Pfaff coverlock 4850 Owner's Manual - Page 40

DfferentiaI

feed

The

differential

feed

consists

of

two

feed

dogs

(A

÷

B),

one

behind

the

other,

which

fled

the

fabnc.

The

movement

of

the

front

feed

dog

IA)

and

thus

the

:imount

of

mater

al

to

be

fed

can

be

oqulated

using

he

r-iou

ator

wheel

41.

The

setting

iange

5

between

0.5

and

2.0.

The

standard

setting

is

1

0,

where

the

movement

of

the

front

feed

dog

(Al

s

syn

.Iironized

with

the

rear

feed

dog

(B).

This

means

that

the

front

feed

clog

feeds

the

same

amount

of

fabric

as

the

rear

fred

dog.

Note:

The

function

of

the

differential

feed

3(50

depends

on

the

set

stitch

length

and

the

type

of

fabric

being

used

A

/,s.

5

5’

:4

\‘

.5,

.‘

.

Here

you

will

avoid

gathering/puckering

of

the

seam

when

working

with

very

light

fab

des,

such

as

silk

and

taffeta,

Instead,

a

smooth

seam

(A)

will

he

achieved.

You

can

also

achieve

decorative

effects

with

the

differential

feed

dog,

For

example

the

wavelike

effect

when

using

a

rib

knit

(B).

I

4

4

3et

the

iegu(ator

wheel

for

th

differential

eed

41

to

0.5.

At

this

setting the

front

feed

doq

feeds

half

as

fast

as

the

rear

feed

dog.

This

means

that

the

front

feed

dog

feeOs

nly

half

as

ouch

fabric

es

the

rear

feed

.ioq,

ausing

the

fabdc

to

stretch.

36

Pfaff coverlock 4850 Owner's Manual - Page 40

gathering/puckering

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