Pfaff 131 Owner's Manual - Page 5

To

regulate

the

tension

of

the

under

thread

The

bobbin

case

is

taken

out

of

the

machine

then,

with

the

screw-driver,

tighten

the

tension

screw

Z

if

the

tension

is

too

loose,

or

,

if

the

tension

is

too

tight

(see

fig.

3).

To

regulate

the

tension

of

the

thread

controller

spring

For

embroidery

work

or

when

darning

it

may

often

be

found

convenient

to

loosen

somewhat

the

tension

of

the

thread

controller

spring.

When

working

thick

or

hard

materials

a

tighter

tension

is

wanted,

By

simply

turning

the

lever

of

the

tension

bushing,

the

desired

tension

of

the

thread

controller

spring

is

being

adjusted

(fig.

4).

a

is

the

position

for

darning

and

embroidery

work

b

is

the

standard

position

for

sewing

c

is

the

position

for

sewing

thick

or

hard

materials.

The

direction

for

turning

the

lever

is

designated

by

the

following

marks:

l=’loose

(light),

f=fast

(tight).

The

Needle

Use

Pfaff

needles

system

130

in

sizes

appropriate

to

the

thickness

of

thread

and

material

used,

consulting

table

on

following

page.

In

order

to

change

the

needle,

raise

the

needle

bar

to

its

highest

point,

loosen

the

needle

clamp

screw

some

what

and

take

out

the

needle

with

your

left

hand,

When

inserting

a

needle,

be

careful

that

the

flat

side

of

the

shank

will

fit

into

the

groove

of

the

needle

bar

and

that

the

long

groove

is

pointing

to

the

left.

Push

needle

as

far

up

as

possible,

then

tighten

the

needle

clamp

again.

8

No.

of

Sice

of

Cotton

I

Class

of

Work

Needles)

Linen

or

Silk

Cotton

150—100

Very

thin

fabrics

70

Schappe

silk

150

-1003

(cambric,

tulle,

muslin)

t7)

Real

silk

150—100/3

fine

linen

(000/001

Cotton

100—80

Very

fine

silk

goods,

Schappe

silk

100/3

fine

linen,

underwear,

Real

silk

100’3

(0)

fine

calicoes

etc.

Cotton

80—60

Thick

underwear,

)9

Schappe

silk

80/3

light

knitted

goods

Real

silk

80/3

(B)

100

Cotton

60—40

Ladies’

clothings,

(10>

Schappe

silk

70/3

hems

umbrellas

Real

silk

70/3

IC)

Cotton

40—30

110

Schappe

silk

60/3

Gents’

clothings,

(11)

ReaLsilk

60/3.

(D)

corsets

etc.

Linen

90—80

Cotton

30—24

I

(121

Real

silk

50/3

(E)

etc.

120

Schappe

silk

50/3

Cloths,

winter

clothing

Linen

80—50

Stitch

regulation:

Forward

and

backward

sewing

The

regulation

of

the

length

of

the

stitches

is

done

by

means

of

screw

M

(fig.

1).

M

pointing

on

0,

the

feeder

does

not

move

at

all.

Moving

screw

M

upward,

the

machine

is

sewing

forward,

and

moving

it

downward,

beyond

0,

it

is

sewing

backward.

Switching

to

backward

stitches

and

vice

versa,

the

same

length

of

stitches

is

retained.

Changing

the

length

of

the

stitches

can

also

be

accomplished

whilst

sewing.

When

embroidering

and

darning,

choose

the

0-position,

using

the

backward

stitch

only

for

tying

forward

seams.

9

Pfaff 131 Owner's Manual - Page 5

regulate, tension, under, thread - 130

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