Bernina 900 Manuale utente

* -

S* S

Contents

General

information

Initial adjustment

operations

The

needle

.. . . .. . . . 5

Needle

spacing

the

stitch

hole

Adjusting

the

scanner

Scanner

lift

.a...

. . .. . 8

Adjusting

the

stitch

position

L-

C-

Centering

the

zig-zag

link

the

link

spindle

Neutral

position

of the

needle

Lateral

needle

movement

Zig-zag

stitch position

Lateral

motion

needle

during zig-zag

and

plain

stitch

sewing

.1..

Adjustment

the zig-zag

width

4,5

mm.

Adjusting

the

zero

position

the

stitch

length

crank

Adjusting buttonhole

without

thread.

Adjusting

the

forward

and reverse beads

Adjusting

the

shuttle

. . . .

....

Adjusting

the

return

motion

. ... . .

Loop lift

Needle

height

.,..

Lateral

shuttle adjustment

Thread

guide plate

Material

feed

Feed

dog

height

. . . . . . . ...

Feed

dog movement

(Vertical)

Presser

foot

bar

- --

Upper

thread

tension

Lower

thread

tension-

Adjusting

the

thread

regulator spring

Foot

pressure

Winder

Retightening

the

drive

belt

Electrical

section

Adjusting

Motor

speed

.-.. . . .

Type

Zig-zag

and

plain stitch

sewing

machine

electronic

with

built-in

cams and

automatic

button-

holer

with

built-in

cams.

Valid

for

model 900

electronic

trom

machine

no.

200

551

314

178

Fig.

Max.

zig-zag

width

Stitch

distribution:

Left-Center-Right

Max.

forward

stitch

length

Max.

reverse

stitch

lengeh:

Presser toot

lift:

6.5

Passage

space:

105

200

Base

plate

dimensions:

374

178

Shuttle

system: Jam-free

central

bobbin

shuttle

Bobbin

capacity:

cotton

yarn

Needle

system:

705

Needle

movement,

Swinging

needle

bar

Thread

teed: Hinged

take-up

lever

Thread

tension:

Upper

thread

tensioner

frame

Built-in

Winder: Built-in

Motor

Power. 90W

Sewing

lamp

(built-in)

Power-

15W

Number

stitches:

Approx

1100

stitches

min

Weight

(complete)

10i5

Setting

needle:

705

B-80

Needle

deflection:

With

lifting

bar

suspension:

Needle

plate upper edge:

4.5

shuttle

tip: 463

Needle

bar

stroke:

Loop

stroke:

left

Shuttle

travel:

220

18'

Rack

travel:

34.6

Lift

crank

radius

Take-up

lever

travel:

Presser

foot

lift:

6.5

Darner

stroke:

2,92

Speed:

Motor:

7400

rpm

Cone

pulley:

2372

rpm

Frame

shaft:

1120

rpm

Gear

ratio:

Overall:

6.6

Motor:

Cone

pulley

312

Cone

pulley:

spindle

2,12

Base

circumference:

245

Machine

dimensions:

Overall

length:

399 mm

Overall

width:

178

Overall

height:

350.5

; 4

Fig

Initial

adjustment

operations

Rotate

zig-zag

knob

(13)

postion

(0)

Unscrew

mounting screw

knob

(13)

and

rF_

emove knob,

Set

slihch

selection

knob

(14)

position

(A)

-------

Unscrew

the

assoc

ated

mounting screw

and remove

Knob

and

scale

together

with

wheel,

#^i

_ gUnscrew

both

Phiillips

screws

(130)

and

-lr

renmove

cover

plate

(129),

The

screws

are

riot

visible

until

knobs

(1:.)

and

(14)

hav

been

removed Remove

frame

cover

(128)

and

end

cover

(5)

(Light

switch

has

been

switched

,on>.n

Temporariy

reinsert

zig-zag

krob

(13)

and

stitch

selection

knob

(14)

together

with

scale,

Adjustments

can

now

carried

out

After

adjustments

have been

made rein-

sert

parts

reverse

order.

IMPORTANT:

The

sewing machine

can

completely

adjusted

and sewn

oft

prior

mounting

covers

128

Adjustment

the

type

900

sewing

machine

: |

<::

land

other

rnodels)

.hese

adjustmen

instructions

are

des:g-

ned

assist

minor

repairs

adjust-

130

ments

the

BERNINA

sewing

machine

129

~~tPe

900.

