goes back to home position.
End of Wrap Sequence
To activate Manual mode, go to the manual page on the touch screen. By doing so, automatic
sequence and reset are immediately interrupted.
Wulftec / M.J. Maillis Group
Page 19 of 36
Version 1.1.1 /May 2013
Page 20
Cut Arm Operation
1. During the last ½ turn, the rotation slows down.
2. When the boom reaches its home position, the cut arm is activated.
3. During its activation, the cut wire heats up and cuts the film web.
4. When the arm reaches the second proximity sensor, the motor is “reversed” and the arm returns
to its home position.
5. It stops when it reaches the back proximity sensor.
6. Machine is now ready for another cycle.
Wrapping the Load
1. Turn the power switch to "On" (the power on light should be illuminated).
2. Place a load under the arm.
3. Pull the end of the film from the carriage and stick it on the pallet or on the load.
4. Be sure that all pallet jacks, forklifts and personnel are clear of the wrapping area.
5. Select the required wrapper controls.
6. Depress the "Start" button to initiate the wrap cycle.
7. When the wrap cycle has been completed, press the cut film web onto the load or tuck it at the
end under the lower film wrap, if required.
8. The load may now be removed and the machine is ready for the next cycle.
The operator can select or tune a number of variable wrapping parameters in order to achieve the
desired wrap configuration. These controls also affect the cycle time.
Film Carriage / Rotation Speed
The film carriage speed control varies the rate at which the carriage travels up and down. This, in
conjunction with the rotation speed, determines the amount of film overlap. The slower the carriage
speed, given the fact that the rotation speed remains unchanged, the greater the overlap. The
rotation speed should be set to optimum speed for a given load stability to achieve optimum cycle
times.
Upper/Lower Limit Settings
The upper limit stop bracket sets the upper limit of the wrap. If this bracket is set lower than the top
of the load, it will override the photoeye (standard on most machines). The lower limit stop bracket
located on the arm sets the lower limit of the wrap.
Top Wraps
The number of top wraps applied to the top of the load has to be set on the touch screen. It can be
set to apply zero (0) to nine (9) wraps to the top of the load.
Bottom Wraps
The number of bottom wraps applied to the bottom of the load has to be set on the touch screen. It
can be set to apply zero (0) to nine (9) wraps to the bottom of the load.
Overwrap
The film overwrap is the extent to which the film carriage wraps above the load. Under stretch, the
film tends to fold itself over the top, providing a greater degree of retention. The overwrap can be set
by adjusting the timer on the touch screen. The upper limit stop may also be used to set the
overwrap (if this limit switch is activated before the photoeye, it will override it). Note that the
carriage speed up setting is going to change the overwrap adjustments.
Film Tension (Post Stretch)
The film tension control on the control panel inside the enclosure adjusts the tension (or pull)
between the film carriage and the load. The higher the tension control is set, the tighter the load is
wrapped.
NOTE: For proper performance of the film carriage, the dancer bar should float
between its limits. Avoid setting the tension so high that the dancer roller becomes
pinned against the secondary roller. If additional tension is desired, simply turn the
adjustment knob to apply more pressure upon the dancer bar.
Wulftec / M.J. Maillis Group
Page 22 of 36
Version 1.1.1 /May 2013
Page 23
Setting Wrap Parameters (Cont’d)
Photoeye Settings
Figure 4 Retroflective Photoeye
t
l
u
a
p
n
t
g
u
i
O
S
LightDark
Operate
r
e
w
o
P
LED Indicators
Each sensor features three LED indicators to help you program and use the sensor.
Green
The green LED indicates “power”. When this indicator is lit, power is on.
Amber (Yellow)
The amber or yellow LED indicates “output.” This indicator will light up when an output is present.
In AC versions, this indicator shows that the relay is closed. In DC versions, this indicator shows
that the transistor is switched according to the light/dark switching that has been set.
Red
The red LED indicates “signal strength.” This indicator is solid when the signal is good; it flashes
when the signal is marginal. This indicator is especially helpful for use in alignment or to determine
whether dirt and dust build-up will interfere in operation. A flashing signal strength indicator will
trigger the alarm output.
Light/Dark Switching
Light and dark switching can be toggled using the switch below and between the red signal strength
and green power LEDs. Simply move the switch toward “light” for light switching or “dark” for dark
switching.
