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