Remaining Bobbin Thread Sensor - ELNA eXpressive920 Service Manual

Remaining bobbin thread sensor

Reverse
stitch button
Start/Stop button
Bobbin holder
"Key" value
"Empty" value
"Half" value
Mechanical Adjustment
Knob
Stopper
"Full" value
1. Prepare an empty bobbin, half wound bobbin (wind to
12.5 mm diameter) and full wound bobbin (wind to18.9 mm
diameter).
2. Turn the power switch ON while pressing the Start/Stop
button and the Reverse stitch button to enter the factory
setting mode.
Press "Bobbin" key.
4. Remove the presser foot and needle plate.
Insert the empty bobbin in the bobbin holder.
5. Rotate the bobbin holder counterclockwise so that the
knob fits to the stopper in the hook race.
6. Press "Key" and read "Key" value. Press "Key" a few times
until the same "Key" values are indicated.
Press "Empty" to memorize the "Key" value. This value is
memorized as the "Empty" value.
7. Replace the empty bobbin with the half wound bobbin.
Press "Key" a few times until the same "Key" values are
indicated. Press "Half" key to memorize it as the "Half"
value.
8. Replace the half wound bobbin with the full wound
bobbin.
Press "Key" a few times until the same "Key" values are
indicated. Press "Full" key to memorize it as the "Full"
value.
9. Press "OK" key.
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