129

tMPORTANT:

The

sewing

mach

must

perfect

mechanical

condition

(run-

{ning

smoothly.

properly

oiled

etc.)

tha!

idividual

adjustments

can

carried

out

correctly,

-__________________

the

sequence

adjustments

obser-

ved

r peccable

speration

the

machine

onsured

The

needle

The

needle

one

the

most

important

BERNINA

uses

the

"705

B,,

needle system

elements

the

sewing

rnachine.

pier-

without

fluting

(Singer

designation:

xl1

ces the

fabric

and

forms

loop which

all

domestic

sewing

machines

with

caught

the

shuttle

and

joined

with

CB-shuttle

hook.

the

lower

thread

The

loop

formed after

The

metric

system

has

been

unse

since

the

needle

has

pierced

the

fabric

and

has

1947

for

needle

thickness designation.

reached its

lowest

point.

The

needle

lifts

needle

thickness

100

means

that

the

slightly

during

the

so-called

loop

ift

needle

stem

is 1

thick.

The

tightly

drawn

thread

which

lies

the

No.80

needle

0,8

mm:)

long

and

short

grooves

on the

front

and

The

needle

must

firmly

secured

the

rear

side

the

needle,

respectively,

knurled

screw

the

needle holder.

caught

above the

short

groove

between

the

needle

stem

and

the

material,

When IMPORTANT:

Always

use

needle

the

needle

moves

upward,

the

thread

feed

for

all

adjustrnents

unless

otherwise

sta-

retarded

due

the

friction

the

ted,

Check

the

needle

prior

every

ad-

fabric

and

thereby

loop.

comming

from

justment

the sewing machine.

must

the

needle

eye,

formed

the

rear

side

always be

straight.

the

needle

This loop

caught

the

shuttle

tip,

widened,

and

guided

around

the

lower

thread

supply.

The

important

features

the

sewing

needle

are:

shank

for

securing

the

needle

the

needle

bar

stem

with

short

and

long

groove

needle

eye

needle point

needle

length

Fig

Needle spacing

the

stitch

hole

The

rieedle

must

penetrate

the

center

the

stitch

hole

(as

viewed

from

the

direc-

tion

fabric

feed)

(needle

thickness:

Fig

0~~~~

most

removed.

Then, loosen

two

the,

three

frame

mounting

screws

(Allen

fl51

screws

with

interior

hexagon

width

vmm)

an.d

move

the

machirie

frame

urnt

the

needle

penetrates

the

center

the

ASt

hole.

Rotghilen

Fig.

Adjusting

the

scanner

the

center Rotate

handwheel

until

scanner

(119)

isat

cam

(Running

stitch)

by dis-

the

highest point

cam

(120).

Loosen

placing

the

adjusting

drum

mounting

screws

(121)

the

adjusting

drum,

Position

the

scanner

precisely

Set

zig-zag

knob

(13)

position

"4-

and

the

center

cam

(5)

axially

moving

stitch

selection

knob

(14)

cam

adjusting

drum

(122)

and

retighten

mount-

(D)

ing

screw

(121).

Check

also

the

front

and

rearmost

cam,

<:D tR l~~~~~~22

*__9

12l0

129 r

138

137

139

Fig

::___

127

124

123

~~U ¼

Fig.

Raising the

scanner Position

lifting

cam

The

scanner

19)

raiset

sjn

the

When

the

scanner

(tl9i

the

inwest

camri

l123K

which

fitted

c)'

.pinidle

poirt

the

zigzaq

eanm

there

mus

the

below

the

arLjusting

drunm

in f

Ii"

gng

illi

little

play between

lifting

arm

124I

and

lt.

i124)

which

ad)iustabIe

nconnecter

ting

carn

1123)

the

cam

control

lever

the

play

can

observed

Lrriiq

the

The

lting

arm

124i

Idlius't

toilows

stitch

selector

knob

tl4i

gently

iL-and

-ro

Set

gzag

arijusting knob

(

posit

bur;ng

this

checs.k

convenient

press

and

scanner

highest

point

zigzag

the

cam

control

leve,

1125)

against the

ziy-

cam.

Place

space,

'12b

be'-

zag

camn

play

apparent

the

ween

Scanner

and

cam

Sel

stit-

h'selector

stitch

selector

knob

(14),

correction

shoulcd

knob

(14)

between

zigzag

and

biindstitch

be made

follows

oosen

fixing

screw

1127)

lifting

arm

loosen

screw

1162i

The

control

sponrig

124)

Fhis

drawn

the

iilting

cam

(123t

it61i

(see

Fig

ila)

can

then

displaced

Ihe

liftinq

arm

tension

Tsprn

'200,

lhe

sideways

until play

can

observed

the

fixing

screw

i127)

then retigetened

stitch

selector

knob

14.

Re-tighten

screw

1162)

tig.

_a;i _ i f U

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