Beta AS-35 User manual

OPERATION MANUAL
Common for All models
Weft Sensor (Weft Break Detection)
AS
-
35
A
-
35
MSD10
-
24
(
PNP
/
NPN)
1
OPERATION MANUAL FOR MAGNETIC SENSOR
(WEFT BREAK DETECTION)
For Both Models: 1) AS - 35 and 2) MSD10-24(PNP / NPN)
Introduction: The Weft Sensor is highly sophisticated and reliable device to
sense the weft breakages, and
uneven weft tension in Circular
Loom. It operates on the
principle of magnetism and
hence does not malfunction due
to effect of dust and ambient
light which are invariably present
on any loom. The sensor does
not require any maintenance like
cleaning, adjustment, setting etc.
and will give years of trouble
free service. Periodic checking of
magnet holders is required.
Packing List : After receipt of
material, check for all items as
indicated in ’Packing List’.
Installation: The installation is very easy and can be done by anyone having
fair knowledge of Loom. First fit the magnetic reflector assembly on shuttle
boom pipe. lf original reflector assemblies are already there then you may be
able to use them. Ensure that these assemblies are at equal distance from ring
and nearest to ring. Next, fix the sensor in the clamp provided. Put an
universal joint on bolt of the clamp and mount the universal joint on pipe where
a photo sensor may have used earlier.
Suggested connections of magnetic sensor to avoid gapping
problem after weft Break: In mechanical loom, the Take-up Roller (Haul-off)
rotates through mechanical link from main shaft rotation. When weft tape
breaks, one tape goes missing from fabric and hence the take up must be
stopped immediately after weft break. Because, after STOP signal is
generated, the loom actually takes few rotations before stopping completely.
Beta Computronics pvt. Ltd.
10/1 IT Park, Parsodi, Nagpur-440022 (MS), INDIA.
Phone :[phone]
Website: www.betacomp.com
E
-
mail:
[e-mail]
,
[e-mail]

2
So Clutch is used for this purpose. Normally clutch is engaged and the main
shaft rotation is mechanically linked to take up Roller. When weft tape breaks,
the Relay contacts of Relay PCB should be used to deactivate clutch to stop
take up immediately. The fabric will be crammed to avoid gap in fabric.
Magnetic Sensor Models: For detect the weft break.
Universal Type 12V DC Model AS-35 with Relay PCB:
This combination can fit on all types of Looms.
Please refer to the wiring schematic for connecting 12V DC sensor (AS-35) to
Relay PCB. Now mount the Relay PCB in Loom Control Panel and connect
24V AC to connectors marked as J3 for “24V AC”. Connect the sensor to
Relay PCB marked as J2 for 12V DC Sensor and finally connect the relay
contacts to stop the Loom with cramming. You may Use NO or NC contact
depending on circuit requirement. The relay contacts are marked as NC / COM
/ NO on J1 connector. Relay can also be connected as 24V DC PNP or NPN
type output to the Loom Controller / PLC. For Electronic loom, cramming is
done by Loom Controller / PLC.
Electrical connection for 12V DC Model AS-35:
PLEASE CHECK THE COLOUR CODE.
Connect sensor directly to Relay PCB as follows. Connect Relay contacts to
STOP loom.
Direct 24V DC Model MSD10-24 : This is suitable for
Direct connection of sensor on specific looms : Relay PCB is avoided
when this model is used.
3
24V DC sensor MSD10 - 24 (PNP or NPN) is directly connected to loom
controller or PLC Please refer to wiring schematic. The output gets activated
when Stop Signal is sent by sensor. The loom controller or PLC will STOP the
loom on receiving this signal from the sensor. For Electronic loom, cramming
is done by Loom Controller / PLC.
Electrical connection for 24V DC Model:
PLEASE CHECK THE COLOUR CODE.
MSD10-24 (PNP OR NPN): Provide 24V DC Supply to sensor as follows.
The Signal is directly connected to Loom Controller / PLC which will then
STOP the loom.
Note: Connect Supply wires and output in correct Polarity. Otherwise
sensor will not work. Consider change in color code.
Use Cable ties or thread to fix the cable on support rod. Do not leave the cable
loosely hanging on loom. Cable should not get stretched. Avoid sharp bending
of cable coming out of sensor. Provide sufficient bending curve. Please dress
up the cable properly to avoid any damage to cable.
Alignment / setting of Sensor and Reflectors:Rotate the loom and
bring one magnetic reflector assembly under the sensor. Rotate the reflector
assembly and bring the magnet to the position where it will be after weft
breakage (about 180 degree rotation). The LED on sensor should light up. Set
the vertical distance between center of sensor bottom point and magnet to
about 35 mm and at an horizontal offset of 10mm away from magnet. This is
important; otherwise magnetic field from the normal position may trigger the
sensor and a malfunction i.e. false tripping would occur.
Sensor
Model
Sensor connections as per
the colour code Drawing
12V DC
Sensor
AS - 35
Connection - 0VDC Signal +12V DC
Refer to
Connection
Diagram of
AS - 35
Wire
Colour code
Blue
BU
Black
BK
Brown
BN
Sensor
Model
Sensor connections as per
the colour code Drawing
24V DC
Sensor
MSD10-24
PNP OR
NPN
Connection - 0V DC Signal +24V DC Refer to
Connection
Diagram of
MSD10-24
(PNP/ NPN)
Wire
Colour code
Blue
BU
Black
BK
Brown
BN

