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Outline of Mechanism Operation of other electronic components
Start/Stop (SS) button. . . . . . . . . . . . . . . . . . Button for starting and stopping the sewing machine. The
machine operates at a slow speed while the button is being held
down.
Reverse/Reinforcement stitch button . . . . . . This button is for reverse stitching or ending a seam. If the
button is pushed, it makes three to four stitches in that place and
stops automatically. It sews in the reverse with slow speed while
the button is held down.
Needle position button . . . . . . . . . . . . . . . . . This button toggles the needle between the up and down
positions.
Operation panel keys . . . . . . . . . . . . . . . . . . Input for pattern selection and conditions necessary for sewing.
Speed control lever. . . . . . . . . . . . . . . . . . . . This lever controls the speed of sewing.
BH (button hole) switch. . . . . . . . . . . . . . . . This switch is for detecting the forward and rear ends of the
button hole according to the BH presser foot and lever.
BH (button hole) lever switch . . . . . . . . . . . This switch detects whether the BH lever is up or down.
Needle position (NP) sensor. . . . . . . . . . . . . This sensor detects the drive timing of each pulse motor and the
vertical stop of the needle position. It detects the upper shaft
angle of rotation by using a shutter attached to the upper shaft
and an opitical sensor.
Speed sensor. . . . . . . . . . . . . . . . . . . . . . . . . This sensor detects the rotational speed of the main motor. It
detects the upper shaft rotational speed by using a shutter
attached to the upper shaft and an optical sensor.
PF (Presser foot) switch . . . . . . . . . . . . . . . . This switch detects the vertical position of the presser foot lever.
BW (bobbin winder) switch. . . . . . . . . . . . . This switch detects whether the bobbin is set for winding or not,
when the bobbin thread is wound.
Foot controller jack . . . . . . . . . . . . . . . . . . . This is the jack for plugging in the foot controller in use.
LED lamp. . . . . . . . . . . . . . . . . . . . . . . . . . . White LED lamps for illuminating the work space.
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