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Trouble shooting
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:
-
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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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