Sensitivity Adjustment
Using a small screwdriver, turn the sensitivity adjustment, located to the right of the green power
LED. To increase sensitivity, turn clockwise; to decrease sensitivity, turn counter-clockwise.
However, it is strongly recommended that this switch always be switched to “dark”.
Wulftec / M.J. Maillis Group
Page 23 of 36
Version 1.1.1 /May 2013
Page 24
Photoeye Settings (Cont’d)
DS-60 Photoeye Adjustment
1. Using a forklift, place a load as indicated in the drawing. The load has to be the same as the ones
that are going to be wrapped with that machine.
2. Set the photoeye’s dial to the “ALIGN” position. When pressing down on the “TEACH” button you
will see a red spot where the DS-60 is aimed at. Be sure you aim it at the center of the load.
1Q
3. Turn the dial at the “
4. Turn the dial at the “
5. Turn the dial at the “RUN” position.
6. You can increase or decrease the amount of overwrap through the HMI.
” position and hold the teach button until the lights stop flashing.
2Q
” position and hold the teach button until the lights stop flashing.
Face of load at
center of rotation
Wulftec / M.J. Maillis Group
Page 24 of 36
Version 1.1.1 /May 2013
Page 25
Photoeye Settings (Cont’d)
Rotary Arm Bumper - Photoeye Function: This photoeye detects if the arm’s path is clear. If an
obstacle is in the way, the machine will create an alarm.
Autoheight Photoeye - Photoeye Function: This photoeye tells the carriage to stop at the right
height for the desired overwrap.
Wulftec / M.J. Maillis Group
Page 25 of 36
Version 1.1.1 /May 2013
Page 26
Setting Wrap Parameters (cont’d)
Photoeye Response Delay Time
Since most pallet loads are square or rectangular, as opposed to round, there must be a delay time
setting in order to remain "ON" as the arm turns around the load and reflects the diffuse photoeye's
signal away from its own receiver. The delay is set in the PLC program and can be changed via the
touch screen.
Automatic Height Sensing
All Wulftec automatic machines are equipped with a photoeye sensor, for load height sensing. This
allows for variations in load height, while maintaining the predetermined "overwrap" setting. All
machines are equipped with manual override (limit switches).
NOTE: When using a 30” carriage with a 20” film on the machine, the
autoheight photoeye will not work on small load higher than 20” and smaller
than 33”.
NOTE: The upper limit stop controls the overwrap of the pallet when the
photoeye mounted on the carriage is not in use.
Setting the Limit Stop
Lower:
Loosen the lower limit stop.
Slide stop block into desired position.
Tighten securely.
Upper:Loosen the upper stop limit.
Slide the stop block into desired position.
Tighten securely.
NOTE: The bottom limit switch block should be adjusted according to the
downward speed of the carriage so that it does not over travel. At each end of the
limit stop adjustment rail are over travel security stops that are fixed in position.
Under no circumstances are these to be removed, as serious machine damage
and/or personal injury may result.
Wulftec / M.J. Maillis Group
Page 26 of 36
Version 1.1.1 /May 2013
Page 27
Setting Wrap Parameters (Cont’d)
Analog Sensor Adjustment
Follow these steps to replace or adjust the analog sensor and cam:
Light on Sensor
Constant = Reading
Flashing = Out of Range
Figure 5 Analog sensor adjustment
1. Activate the Emergency Stop.
2. Remove the film roll.
3. Remove the carriage cover.
4. Make sure that the dancer bar is completely retracted and at home position.
5. Using a ruler, align the right side of the cam with the edge of the analog sensor bracket. Tighten
the bolt to secure the cam in place.
6. Loosen the detector, lean it against cam. Then move back gradually until the light on the
detector stops flashing and becomes constant, and then tighten the detector in position.
7. Rearm the emergency stop circuit (Caution: the pre-stretch motor can restart).
8. For PowerFlex 4 : make sure that parameter A110 is at 20
PowerFlex 40: jump at step 10
9. Make sure that when the dancer bar is completely retracted with its initial position, the motor
does not turn, and when the dancer bar is moved gently, the motor starts gradually. If the motor
turns in initial position (too far from the cam), or it starts too far (too close from the cam), loosen
the nuts and readjust the analog sensor slightly.
