Pfaff hobbylock 4762 Owner's Manual - Page 28

Differential, standard

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Differential feed The differential feed consists of two feed dogs (A + B), arranged one behind the other, which move the workpiece, Adjust ment lever 30 regulates the movement of the front feed dog (A), and thus the amount of fabric to be fed through. It can be adjusted within the range 0.5 and 2.0. The standard adjustment is 1 .0, by which the front feed dog (A) moves syn chronously with the rear feed dog (B), i.e. the front and rear feed dogs both move the same amount of fabric. Note: The effectiveness of the differential feed also depends on the stitch lenght selected and the type of fabric used. A If differential feed adjustment lever 30 is set to 0.5, the front feed dog moves half as fast as the rear feed dog. i.e. the front feed dog feeds through only half as much fabric as the rear feed dog. As a result, the fabric is stretched, This prevents the seam from becoming gathered when sewing very delicate fabrics such as silk and taffeta. The result is a smooth seam (A). Fashionable touches can also be intro duced in this way, such as the wave effect when using rib knit (B). 24

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Differential
feed
The
differential
feed
consists
of
two
feed
dogs
(A
+
B),
arranged
one
behind
the
other,
which
move
the
workpiece,
Adjust
ment
lever
30
regulates
the
movement
of
the
front
feed
dog
(A),
and
thus
the
amount
of
fabric to
be
fed
through.
It
can
be
adjusted
within
the
range
0.5
and 2.0.
The
standard
adjustment
is
1
.0,
by
which
the
front
feed
dog
(A)
moves
syn
chronously
with
the
rear
feed
dog
(B),
i.e.
the
front
and
rear
feed
dogs
both
move
the
same
amount
of
fabric.
Note:
The
effectiveness
of
the
differential
feed
also
depends
on
the
stitch
lenght
selected
and
the
type
of
fabric
used.
If
differential
feed
adjustment
lever
30
is
set
to
0.5,
the
front
feed
dog
moves
half
as
fast
as
the
rear
feed
dog.
i.e.
the
front
feed
dog
feeds
through
only
half
as
much
fabric
as
the
rear
feed
dog.
As
a
result,
the
fabric
is
stretched,
This
prevents
the
seam
from
becoming
gathered
when
sewing
very
delicate
fabrics
such
as
silk
and
taffeta.
The
result
is
a
smooth
seam
(A).
Fashionable
touches
can
also
be
intro
duced
in
this
way,
such
as
the
wave
effect
when
using
rib
knit
(B).
A
24