ELTEX UPG-Stitch User manual

Instruction for ELTEX UPG-Stitch
thread break detector for sewing machines
16760
General
The UPG-Stitch is a thread break detector designed to be used on sewing machines.
It checks that the thread is moving in stitches. Both no thread movement and continuous thread movement will
result in an active output.
It operates on the piezoelectric principle, detecting the thread movement.
The ceramic sensor part can be used both as a closed eyelet and an open bar.
The thread must always contact the ceramic bar or eyelet, and the thread motion is detected most effectively when
it deviates about 10-15° as it passes through the sensor.
The LED is on when the thread is moving correctly.
It is flashing steady when the thread is not moving.
It is flashing irregularly when the thread is moving continuously.
Fitting
The UPG-Stitch thread break detector is fitted on the
machine with two screws, maximum diameter 3 mm.
NOTE! Electrical interference caused by insufficient
machine ground can cause the UPG-Stitch to
indicate thread movement when no thread is moving.
This can be corrected by electrically insulating the
UPG-Stitch from the machine frame. Two nylon
screws and an insulation pad can be used to achieve
this. These parts are included with the UPG-Stitch
sensor. These parts can also be ordered from Eltex.
The part numbers are:
#4144 Nylon Screw,
#6868 Insulation pad
Adjustment
If the factory setting of the sensitivity is not suitable, it
can be adjusted with the potentiometer, located
under the lid.
When making adjustments, use a small screw-driver,
maximum size of 2.5 mm.
Minimum setting ( counter clockwise) is for
course, fast moving and/or high-tension thread.
Maximum setting ( clockwise) is for fine, slow
moving, and low-tension thread.

The detector has a cable with a 6/4 modular plug
connector
The output is suitable for PLC or other electronic
control devices. The detectors can be connected in
parallel.
The detector is protected against reversed polarity on
the power supply
Yellow Output A
Green Output B
Red
Power supply (+)
15-33 V DC
Black
Power supply (-)
Output: Optocoupler, NC = normally closed
Output load: max 10mA, 35 V DC
Max ON-STATE voltage drop: 2V DC at 10 mA
PNP
Configured as PNP output for PLC; high when thread
is not moving.
NPN
Configured as NPN open collector output (for input
with pull-up resistor); low when thread is not moving.
Special
Configured as optocoupler output; high when thread
is not moving.
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