PROBLEM | PROBABLE CAUSE " | CORRECTION |
|
| Certain; knits | and synthetics; | |||
Skipping: | i: , | Bent | or | blunt | needle .... | |
SIitches |
| Incorrect | :setting of | needle. | ||
|
| Tight | upper thread | tension: | ||
|
| Light | pressure | on presser foo_. | ||
Choose correct size needle for thread and fabric. Use "Q N E_:Dt,_:,_.
Insert new needle,
Reset needle.
Loosen upper thread tension. increase pressure on presser foot.
Breaking Upper
Thread
: .... Starting to stitch too:fast.
improper: :threading.
Tight upperithread tension. incorrect size needle
Sharp eye in needle.
Nicks or burrs on shuttle;
Nir,,ks or burrs:at hole of needle plate.:
Start to stitch at a medium speed,
Rethread machine,
Loosen upper thread tension.
Choose correct size needle for thread and fabric. Insert new needle.
Replace shuttle, or polish off burrs completely.
Replace needle plate, or polish off burrs completely.
Breaking Bobbin:
Thread
Fabric not
Moving
Machine Jamming:
Knocking Noise
Improper bobbin case threading,
Tight bobbin thread tension, Lint in bobbin case or shuttle;
Feed dog down:
Light pressure on presser foot.
Thread knotted :_under :fabric.
Thread caught in shuttle.
Check bobbin case threading.
Loosen bobbin thread tension,
Clean bobbin case and shuttle.
Raise feed dog.
Increase pressure on presser foot.
Place both threads back under presser foot before beginning to stitch.
Disassemble and clean shuttle.