10. Reinstall the carriage cover.
11. Install film roll.
Wulftec / M.J. Maillis Group
Page 27 of 36
Version 1.1.1 /May 2013
Page 28
Setting Wrap Parameters (cont’d)
Proximity Sensor
The first sensor is located beside the rotary arm
ring gear and is used to count the rotary arm
revolutions (to match the wrap counts selected
on the panel). The reading is obtained by a flat
piece of steel glued on the ring gear. The second
sensor is used to indicate home position to cut
film and also, because the WRT series uses two
(2) counts per rotary arm revolution, to give the
second count required.
Figure 6 Proximity Sensor
Revolution and Home Position Sensors
Wrappers from Wulftec use proximity sensor to count revolutions and to determine the arm’s home
position. These two (2) sensors can be found on the top of the ring gear and they are reading off a
piece of steel glued on the top of the ring gear.
Reed Switches Adjustment
These switches indicate the push arm’s initial and limit position. Red light at the end of the arm
should be on when it arrives in its initial position or to its limit. See Item 3 in Figure 7 on page 30.
Wulftec / M.J. Maillis Group
Page 28 of 36
Version 1.1.1 /May 2013
Page 29
Proximity Sensor Replacement
Removal
Remove the ring gear cover and unscrew the quick-disconnect on the proximity sensor. Loosen the
two (2) lock nuts on the sensor and remove it.
Replacement
Position the sensor until the gap between the sensor head and the counter block on rotary arm is
approximately 1/8 of an inch. Tighten the lower locknut finger tight. Tighten the upper locknut and
reconnect proximity sensor. When all wires and guards (if applicable) have been replaced, turn on
the power and jog the rotary arm by using the arm jog switch. Then verify if the related input blinks.
WARNING! Make sure that the power is disconnected and that a pad-lock is
installed on the main switch of the wrapper before you carry out these operations.
Motor Speed Control
Your Wulftec pallet wrap machine utilizes AC drives, which are controlled by a digital parameter
unit. This unit is used to set the functions such as acceleration/deceleration time and electronic
thermal relay to allow variations in motor operation to best suit the specific application and/or
desired customer wrap parameters.
Wulftec / M.J. Maillis Group
Page 29 of 36
Version 1.1.1 /May 2013
Page 30
Maintenance
General Maintenance
The commutator should be cleaned every two years or every 6000 hours of operation.
Cut/wipe pivot points should be greased (approx. every 6000 hours of operation).
Figure 7 Film in clamp
Carriage Rails
These rails should be greased with all-purpose grease every 2000 hours of operation.See Item 5 in
Figure 7 au-dessus.
Ring Gear
Bearing: Lubrication of the bearing component is provided through the auto-lube system. Operation
of the auto-lube is detailed in the annex. Inspect the grease container of the auto-lube once a month
and refill with EP2 grease as required.
For machines without the auto-lube system, apply EP2 grease with a grease pump every month, or
as part of your regular maintenance program. Move bearing several times to ensure complete fill.
Inspect the seals to ensure they are properly inserted into their grooves and that they are intact and
preventing contaminants from entering the bearing.
Teeth: Visually inspect the teeth once a month. Remove buildup if present. With steel pinion, if
teeth are dry, apply grease with a brush all around ring gear. Use high quality open gear grease
(Mobile Unirex EP2 GCLB or equivalent). With nylon pinion, no greasing is necessary. Backlash
between gear and pinion needs to be kept at approximately .005".
*For cold package; apply EP0 grease
Wulftec / M.J. Maillis Group
Page 30 of 36
Version 1.1.1 /May 2013
Page 31
Maintenance (cont’d)
Chain Maintenance
All chains should be greased every year at the same time as the oil is changed in the reducer. The
chain tension should be checked on a regular basis. The proper tension for the chain is approx.
0.015" of slack for every one (1) foot of chain.
Carriage Lift Chain Tension Adjustments
Position the carriage to the center of the travel limits. Hold
the locknut while tightening the tension-adjusting nut on
the "upper" section. (The lower section is for aligning the vgroove/carriage mounting plates). Do not over tighten and
assure that both chains are equal in tension. (0.015" of
play per foot) Once set, hold the adjustment nut and
tighten the locknut.
