How Your Serger Operates - Baby Lock Pro Line BL4-838D Instruction Book

1 HOW YOUR SERGER OPERATES

A serger sewing machine (or Overlock, as it is sometimes called) is quite different from any
conventional machine you have used.
Awareness of its simple operation will permit you to become more proficient in its use. The
Baby Lock operates with two needles, but no bobbin. Also involved in stitching are two loopers
each carrying a thread, and two parallel stitch fingers which are the foundation for stitch
formation. When the needle enters the needle plate, the upper looper moves above the palte
and behind the needle. At the same time, the lower looper passes below the plate and in front
of the needle. The threads carried by the needle and the loopers are then knitted together over
the stitch fingers, thus creating the stitch chain. When fabric travels through the machine the
threads then become "locked" over the fabric. As the fabric is fed into the feed dogs, two
cutting knives perform in a scissor – like action to trim the edge prior to stitching. After setting
up your machine for the first time, take a few moments to learn how it sews. Turn the
handwheel (toward you) and watch the movement and operation of the various parts. Don't
bother about fabric right now. It does not hurt your Baby Lock serger to stitch without fabric
under the presser foot.
1 –1 Accessories
Accessory
Instruction manual
Curved tweezers
Lint brush
Screwdrivers
Spool caps
Thread nets
Needles
Lower knife replacement blade
Machine cover
Number included
1
1
1
2
4
4
5
1
1
3
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