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The underthread
breaks.
The under thread is not correctly
threaded in the bobbin capsule.
See, Threading top thread.
Flu has accumulated in the bobbin
capsule.
Clean the bobbin capsule.
The bobbin is damaged and does not
turn smoothly.
Replace the bobbin.
Skipped stitches.
The needle is not correctly inserted. See, Replacing needles.
The needle is bent or blunt. See, Replacing needles.
The needle and/or thread is not suitable
for the fabric.
See, Table of threads and needles.
Another needle than a ballpoint needle
is used for sewing very thin thread,
stretch fabric or synthetic fabric.
See, Table of threads and needles.
The top thread is not correctly threaded. See, Threading top thread.
The seam is
gathered.
The top thread is too tight. See, Adjusting the tension of the
top thread
The threading is not correctly done. See, Threading top thread.
The needle is too thick for the fabric. See, Stitch selection dial
The stitch length is too long for the
fabric.
Set a shorter stitch length.
• When sewing very thin fabric, sew with
tissue paper under the fabric.
The stitches form
loops underneath
the fabric.
The top thread is too loose. See, Adjusting the tension of the
top thread
The thread is too thick or too thin for the
needle.
See, Table of threads and needles.
The fabric is not
fed smoothly.
The feeder is blocked by u. See, Cleaning the gripper and
feeder.
The stitch length is too short. Set a longer stitch length.
The product does
not work.
The plug is not plugged in. See, Mains connection
Thread has fastened in the gripper. See, Cleaning the gripper and
feeder.
The bobbin arrangement axle is in the
right-hand position.
See, Winding of underthread
Buttonhole thread
uneven.
The stitch length is not suitable for the
fabric.
See, Stitch selection dial
The fabric is drawn or held back. Do not use to much pressure to
guide the fabric.
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