4
Now bring all magnets one by one under the sensor and check for Magnet
reflector alignment as explained above. The LED on sensor should light up.
Adjust the height of sensor or level of reflector assembly as required till LED
on the sensor lights up for all the reflector assemblies uniformly.
(Red LED for 12V DC & White LED for 24V DC)
Now remove one tape from the reflector assembly and run the Loom at
normal speed. The LED on top of sensor should light up continuously. If it
does not light, check the alignment and then refer to trouble shooting Section.
Now your sensor is ready and can be put to normal operation. Run the
loom at normal speed and when the weft tape breaks or if there is uneven
tension in shuttle bobbin tape, the loom will stop instantly (poor winding on
bobbin or shuttle brake is loose or if the bobbin is empty). The sensor does not
require any maintenance as it is dust proof, but periodic checking will help in
long way. Maintenance and alignment / setting of magnet reflectors are
required to be done periodically.
Precautions: Following precautions will help in getting maximum advantage
from sensor.
a. The sensor will trigger even if the weft tension is low. Ensure that a proper
spring is put in shuttle brake. The weft tension is reduced when the bobbin
diameter is reduced. If sensor triggers at small diameter, then reverse the
bobbin direction to get more tension in weft.
b. The magnet reflector assembly must be tight on boom pipe. The location of
all the assemblies should be same for all the shuttles. Further, these should be
in perfect horizontal position. The gap between sensor tip and magnet should
be around 35 mm and horizontal offset of 10 mm from magnet is desirable to
avoid false tripping.
c. For 12V DC Sensor: Do not connect output of sensor to any other PCB.
This may damage electronics inside the sensor. Our sensor is designed for our
relay board only. In case you wish to use any other card, please take prior
permission from our service department.
5
d. For 24V DC Sensor: The Sensor output is PNP type or NPN type. While
ordering, you have to order as per your requirement. This PNP or NPN output
is designed for connecting to loom controller or PLC as digital input only.
e. We have supplied two / three red colour and two / three blue colour magnet
holders with this set. Please mount these alternately on the loom to avoid
Magnetization of sensors in long run.
f. It is highly recommended that yarn path from shuttle bobbin to magnetic
holder and ceramic eyelet on boom pipe should be as straight as possible by
selecting the proper boom pipe size. This will reduce the wear and tear on
boom reflector assembly and give a longer life to it.
LED Indicators:
SELF TEST: A feature is added to check tripping circuit of Weft Break sensor
and LEDs. On every power ON to Weft Break sensor, the LED will flash. This
flashing on power ON indicates that sensor is working and while the LED is on
sensor is ON for a short time, in effect the input on loom controller / PLC will
be also ON at that moment OR the Relay on Relay PCB will be also ON at that
moment. This is the 'self test' by Weft Break sensor where it checks the LED
on sensor, and the output connection of sensor up to Relay PCB OR the loom
controller / PLC is ok.
For 12V DC Sensor Model AS - 35:
The Sensor has one LED and its function is as under:
a. Red LED - Magnetic field sensed by sensor (Tape break condition)
b. The Relay PCB has two LEDs and their functions are as under:
i. Red LED - Relay ON. (Relay gets ON when tape breaks.)
ii. Green LED - Power ON (Always ON when Power supply is ON)
For 24V DC Sensor:
The Sensor has one LED and its function is as under:
White LED - Magnetic field sensed by sensor (Tape break condition)

