Adjusting bobbin-thread tension – SINGER 5102 User Manual
Page 15
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REPLACING THE BOBBIN CASE
1. Hold bobbin case by latch, with about 7.5cm
(3 inches) of thread leading off top of case.
2. Align protruding finger A with slot B and
slide case on to stud C.
• Release the latch and push case until it
clicks into place. Allow 7.5cm (3 inches) of
thread to hang free from bobbin case.
• Close cover plate. Be sure thread does not
get caught when cover plate is closed.
ADJUSTING BOBBIN-THREAD TENSION
The bobbin-thread tension has been set at the
factory for most types of stitching. You may
wish to adjust the bobbin-thread tension when
straight stitching on fine fabrics or to balance
an open zig-zag stitch. Bobbin and needle
threads lock at the corner of each stitch when a
zig-zag stitch is balanced. To adjust the bob-
bin-thread tension, follow the procedure below
using two layers of scrap fabric.
• Raise the presser foot.
• Raise needle to highest position by turning
the hand wheel toward you.
• Open cover plate and remove the bobbin
case as instructed on page 12.
• Slowly turn screw D to the left, using the
small screwdriver in your accessory box,
until desired stitch appearance is reached.
• When stitching is completed, turn screw D to
the right, back to original position, for all
other sewing.
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