− 41 −
When the bobbin thread remaining amount counter value becomes “0”
at the sewing end, the count-up screen is displayed and the buzzer
sounds. Replace the bobbin thread of the bobbin where the bobbin
thread remains few.
When CLEAR button
A
is pressed, the bobbin thread remaining
amount counter value is reset and the screen returns to the sewing
screen.
(2) Releasing procedure of the bobbin thread remaining amount detection count-up
*
Setting of the bobbin thread remaining amount adjustment counter
*
1) Set the bobbin thread remaining amount adjustment counter to the value shown in the table below.
2) Start the sewing to perform regular sewing. In case of test sewing, adjust the sewing length to that to be
sewn in the actual process.
3) As you continue sewing, the bobbin thread is gradually reduced and the run-out of bobbin thread is dis-
played in the screen when the bobbin sensor detects the reflecting light.
4) At this time, check the length of bobbin thread remaining on the bobbin and properly modify the value on
the counter.
5) Increasing the counter value by 1 will shorten the remaining length of bobbin thread by the amount that
is consumed for one time of sewing.
6) The remaining length of bobbin thread at the time when the indication of run-out of bobbin thread varies
by a certain extent. This variation depends on the type of thread, sewing length and the winding way of
thread.
The remaining length of bobbin thread is shown, as a guide, in the table below. Correct the counter value
in accordance with sewing conditions and the like so that the bobbin thread does not completely run out
during sewing.
Thread count
Counter value
Bobbin thread remaining length for reference (m)
#40
1
0.4 to 2.6
#50
2
0.2 to 2.6
#60
2
0.4 to 2.8
#80
3
0.1 to 3.0
•
The bobbin thread remaining length has to be re-adjusted in the case described below.
1.
When the sewing length for the sewing product has been changed.
2.
When the thread count of bobbin thread has been changed.
• The value of bobbin thread remaining amount counter is cleared by inputting the value of the
bobbin thread remaining amount adjustment counter.
7) If the bobbin has run out of thread, the bobbin thread remaining amount detecting device is incapable of
performing “bobbin thread remaining amount detection”. So, it is very important to specify a value on the
bobbin thread remaining amount adjustment counter to allow the device to give the indication of “run-out
of bobbin thread” when the sufficient amount of bobbin thread remains.
[ The table shows the counter value when the sewing length is set to 150 mm ]
A