6
Trouble shooting: (Fault finding)
Your sensor has been thoroughly tested at our works, however in case it does
not work properly, follow the trouble shooting guide lines as under :
A. LED on sensor does not light up even if Weft tape is broken :
Check for vertical distance (around 35mm) between magnet holder and
sensor.
Check for horizontal offset (10 mm approx.) between magnet holder’s 180°
rotated position and sensor.
Check supply connections to sensor.
B. Loom stops even if weft tape is not broken. LED on sensor lights up.
Shuttle bobbin tension is loose.
Brake spring is weak.
Increase horizontal offset between magnet and sensor. This is to avoid
false tripping.
Increase vertical distance between magnet and sensor (around 35mm).
C. Loom stops when bobbin diameter is reduced :
Low tension in brake spring.
Change brake spring.
Rotate the axis of shuttle bobbin to increase weft tension
(Reverse the shuttle direction).
For 12V DC Sensor.
a. Red LED on relay PCB does not light up :
Check for 22 - 26V AC Input on PCB.
Check for 14 - 17V AC on transformer secondary.
Check for 17 - 22V DC on electrolytic capacitor.
Check for 12V DC on PCB connector J2.
7
b. Red LED on sensor light up but loom does not stop :
Check for connection on Relay PCB (marked as signal)
Check if Relay operates when weft is broken.
Check Relay connection in panel wiring for stopping the loom.
Check Relay contacts on Relay PCB.
For 24V DC Sensor.
White LED on sensor lights up but Loom does not stop:
Check for connection on Loom controller or PLC side.
Check cable connection from sensor to loom controller or PLC. Specifically
check voltage on Signal output wire, when white LED on sensor lights up.
(For PNP: around 22V DC and for NPN: around 0VDC).
Check if loom controller or PLC input is working ok.
This should hopefully help you to correct the problem. But in case further help
is required. Please feel free to contact us.
Note:
1) It is recommended to fix N and S type reflectors alternately in each
boom pipe.
2) While ordering, please mention the model number or type as per your
actual requirement. Sensor comes with other accessories like sensor
clamp etc. Check which items you want along with sensor.
Watch Magnetic Sensor Videos on: www.youtube.com/user/wovensack
For more details please contact us on
[e-mail] or call on 0712-2227125, 2240122
For emergency services please call on
Mobile: + 91 9763711367
Document NO. WB -8
Updated on: 05/04/2017

Technical Specifications of Weft Sensor Models
And other accessories:
SENSOR AS - 35 MSD10-24 PNP/NPN
Outer Diameter 19mm 19mm
Length 85mm 85mm
Weight 210gm 180gm
Operating Voltage 12V DC 24V DC
Output type PNP PNP/NPN as required.
Current 9.5mA 5.2mA
Cable length 2 meter with connector
Type of Sensing Magnetism
Magnet Orientation Alternately North & South
Sensing Distance More than 33mm
Magnet Holder Suitable Magnet Reflector Assembly
Maximum PPM 1200 PPM
Minimum PPM 300 PPM
Loom Type Supported 4, 6, 8, 10 & 12 Shuttle
Operating Temperature 50°C Maximum
RELAY PCB AS - 35 MSD10-24 PNP/NPN
PCB 12V DC Model NOT REQUIRED
Input Voltage (SMPS) 24V AC / DC -------------------
Input Voltage (X’mer) 24V AC, 50Hz -------------------
Input Current (SMPS) 65mA -------------------
Input Current (X’mer ) 235mA -------------------
RELAY PCB SINGLE
SMPS TYPE
AS
-
35
R
ELAY PCB SINGLE
TRANSFORMER TYPE
L’ CLAMP SET(3
PIECE)
CLAMP FOR
WEFT SENSOR
TYPES OF REFLECTOR
MSD10
-
24(PNP
OR
NPN)
FOR MORE INFORM
ATION PLEASE CONTACT
Beta Computronics pvt. Ltd.
10/1 IT Park, Parsodi, Nagpur-440022 (MS), INDIA.
Phone :[phone]
Website: www.betacomp.com
E
-
mail:
[e-mail]
[e-mail]