JUKI APW-896/IP-420 User Manual

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11. CAUSES AND CORRECTIVE MEASURES AGAINST TROUBLES WITH
THE BOBBIN THREAD REMAINING AMOUNT DETECTING DEVICE
1) The bobbin thread
remaining amount
detecting function
fails to work even
when the bobbin
thread has run
out.
1
The bobbin thread remaining
amount adjusting counter has been
improperly set.
2
The start position of bobbin wining
is defective.
3
The sensor amplier fails to turn
ON/OFF because of the stained
lens.
4
Sensor unit installing position.
5
The bobbin used is not the
exclusive one for the bobbin
thread remaining amount detecting
device.
6
The bobbin case used is not
the exclusive one for the bobbin
thread remaining amount detecting
device.
7
The bobbin winder fails to wind the
bobbin uniformly.
8
The sensor cable connection
failure.
○
Check the specied data on the bobbin
thread remaining adjusting counter “B008”.
If the value of “B008” is excessive, bobbin
thread will run out before bobbin thread
remaining amount detection count-up occurs.
Refer to
“
^
-5. USING THE BOBBIN
THREAD AMOUNT ADJUSTMENT
COUNTER” p.38
.
○
Start winding a bobbin from the recess
designated.
○
Check whether the solenoid valve for the
bobbin thread remaining amount detecting
device operates normally.
○
wipe clean the lens surface of the optical
ber unit.
○
Check that the spot of sensor light irradiates
the position of reecting tape of bobbin.
○
Use the exclusive bobbin for the bobbin
thread remaining amount detecting device.
○
Use the exclusive bobbin case for the bobbin
thread remaining amount detecting device.
○
Properly adjust the bobbin winder.
○
Check how the sensor scale and MAIN circuit
board are connected.
Phenomenon Cause Corrective measure

JUKI APW-896/IP-420 Specifications

General

Brand	JUKI
Model	APW-896/IP-420
Category	Sewing Machine
Language	English