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PROBLEM
CAUSES
Upper thread
Machine is not properly threaded
breaks
Thread entwined around bobbin
Needle inserted incorrectly
Thread tension is too tight
Thread of poor quality, or incorrect size
Bobbin thread
Bobbin is not well adjusted
breaks
Bobbin thread is unevenly wound, or too full
Sewing lint has collected in bobbin holder
Skipped stitches
Needle is not inserted properly
Needle is bent
Needle size is incorrect
Wrong type of needle,
Fabric puckers
Machine is not properly threaded
Bobbin threaded incorrectly
Needle point is blunt
Thread tension is too high
Thread loops
Bobbin incorrectly inserted
Machine is incorrectly threaded
Thread tension is wrong
Threader does not
Needle is not inserted in highest position
thread needle eye
Needles inserted incorrectly
Needle is bent
Machine does not
Feed dogs are lowered
feed properly
Too much fluff gathered in the transport
mechanism and casing
Needle breaks
Fabric pulled while sewing
Needle hits presser foot
Needle is not inserted correctly
Wrong needle size or wrong thread
Machine runs with
Fabric remnants and fluff gathered in the
difficulty
transport mechanism and casing
Machine does not
Machine is not plugged in properly
function
On/off switch is set off
Bobbin winder spindle is pushed to the right
Presser foot is not lowered
When making button holes:
-
-
Site:
www.matri.eu
Buttonhole lever is not lowered completely
Buttonhole foot is not attached
www.matrimatic.com
CORRECTIONS
Re-thread machine
Remove entwined thread and rewind
bobbin
Re-insert needle
Adjust thread tension
Only use high grade, new thread
Remove and re-Insert bobbin
Rewind new bobbin do not wind thread
by hand
Remove needle plate, remove lint with brush
Insert the needle and push fully inside the
casing
Insert a new needle
Select the right thickness (Jeans for ex.
need stronger needles)
Check needle with type of fabric, (use
stretch needle needle)
Re-thread machine
Rewind a new bobbin
Insert a new needle
Adjust the thread tension
Rewind and re-insert bobbin
Re-thread the machine
Adjust the thread tension
Adjust needle height
Re-insert needle
Insert new needle
Raise the feed dogs
Clean bobbin casing and surroundings
Do not push or pull fabric
Choose correct foot and pattern
Re-insert needle
Select correct needle and thread
Remove needle plate and clean bobbin
holder and surroundings thoroughly
Push plug deep in socket
Set on/off switch on
Push spindle to the left
Lower presser foot
When making button holes:
- Lower button hole lever
-
Attach buttonhole foot
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12-B
12-AB
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