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3-11-1. Selecting the bobbin changing method
<Sensor screen>
<Memory switch data list screen>
When you press
Ⓐ
, the bobbin thread changing method setting screen is displayed.
AW bobbin changing method can be set to the "auto" or "manual".
・
In the case you have selected 0 (zero) with the memory switch
U170, the remaining thread detection sensor will not be used.
The number of stitches to be sewn before changing the bob-
bin is automatically set in accordance with the loaded pattern
and the preset bobbin thread winding length. In addition, the
number of stitches to be sewn before changing the bobbin is
automatically updated by the remaining thread margin length
at the time of changing the bobbin.
・
In the case you have selected a setting other than 0 (zero)
with the memory switch U170, the detection sensor will be
used.
If the sensor input value becomes smaller than the thresh-
old of the remaining amount detection sensor, the remaining
thread amount will be calculated using the U171 setting and
the bobbin will be changed automatically. In addition, the num-
ber of stitches to be sewn before changing the bobbin will be
automatically updated by the remaining thread margin length
at the time of changing the bobbin.
■ Method of adjusting the remaining thread amount (optional)
1) Place an empty bobbin in the bobbin case. Then, put the bob-
bin case in the hook.
2) Sensor value
A
is displayed on the sensor screen.
・
Upper limit value → The maximum value of U170 (remaining
amount detection threshold)
・
Lower limit value → The minimum value of U170 (remaining
amount detection threshold)
* When you want to adjust the remaining thread length so that
a longer thread remains on the bobbin, increase the setting of
U170.
* When you want to adjust the remaining thread length so that a
shorter thread remains on the bobbin, decrease the setting of
U170.
A
The maximum setting of U170 is the "lower limit value
+ 50".
