Baby Lock Lauren (BL450A) Instruction and Reference Guide - Manual (Page 14)

12
4 5
SETTING STITCH LENGTH
The stitch length can be adjusted between 1 and 4 mm.
• For shortest stitch, turn dial to 1. (fig.12-A)
• For longest stitch, turn dial to 4.
As a rule, light weight fabrics take a shorter stitch.
Heavy weight fabrics need longer stitches.
Most normal sewing is done with stitch length dial set at 3. This
produces a medium length stitch which makes a strong seam and is
suitable for most fabrics.
Shorter
Longer
Rear
Front
2.2 mm
“pucker free” seams
no “wavy” seams
fig. 12-C
fig. 12-D
fig. 12-E fig. 12-F
ADJUSTING THE DIFFERENTIAL FEED
This machine has two feed dogs - a front feed dog and a rear feed
dog, which move independently and can be adjusted separately.
This Differential Feed prevents waving in stretch fabrics and insures
pucker-free seams in light weight woven fabrics.
The rear feed motion (main feed) is adjusted by turning the
stitch length regulator dial. The front feed motion is adjusted
by turning the differential feed regulator dial which is located
inside the stitch length regulator dial. (fig. 12-B)
• For normal sewing, set the differential feed regulator dial to
“N”. Both feed dogs will move together and feed evenly.
• For pucker-free seams in delicate or closely woven fabrics,
turn the dial to “0.7”. The front feed dog motion will be
shorter than the rear feed dog motion. The front feed dog
will hold back the fabric enabling the rear feed dog to take
it up behind the needle without any puckering. (fig. 12-C)
• When sewing stretch or knit fabrics, turn the dial towards
“2”. The front feed dog motion will be longer than the rear
feed dog motion and in this manner the fabric can be sewn
without stretching. (fig. 12-D)
The differential feed can be used for gathering or lettuce edging.
• For gathering, set the dial towards “2”. (fig. 12-E)
• For lettuce edging, set the dial towards “0.7”. (fig. 12-F)
SETTING THE SEAM WIDTH
Overedge seam width can be adjusted from 6.2 mm (right
needle 4.0 mm) to 7.2 mm (right needle 5.0 mm) stitch.
Normally the machine is set at 6.2 mm which is the width
most frequently used.
For heavy weight fabrics, set control knob to wider stitch.
1. Turn power switch off.
2. Open front cover and Free Arm Cover.
3. Push the Upper Blade Holder to the right and turn the
Width Indicator Knob downward to select wider stitch
width. For smaller width turn knob in opposite direction.
When adjusting the width, use the markings on the needle
plate as guide and line up with left edge of lower blade width
indicator.
The numbers marked on the needle plate are the width from
the fabric's cut edge to the right needle, and the distance
between needles is 2.2 mm. Therefore the width to left
needle is an additional 2.2 mm.
N
fig. 12-B
0.7
with without
without with
2
Push
4-5 mm
fig. 12-A
Lower
Blade
Width
Indicator
Width
Indicator
Knob