SECTION 4. PERFORMANCE PROBLEMS CHART
What to Do When
PROBLEM PROBABLECAUSE CORRECTION
hregtHar Stttches
B_eakmg Needle
Rtmch,_g of Thread
Pucker ing
Incorrect size needle.
Improper threading.
Loose upper thread tension.
Pulling fabric.
Loose presser foot.
Unevenly wound bobbin.
Nicks or burrs at hole of needle plate.
Ch'oose correct size needle for thread and fabric
Rethread machine.
Tighten upper thread tension.
Do not pull fabric; guide it gently.
Reset presser foot.
Rewind bobbin,
Replace needle plate, or polish off burrs completely
Pulling fabric. Do not pull fabric; guide it gently.
Incorrect size needle. Choose correct size needle for thread and fabric.
Incorrect setting of needle, Reset needle,
Loose presser foot. Reset presser foot.
Upper and lower threads not drawn back When starting a seam be sure to draw both threads under and
under presser foot before starting seam. back of presser foot about 4" and hold until a few sthches are
formed.
Incorrect thread tension. Reset thread tension.
Using two different sizes or kinds of thread. Upper thread and bobbin thread should be same size and kind.
Bent or blunt needle. Insert new needle.
Loose presserfoot. Reset presserfoot.
Fabric too sheer or too soft. Use underlay of tissue paper.
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