Brother International DB2-B773 Service Manual - Page 39

Adjusting

the

timing

of

upper

feed

horizontal

movement

0

0

1

mm

[DB-B774-0031

When

the

presser

foot

is

positioned

back

1.5

mm

e

I)

[DB-B774-006]

When

the

presser

foot

is

aligned

with

the

reference

line

0

co

O

Upper

feed

dog

L=E

I

Feed

dog

1)

Maximize

the

upper

feed

amount

by

turning the

upper

feed

regulating

plate

assembly.

2)

Maximize

the

feed

amount

by

turning

the

length

control

assembly.

3)

Remove

the

screw

0

and

the

upper

cover

0.

4)

Loosen

the

screws

0.

5)

While

slowly

rotating

the

machine

pulley

in

its

normal

rotating

direction,

press

down

and

pull

up

the

reverse

lever

0,

and

stop

moving

it

where

the

feed

dog

stops.

NOTE:

There

are

two

positions

for

the

adjustment

described

above;

above

and

below

the

needle

plate.

For

this

adjustment,

use

the

above

-the

-plate

position

only.

6)

While

slowly

rotating

the

eccentric

wheel

0,

push

down

and

pull

up

the

reverse

lever

0,

stop

moving

it

where

the

upper

feed

dog

stops,

and

tighten

the

screw

0.

Adjusting

the

clearance

between

the

upper

feed

dog

and

the

presser

foot

1)

Remove

the

face

plate.

2)

Maximize

the

upper

feed

amount

by

turning

the

upper

feed

regulating

plate

assembly.

3)

Slowly

rotate

the

machine

pulley.

4)

The

clearance

between

the

upper

feed

dog

and

the

presser

foot

when

the

two

come

nearest

should

be

about

1mm

for

the

pucker

type,

and

1.5mm

for

the

gather

type.

5)

Loosen

the

screw

(5,

and

adjust

the

clearance

by

moving

the

upper

feed

arm

0

forward

and

backward.

—35-

Brother International DB2-B773 Service Manual - Page 39

Adjusting, timing, upper, horizontal, movement

Page 39 highlights