Bernette 610D - SERGER; OVERLOCK STITCH FORMATIONS; ADJUSTING THREAD TENSIONS; TRIAL SEWING - SERGER; OVERLOCK

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SERGER / OVERLOCK STITCH FORMATIONS SERGER / OVERLOCK STITCH FORMATIONS
ADJUSTING THREAD TENSIONS
Turning tension dial to a higher number gives a tighter thread tension. Turning
tension dial to a lower number gives a looser thread tension. The higher the
number, the tighter the tension.
Test thread tensions on a scrap you plan to use.
Decrease tension
Increase tension
TWO-THREAD USE
Just right. Lower looper thread pulled to
under side.
Fig. 1 Fig. 2
Needle thread pulled to top side.
Decrease needle tension. Increase needle thread tension.
FOUR-THREAD USE
Fig. 1
Just right.
1 Under side
2 Top side
3 Upper looper thread
4 Lower looper thread
5 Right needle thread
6 Left needle thread
7 Needle thread
Fig. 2 Fig. 3
Upper looper thread
pulled to under side.
Lower looper thread
pulled to top side.
Increase upper looper
thread tension and/ or
decrease lower looper
tension.
Increase lower looper
thread tension and/or
decrease upper looper
tension.
Fig. 4 Fig. 5
Left needle thread loose
and visible on under
side of fabric.
Right needle thread
loose and visible on
under side of fabric.
Increase left needle
thread tension and/or
decrease either or both
looper threads.
Increase right needle
thread tension.
After threading is completed, use a scrap of fabric that you plan to sew and test
to sew in the following order.
1. Gently pulling all the threads to the left, lower the presser foot. Rotate the
hand wheel towards you a few times to see if the lock stitches are properly
formed.
2. Start the machine at low speed and feed in test fabric under the presser
foot by slightly pushing it forward. (This can be done with the presser foot
down on most fabrics except bulky materials).
Guide the fabric gently as machine automatically feeds the material.
3. Check thread tensions by test sewing on spare fabric. (See page 13)
4. At fabric end, carry on running machine at low speed, gently pulling the
fabric towards the back, until about 5 to 6 cm of extra lock stitches are
produced without fabric.
Cut thread by with scissors.
TRIAL SEWING - SERGER / OVERLOCK
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1
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2 2 2
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