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10. cAuSES AND corrEctIVE MEASurES AGAINSt trouBLES WItH
tHE BoBBIN tHrEAD rEMAINING AMouNt DEtEctING DEVIcE
1) The bobbn thread
remanng amount
detecting function
fails to work even
when the bobbn
thread has run
out.
1
The bobbn thread remanng
amount adjusting counter has been
mproperly set.
2
The start position of bobbin wining
is defective.
3
The sensor amplifier fails to turn
ON/OFF because of the stained
lens.
4
Sensor unt nstallng poston.
5
The bobbn used s not the
exclusive one for the bobbin
thread remanng amount detectng
devce.
6
The bobbn case used s not
the exclusive one for the bobbin
thread remanng amount detectng
devce.
7
The bobbin winder fails to wind the
bobbin uniformly.
8
The sensor cable connecton
failure.
○
Check the specified 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.
tHrEAD AMouNt ADJuStMENt
couNtEr” p.38
○
Start winding a bobbin from the recess
desgnated.
○
Check whether the solenoid valve for the
bobbn thread remanng amount detectng
devce operates normally.
○
wipe clean the lens surface of the optical
fiber unit.
○
Check that the spot of sensor light irradiates
the position of reflecting tape of bobbin.
○
Use the exclusive bobbin for the bobbin
thread remanng amount detectng devce.
○
Use the exclusive bobbin case for the bobbin
thread remanng amount detectng devce.
○
Properly adjust the bobbin winder.
○
Check how the sensor scale and MAIN circuit
board are connected.
Phenomenon
Cause
Corrective measure