Lewis 150-2 - Page 18

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To

secure

this

setting,

the

following

steps

and

adjust-

ments

are

taken

and

made:

17

Turn

the

hand

wheel

in

clockwise

direction;

that

is,

the

top

of

the

hand

wheel

will

be

moved

away

from

the

operator

very

slowly

until

the

long

prong

of

the

looper

is

over

the

center

line

of

the

needle.

Loosen

the

looper

yoke

olamp

screw

-

See

Adjustment

4,

Figures

2

and

5 -

and

roll

the

looper

until

the

long

prong

of

the

looper

just

clears

the

scarf

of

the

needle.

Loosen

the

sleeve

clamp

screw

-

See

Figure

2 -

this

permits

the

looper

eccentric

sleeve

to

be

moved

from

left

to

right

-

and

slide

the

looper

eccentric

sleeve

-

Figure

2,

adjust-

ment

6,

until

the

long

prong

of

the

looper

is

3/32

11

from

the

in-

ner

end

of

the

needle

eye.

Check

to

see

that

point

of

the

long

prong

of

the

looper

just

clears

the

scarf

of

the

needle.

Tighten

the

looper

yoke

clamp

screw

-

See

Figure

5,

and

the

looper

eccentric

sleeve

clamp

screw

-

See

Figure

2.

Continue

to

rotate

the

hand

wheel

in

clockwise

direc-

tion,

until

the

short

prong

of

the

looper

is

at

nearest

point

when

pas

sing

chaining

finger,

if

foot

has

chaining

finger,

not

exceed-

ing

l/32

11

-

See

Figure

7.

If

the

short

prong

does

not

clear

the

chaining

finger,

or

if

the

clearance

is

greater

than

1/32'',

then

the

previous

adjustments

have

not

been

correctly

made,

and

these

should

be

re-made.

Continue

to

rotate

the

hand

wheel

in

clockwise

direc-

tion

until

the

short

prong

of

the

looper

has

passed

the

edge

of

the

looper

slot

in

the

foot.

If

the

short

prong

of

the

looper

does

not

enter

the

looper

slot

in

the

foot,

adjust

so

that

the

short

prong

will

clear

the

edge

of

the

looper

slot

in

the

foot

by

moving

the

looper

eccentric

sleeve

-

Adjustment

6,

Figure

2.

Move

the

looper

eccentric

sleeve

the

least

amount

possible

so

that

the

short

prong

clears

the

edge

of

the

looper

slot.

Care

must

be

taken

now

as

the

needle

may

strike

the

crotch

of

the

looper

when

the

needle

should

be

entering

between

the

prongs

of

the

looper.

Continue

to

turn

the

hand

wheel

in

clockwise

direction

until

the

point

of

the

needle

should

enter

between

the

prongs

but

instead

of

so

doing

strikes

the

crotch

of

the

looper

-the

following

corrective

steps

are

required:

From the library of: Superior Sewing Machine & Supply LLC

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