IRO AB
Box 54
S-523 22 Ulricehamn
Sweden
Tel (Int+46) 321 297 00
Fax (Int+46) 321 298 00
www.iroab.com
info@iro.se
Ref. No 31-8930-0201-03/0103
IWF 2231-B
IWF 2231-plus
Operating Instructions
GB
English
IWF 2231 1
Contents....................................................................................................................................... 1
Main parts ................................................................................................................................... 2
System orientation ...................................................................................................................... 3
Settings ....................................................................................................................................... 4
Balloon control ............................................................................................................................ 6
Threading ..................................................................................................................................... 7
Fault finding.................................................................................................................................. 8
Contents
WORK IS CARRIED OUT ON THE FEEDER, THE TRANSFORMER OR ANY OTHER
ELECTRICAL COMPONENTS. THE FEEDER AND THE TRANSFORMER CABINET
MUST BE FULLY ASSEMBLED BEFORE THE POWER SUPPLY IS CONNECTED.
THE FEEDER AND TRANSFORMER CONTAIN ELECTRICAL COMPONENTS THAT
TO COMPLY WITH C. E. REGULATIONS ONLY REPLACEMENT PARTS APPROVED
Ref. No 31-8930-0201-03/0103
WARNING
CAUTION MUST BE TAKEN IN THE CLOSE VICINITY OF THE FEEDER AS IT
CONTAINS MOVING PARTS THAT CAN CAUSE INJURIES AND, IN NORMAL
OPERATION, STARTS WITHOUT PRIOR WARNING.
THE POWER SUPPLY MUST BE SWITCHED OFF AT THE MAINS BEFORE ANY
RETAIN AN ELECTRIC CURRENT UP TO THREE MINUTES AFTER
DISCONNECTION
ALL WORK ON ELECTRICAL COMPONENTS MUST BE CARRIED OUT BY A
QUALIFIED ELECTRICIAN.
BY IRO AB MAY BE USED.
IWF 2231 2
Electrical control unit
Main Parts
Stopper unit
Wind-on sensor
Pneumatic threading (PTU)
Light emitting diode (LED)
Magnet finger
Spool body finger
Winding disc
On/Off switch
Yarn store sensor
Yarn release button
Winding sensor
Ref. No 31-8930-0201-03/0103
Yarn store adjustment
IWF 2231 3
System Orientation
SYSTEM
The system consists of feeders, cables to each feeder, PTU (pneumatic threading up), and input yarn
tensioners.
FEEDER
The feeder consists of;
• Motor and control circuit.
• Spool body with 7 independently adjustable fingers.
• Pick length control stopper magnet.
• Yarn store sensor.
• Wind-on sensor.
• Winding sensor.
Spool body circumference, yarn store size and stopper unit are mechanically adjusted on the feeder. All
other settings are carried out on the weaving machine keyboard and are transmitted to the feeder
through the serial communication. The yarn release is controlled by the weaving machine.
The motor speed control is a microprocessor based frequency controller situated in the cover above the
motor.
At feeder start-up, the number of windings on the spool body is controlled by the yarn store sensor
which indicates the outer limit of the yarn store. The number of windings supplied to the yarn store is
continuously counted by the wind on sensor whilst at the same time the number of windings removed
from the yarn store is counted by the winding sensor. This information is used by the microprocessor to
calculate the motor speed. This procedure ensures a small constant yarn store.
The length of the pick is equal to the spool body circumference multiplied by the number of windings
removed during one insertion. The magnet pin is opened by a trigger signal from the weaving machine
and closes directly after the second to last winding passes the winding sensor.
Ref. No 31-8930-0201-03/0103
IWF 2231 4
MIN
374
748
1122
1496
1870
2244
2618
2992
No. of
Winds
1
2
3
4
5
6
7
8
MAX
508
1016
1524
2032
2540
3048
3556
4064
Pick length range (mm)
Settings
SPOOL BODY CIRCUMFERENCE
The required pick length is the deciding factor when calculating the spool body circumference and the
number of windings for each pick. The table below indicates the pick length ranges that can be obtained
from different numbers of windings. To calculate the appropriate spool body circumference / number of
windings per pick, proceed as follows:
1. Determine the required pick length (drawing-in width plus waste).
2. Check the table below and determine a pick length range that covers the required pick
length.
