6
CONDITION CAUSE HOW TO FIX REFERENCE
3. BREAKING 1.INITIAL SEWING SPEED IS START WITH MEDIUM SPEED.
UPPER TOO FAST.
2.THREAD PATH IS USE THE PROPER THREAD
INCORRECT. PATH.
3.NEEDLE IS BENT OR DULL. REPLACE WITH A NEW NEEDLE.
4.UPPER THREAD TENSION IS ADJUST UPPER THREAD P.12
TOO STRONG. TENSION CORRECTLY.
5.NEEDLE SIZE IS USE APPROPRIATE NEEDLE
INAPPROPRIATE FOR FOR FABRIC AND THREAD
FABRIC. IN USE.
6.NEEDLE EYE IS WORN. CHANGE THE NEEDLE.
7.NEEDLE HOLE IN NEEDLE REPAIR THE HOLE OR
PLATE IS WORN OR BURRED. REPLACE THE NEEDLE PLATE.
4. BREAKING 1.INCORRECTLY THREADED THREAD BOBBIN CASE
BOBBIN BOBBIN CASE. CORRECTLY.
2.TOO MUCH THREAD IS ADJUST THE POSITION OF
WOUND ON THE BOBBIN. STOPPER.
3.LINT IS STUCK INSIDE THE CLEAN THE HOOK RACE.
BOBBIN HOLDER.
4.THREAD QUALITY IS CHANGE TO A HIGH QUALITY
POOR. SEWING THREAD.
5.THREAD IS JAMMING ON CLEAR OUT THE JAMMING
THE BOBBIN. THREAD.
6.BOBBIN THREAD TENSION IS ADJUST BOBBIN THREAD P.13
TOO STRONG. TENSION CORRECTLY.
5. NEEDLE 1.NEEDLE IS HITTING THE SEE MECHANICAL P.16
BREAKS NEEDLE PLATE. ADJUSTMENT “NEEDLE DROP.”
2.NEEDLE IS BENT OR WORN. CHANGE THE NEEDLE.
3.NEEDLE IS HITTING THE SEE MECHANICAL P.17, 18
HOOK RACE. ADJUSTMENT “CLEARANCE
BETWEEN NEEDLE AND HOOK”.
4.THE FABRIC MOVES WHILE SEE MECHANICAL P.15
THE NEEDLE IS IN IT, OR THE ADJUSTMENT “NEEDLE SWING”.
NEEDLE ZIGZAGS
WHILE IN THE FABRIC.
5.FABRIC IS BEING PULLED TOO GUIDE THE FABRIC GENTLY
STRONGLY WHILE SEWING. WHILE SEWING.
THREAD
THREAD
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