Pre-Stretch Belts Adjustment
The pre-stretch belts should be checked for proper tension every 2000 hours of operation.
Recommended tension is 1/64” deflection per inch of belt span with a force of approximately 25 lbs.
The motor drive belt is adjusted by loosening the four (4) motor mounting bolts and sliding the motor
in the mounting slots. The pre-stretch belt tension is adjusted with the tension adjustment arm. This
arm can be rotated and moved within the mounting slot to obtain correct tension.
Pre-Stretch Chain Adjustment
The pre-stretch chains should be checked to ensure the proper tension (approx. every 2000 hours of
operation). If the chains are found to have improper tension they may be adjusted. (0.015” of play
per foot of chain is recommended) The motor chain may be adjusted by loosening the four (4) bolts
from under the top plate of the carriage and moving the motor using the slots provided. The prestretch chain tension may be adjusted by using the cam & sprocket. This cam has an eccentric hole
and may be turned for chain adjustment.
Wulftec / M.J. Maillis Group
Page 31 of 36
Version 1.1.1 /May 2013
Page 32
Maintenance (cont’d)
Filter Regulator
The FR possesses a Filter, which traps the water contained in the air line. A drain plug is located at
the bottom of the filter section. (This function should be done automatically and should not have to be touched). The second section of the FR contains a Regulator that shows how much air
pressure going is into the machine. The pressure may be regulated by the knob located at the top of
the center section of the FR. This pressure should be set at 80 psi for all Wulftec automatic
machines.
Photoeyes
Every 2000 hours of operation the photoeye and reflectors should be cleaned to ensure that no false
readings would be taken during operation of machinery.
Reducer
The reducers on your equipment are filled with Mobil Glygoyle 460 oil. Do not mix different
lubricants in the reducer. Lubricant incompatibility may result in premature failure. Do not use
Mobil Glygoyle 460 oil if your operating environment requires a different type of oil (ex. cold
temperature environment) or if you have requested a different type of oil in your system.
During the initial start-up operation, a break-in period is necessary before the reducer reaches
maximum operating efficiency. It is recommended to take an oil sample after 1,000 hours of
operation to see if metal shavings or fragments may have accumulated during break-in. If so, change
the oil. Winsmith recommends a gradual application of load during the first several hours after startup. The reducer may run hot during this initial break-in period. This is normal. A few drops of oil
may weep from the lip seals during the break-in stage. After a short period of operation, clean off any
excess oil around the shaft seals and recheck the oil level; adjust if necessary.
Subsequent oil changes should be made after 25,000 hours or as a part of a regular maintenance
program (this frequency is highly application dependent). Note: When changing oil, carefully inspect
used oil to be sure there are no metal shavings, fragments and other signs of excessive wear. Under
severe conditions (rapid temperature changes, moist, dirty, or corrosive environments) it may be
necessary to change the oil at intervals of 1-3 months. Periodic examination of oil samples taken
from the reducer will help establish the appropriate interval.
The oil change procedure for all SE Encore speed reducers is similar. The appropriate oil fill, drain,
and level plugs are identified in chart on following page. Please note that these locations are unique
for each operating position shown. After draining the old lubricant, new lubricant should be added to
the appropriate level plug shown.
Wulftec / M.J. Maillis Group
Page 32 of 36
Version 1.1.1 /May 2013
Page 33
Reducer Chart
Legend: F = Refill Plug V = Vent Plug L = Level Plug D = Drain Plug
Wulftec / M.J. Maillis Group
Page 33 of 36
Version 1.1.1 /May 2013
Page 34
Troubleshooting – WRTA 150
Problems Causes Solutions
Arm not
turning
The reset
sequence does
not stop
•The safety fence door may not be closed.
•Push arm may not be completely
retracted.
•One of the photoeyes may be blocked or
dirty.
•Arm speed on the control panel is set to
zero (0) or too low for the arm to turn.
•Motor fuses may be burned.
•Pinion holding key or motor shaft key is
broken.
• Arm is not at home position and is not
turning.
• Arm is turning but does not stop at
home position.
• Push arm may not be completely
retracted.
• Close and latch the door.
• Refer to Push Arm problems and the
section on Reed Switches adjustment on
page 28.
• Clear the photoeye and/or clean it.