3. The number of windings necessary to obtain the required pick length will be found in the right
hand column. If there are two possible values, always choose the lower value.Adjust the spool
body to the required circumference as follows:
1. Move the stopper unit to its uppermost position.
2. Loosen the spool body finger retaining screws.
3. Adjust the fingers using the scale on the oscillating disc as a reference.
4. Tighten the finger retaining screws and reposition the stopper unit.
5. Make a weft insertion test and, if necessary, adjust.
Stopper unit positioning screws
Scale
Ref. No 31-8930-0201-03/0103
Finger
retaining
screw
Stopper unit clearance
0,5-0,7 mm
IWF 2231 5
Settings
2. YARN STORE
2.1 The number of windings in the yarn store is regulated by the position of the yarn store
sensor.
2.2 The number of windings needed depends on the weaving machine's speed, the pick
length and the pattern. Irregular patterns require larger yarn stores. Increasing yarn
store variation will also require an increased yarn store.
2.3 For optimal performance the yarn store should contain as few windings as possible. It is
however important that the yarn store does not run out during high demand peaks.
When adjusting always start with a large yarn store and reduce it successively with the
yarn store sensor until there are as few windings as possible left during high yarn demand
peaks.
WARNING!! It is important that there is sufficient clearance between the yarn
store sensor and the oscillating disc. When weaving with very small yarn stores
ensure that the oscillating disc does not touch the sensor after adjustment.
Ref. No 31-8930-0201-03/0103
IWF 2231 6
To ensure optimal yarn performance between the feeder and the weaving machine it may be beneficial,
especially when weaving heavier yarns, to use a cone for balloon control.
During the initial installation the cone should be adjusted to the outermost position, then, with the
machine running, slide the cone inwards towards the feeder until the optimum yarn path is obtained.
The cone should then be locked into position.
Balloon Control
Ref. No 31-8930-0201-03/0103
IWF 2231 7
Before threading the feeder it is necessary to remove any yarn that may be on the spool body. To do this
the magnet pin must be opened. This can be performed using any of the following methods:
1. A short push on the yarn release button will release one winding.
2. By pushing the yarn release button and keeping it pushed in the magnet pin will remain open as
long as the button is pushed in.
3. Push the yarn release button and – while still pushing – switch the motor off. The magnet pin will
now remain in the open position until the motor switch is turned on.
After the magnet pin has been opened any yarn on the spool body can be removed.
If the magnet pin has been opened as per method three above it must be closed again before the feeder
can be threaded up. To do this, switch on the motor switch.
Threading
To thread the unit proceed as follows:
1. Switch off the motor switch.
2. Hold the end of the yarn close to the input eyelet at the rear of the feeder.
3. Push the PTU activating button and release the yarn.
4. Take hold of the yarn end.
5. Switch on the feeder.
Pneumatic
threading
(PTU) button
Ref. No 31-8930-0201-03/0103
IWF 2231 8
Fault Check in the following order
The unit will not start 1 3 2 4 5 15
The unit will not stop 3 7 6 5 22
The yarn store runs out (without input sensor) 1 8 23 21 2 9 3 5
The yarn store runs out (with input sensor) 1 8 23 21 2 3 5 10
The magnet pin does not respond to the yarn release switch 1 11 5
Incorrect pick lengths 1 7 12 13 20 11 5
Stop reasons on loom display Check in the following order
Basic settings not received 4 14 5 15
Communication error 4 16 5 15
Yarn store not full 18
Overheated prewinder 2 19 5 15
Incorrect motor voltage 19 17 15 5
Incorrect magnet voltage 5 17 19 15
Fault finding
WARNING
ALWAYS TURN OFF THE MAIN SWITCH BEFORE DISCONNECTING OR CONNECTING
HE FEEDER OR ANY OF THE CIRCUIT BOARDS. ALL WORK ON ELECTRICAL COMPONENTS
SHALL BE CARRIED OUT BY A QUALIFIED ELECTRICIAN.
1. Check weaving machine display
2. Check that the winding disc runs free
3. Check yarn store sensor level
4. Check cable connections
5. Replace motor circuit board
6. Replace yarn store sensor
7. Check distance between magnet support and magnet finger
8. Check max speed setting
9. Strong yarn trapped at input side
10. Check that the weaving machine stops when the yarn breaks
11. Replace the stopper magnet
12. Check pick length setting
13. Check winding windows setting
14. Carry out a communication test
15. Replace interface/supply circuit board
16. Check mains supply
17. Check fuses on the interface/supply circuit board
18. Fill up the yarn store before starting the weaving machine
19. Check voltage level
20. Replace winding sensor
21. Check yarn store variation
22. Replace wind-on sensor
23. Check whether yarn store is sufficient
Ref. No 31-8930-0201-03/0103
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