62
Thread Break
⑫
Scratch around the area on the
hook and the bobbin where
the thread passesthrough
⑬
Too narrow space between
the hook handle and the
groove of the hook handle
⑭
Lack of oil on the hook
⑮
Inappropriate timing of the
needle and the hook
⒃
Inappropriate lowest point
of the needle
⒔
Scratch on the passage of
the thread
⒕
Vibration due to the
unstable fixture of the
embroidery fabric to the
frame or the hoop
⒖
Inappropriate presser foot
height (in case where the
presser foot does not press
the embroidery fabric)
■
Remove the scratch and
replace the part
■
Adjust the distance
■
Supply oil near the hook
race
■
Readjust the timing of the
needle and the hook
■
Readjust the lowest point of
the needle
■
Check the following areas:
①
Thread passing area on the
presser foot
②
Near needle hole on the
needle plate
③
Thread guide on the head
④
Thread passing area of the
thread tension adjusting device
⑤
Thread passing area near the
upper thread holding device
■
Remove the vibration by
tightly fixing the
embroidery fabric
■
Adjust the height of the
presser foot
■
Check the rotary
hook
■
To adjust the distance,
the upper thread shall
pass smoothly, and
there shall be no
disturbance. The ideal
space is 0.5~0.7mm.
Corrective Action and Check Point
Cause of Trouble
Type
Remarks
0.5~0.7mm