Singer 20U-109 Instruction Manual - Page 29

Zigzag

Sewing

Machine

Instruction

Manual

and

Parts

List

Knee

operating

stitch

width

control:

Bell

cranks

'1'

and

'2'

shown

in

Figure

35

are

fastened

to

the

underside

of

the

bed,

Bell

crank

'1'

is

used

for

lifting

and

lowering

the

presser

foot

with

knee

and

bell

crank

'2'

is

used

for

controlling

the

stitch

width.

To

control

the

stitch

width

with

knee,

loosen

screw

'4'

holding

the

knee

lifter

shaft

arm

'3'

and

move

knee

lifter

shaft

arm

'3'

just

under

the

bell

crank

'2'

and

firmly

tighten

screw

'4'.

Loosen

the

lock

nut

holding

screw

'7'

and

turn

screw

'7'

as

required,

so

that

the

bent

end

'6'

of

knee

lifter

shaft

arm

'3'

will

be

almost

horizontal

when

knee

lifter

knee

plate

'5'

is

pushed

as

far

as

it

will

go

in

the

direction

indicated

with

arrow

'A'.

Then

firmly

tighten

the

lock

nut.

With

knee

lifter

shaft

arm

'3'

set

in

position

as

described

above,

loosen

screw

'8'

and

move

knee

lifter

shah

arm

'3'

up

or

down

as

required,

so

that

height

'10'

from

its

bent

end

'6'

to

bracket

is

67

mm.

Loosen

stitch

width

regulating

plate

thumb

screws

'11'

and

'12'

so

that

stitch

width

regulator

'13'

can

be

moved

from

zero

to

maximum

stitch

width.

(20U-109

/

109C

/

308:

9mm

or

20U-112

/

112C:

12mm).

Loosen

the

lock

nut

holding

screw

'14'

and

turn

screw

'14'

as

required,

so

that

knee

lifter

knee

plate

'5'

when

pushed

in

the

direction

indicated

with

arrow

'B',

will

stop

at

the

maximum

stitch

width

position

of

stitch

width

regulator

'13'.

Then

firmly

tighten

the

lock

nut.

Stitch

width

will

become

wider

when

knee

lifter

knee

plate

'5'

is

pushed

in

the

direction

indicated

with

arrow

'B'

and

will

become

smaller

when

knee

plate

is

released.

10

67

rnm

12

11

14

2

Figure

35

3

Caution:

•

Switch

off

the

machine.

•

Set

sewing

head

upright

again

using

both

hands.

•

Danger

of

crushing

between

sewing

head

and

table

top

13

Singer 20U-109 Instruction Manual - Page 29

regulating

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