• Increase the arm speed setting located
on the control panel.
• Check for short, if none change the fuse
using the adequate rating.
• Check rotation mechanism, if in proper
order, change the key.
• See Arm not turning problem.
• Check if min speed is set too high.
• See Push arm not moving problem.
Breaker
problem
Load does not
stop centered
Carriage. Does
not stop at the
top of the load
Push arm is
not moving
Carriage
Does Not Go
Up
•Overload - short of wire - defective drive • Check for short. If none found, turn
breaker on for one time. If the breaker
jumps again, call your distributor.
•The system may be set in the pass
through mode.
•The center photoeye may not see the
load
•The infeed safety may not see the load
•The autoheight may be off.
•The photoeye may reflect on something
in the background.
•The flow control may need to be
adjusted. See Item 6 in Figure 7.
•The cylinder may be defective. See Item
7 in Figure 7.
•The valve may be defective.
•The top limit switch on the carriage may
be activated.
•The carriage speed up may be set to
zero (0) or too low for the carriage to
move.
•Motor fuse may be burned.
• Select “Wrapping On” on the touch
screen.
• Clear the photoeye and/or clean it.
• Clear the photoeye and/or clean it.
• Activate the autoheight.
• See Automatic Height Sensing
paragraph.
• Look for kink in the hose. If none,
adjust the valve flow controls.
• Change the defective cylinder.
• Change the defective valve.
• Readjust the limit switch and/or change
the defective switch.
• Increase carriage speed up (located on
the control panel).
• Check for short. If none found, change
the fuse using the appropriate rating.
Carriage stays
at the top
while the arm
continues to
turn
Wulftec / M.J. Maillis Group
•Carriage speed down may be set to zero
(0).
•Bottom limit switch on the carriage may
be activated.
•The carriage could be stuck on the dead
stops.
Page 34 of 36
Version 1.1.1 /May 2013
• Increase carriage speed down (located
on the control panel).
• Readjust the limit switch or change the
defective switch.
• Pull vigorously on the 2 chains at the
same time someone else presses the
Carriage Up button on the touch screen.
Page 35
Problems Causes Solutions
Clamp does
not open after
1-1/2 turns
•Air cylinder does not retract.
•Carriage bottom limit stop may be too
low and the film is wrapping too low
onto the clamp preventing it from
• Look for kink in the hose. If none,
adjust the valve flow controls
• Move the stop block higher for the film
to wrap approx. 5 inches over the clamp
jaws.
opening.
Heat wire does
not cut the
film
Heat wire does
not go back
home
Machine stops
in the middle
of a cycle
•The push arm may not have engaged
completely.
•The fuse may be burned.
•The cut wire may have broken. See Item
2 in Figure 7.
•The flow controls on the cylinders may
need adjusting. See Item 6 in Figure 7.
•There may be a lack of air pressure to
the system.
•The cylinder may be defective. See Item
• Look for the reed switch to make sure
the PLC receives the signal when the
arm is out.
• Check for short, if none, change the
fuse using the appropriate rating
• Change the cut wire with .032 gage
nychrome wire.
• Look for kink in the hose. If none are
found adjust the flow control on the
cylinder.
• Look for the air pressure gage it should
not be below 80PSI
• Change the defective cylinder.
7 in Figure 7.
•The flow controls on the cylinders may
need adjusting.
•There may be a lack of air pressure to
the system
•The cylinder may be defective.
• Look for kink in the hose. If none,
adjust the valve flow control.
• Look for the air pressure gage should
not be below 80 PSI.
• Change the defective cylinder.
•An alarm is activated. • Look for the alarm on the touch
screen, take the corrective measure;
then accept the alarm and restart the
cycle.
Motor on film
tension never
stops turning
Motor on film
tension never
turns
•The steel cam is not touching the analog
sensor when the dancer bar is at rest
position.
•The minimum speed trim pot on the
pre-stretch drive is not set to minimum.
•The tension adjustment spring on the
side of the carriage is set too light.
•The clamp is open.
•The motor fuse is burned.
•The motor fuse is off.
•The fuse on the analog board is burned.
•Analog sensor may be defective.
•Turn the steel cam closer to the analog
sensor or move the analog sensor
toward the cam. The analog sensor and
the cam are situated under the red
cover on the film carriage.
