Fault Finding Chart - Siruba HSP-68100 Instructions Manual

FAULT FINDING CHART

Suspected
problem
Threads kink - Upper thread improper threading.
together under - Upper tension dial at O position.
the fabric.
- Incorrect size needle.
- Improper threading.
- Loosen top thread tension
Irregular - Pulling fabric.
stitches - Loose presser foot.
- Unevenly wound bobbin
- Nicks or burrs at needle plate.
- Needle plate broken
- Wrong needles size for the fabric.
- The needle has not installed. The needle
is curving.
Breaking needle - Pulling fabric.
- The needle clamp screw is loose.
- Rotate the pattern dial when needle
insert the fabric.
- Loose presser foot.
Bunching of - Upper and lower threads not drawn back
thread under presser foot before starting seam.
- Incorrect thread tension.
- Upper thread improper threading.
Puckering - Using two different sizes or type thread.
- Bent or blunt needle.
- Loosen presser foot
- Fabric too sheer or too soft.
- Incorrect size needle.
Skipping
stitches - Bent or blunt needle.
- Incorrect setting of needle.
- Improper threading.
Probable cause
- 36 -
Possible easy correction
- Re-thread. See page 12
- Increase upper thread tension. See page 15
- Choose correct size needle.
- Re-thread. See page 12
- Tighten top tension. See page 15
- Gently pull the fabric.
- Re-set presser foot.
- Re-wind bobbin. See page 8、 、 、 、 9
- Cleaning bobbin case and base. See page 34
- Change needle plate.
- Choose a needle to suit the thread and fabric.
- Re-set needle. See page 6
- Gently pull the fabric.
- Truly locks the needle clamp screw.
- When choice pattern, the needle must above
the fabric.
- Re-set presser foot.
- Pull both threads under and back of presser
foot, then rotates the hand wheel with right
hand.
- Re-set thread tension. See page 15
- Re-thread. See page 12
- Use same size and type threads.
- Insert new needle.
- Re-set presser foot.
- Use underlay or tissue paper.
- Choose correct size needle for thread and
fabric. See page 17
- Insert new needle.
- Re-set needle. See page 6
- Re-thread. See page 12