• Turn the minimum speed trim pot
counter clockwise on the pre-stretch
drive.
• Increase pressure on the spring by
turning the knob clockwise.
• Close the clamp.
• Check for short, if none, change the
fuse using the appropriate rating
• Turn on the motor fuse.
• Check for short, if none, change the
fuse using the appropriate rating
• Call technical service at Wulftec.
Wulftec / M.J. Maillis Group
Page 35 of 36
Version 1.1.1 /May 2013
Page 36
Problems Causes Solutions
Power light is
not on
• Main fuse is OFF.
• Light bulb may be burned out.
• Main switch is in the off position
• Main fuses are burned.
• Related glass fuse is burned.
• Turn on the main fuse.
• Change the light bulb.
• Turn the switch to the on position.
• Check for short, if none change the
main fuse using the right rating.
• Check for short, if none change the fuse
using the right rating.
Start (blue)
light does not
come on after
pushing on
start.
• Light bulb may be burned out.
• An alarm might be activated.
• One of the automatic modes was not
engaged. (Wrapping or passthrough.)
• Change the light bulb.
• Accept the alarm.
• Make sure that the machine is in
automatic mode and that a reset was
done.
If you cannot find a solution to your problem with this guide, please contact your distributor.
PE VFD-03:GNDCBL-07:GRN MTR-03:GMTR-03 ROTATION MTR(210E7)
16
15
14
13
12
11
10
9
PE
8
7
6
5
4
3
2
1
17
18
19
20
21
22
23
24
QP-01TO SLIP RING
E
D
C
B
A
12345678910
Page 88
Revision
0PRODUCTION
Date
11/01/2006
Name
A.B.
Verified By: GUY LOPES
6EPAN03622
WULFTEC M.J. MAILLIS
WULFTEC MJ MAILLIS
209 WULFTEC
QUEBEC, CANADA
Page Title:
Dwg. No.:
QUICK PLUG PIN CHART: QP-02
221
Drawn By: ANDRE BUREAU
Page: 221SMART SERIES WRTA
QUICK PLUG PIN CHART
PLUG:
POLE
TARGETWIRE
FEMALE SIDE
CABLE TARGETWIRE
MALE SIDE
CABLELAST TARGET
FUNCTION TEXTPAGE
1TB-01:3 24V:BLU TB-200:1CBL-16:REDPBL-01 FILM CLAMP OPEN/CLOSE ROTARY ARM AT HOME POSITION(212B2)
2TB-01:9 0V:BLU/WHT TB-200:5CBL-16:BLKPBL-01 FILM CLAMP OPEN/CLOSE ROTARY ARM AT HOME POSITION(212B2)
3TB-02:6 48:BLU TB-200:8CBL-16:WHTPB-04 E-STOP(212A2)
4TD-01:B1 52:BLU TB-200:9CBL-16:GRNPB-04 E-STOP(212A8)
5TB-200:10CBL-16:ORG10(212D8)
6TB-200:11CBL-16:BLU11(212D8)
7PLC-02:Q08.4 110:BLU TB-200:12CBL-16:WHT/BLKPBL-01 FILM CLAMP OPEN/CLOSE ROTARY ARM AT HOME POSITION(212B8)
8PLC-02:I08.2 111:BLU TB-200:13CBL-16:RED/BLKPBL-01 FILM CLAMP OPEN/CLOSE ROTARY ARM AT HOME POSITION(212B8)
9PLC-02:I08.0 112:BLU TB-200:14CBL-16:GRN/BLKRS-01 PUSH ARM EXTENDED(212B8)
1 0ESWT00581800F CAGE CLAMP BASE 3 WITH CONTACT 1NOAB800F-PQ10
PLC-01 1 0EPLC00629S7-1200 CPU 1214C AC/DC/RLYPANELSIEMENS6ES7 214-1BD23-0XB0(205D3)
PLC-02 1 0EPLC00630S7-1200 SM 1223 8 IN 8 OUT DC/RLYPANELSIEMENS6ES7-223-1PH32-0XB0(205D5)
PLC-03 1 0EPLC00632S7-1200 SM 1232 4 ANALOG OUTPUTPANELSIEMENS6ES7-232-4HD32-0XB0(205D8)