Bernina 1230 User manual

BERNINA

Service

manual

1230

(Supplement

service

manual

1130/20)

FRITZ

GEGAUF

LTD.

Manufacturers

BERNINA

Sewing-Machines

8266

Steckborn Switzerland

88/10

006

807

Impressum

Authers:

P. Kenyon

Kalberer

Graphics:

Rapold

Typeset

and printed:

Bodan

AG,

Kreuzlingen

1230

Contents

Page

Technical

data

Description

L-4200

A-1230

S-1230

Block

schematic

model

1230

Plug

connections

A-1230

S-1230

L-4200

Diagnosing

instructions

Test

adapter

L-4200

Power

supply

4200

Test

panel

1230

Test

programme

with

service-panel

Warning against

dangerous voltages

Starting

the

service

programme

Ending

the

service

programme

Diagnosis

18+19

Test

L-4200

L-4200/R-4200

(Drive

signal)

Connection

S-1

230/L-4200

Mains

cord

(cord

reel)

Connection

S-1

230/foot

control

unit

Print P-4200

Complete

light

holder

Hi Step

motors:

PrintS-1230

Hall-sensors

Position

Hall-sensorS.L.

Position

Hall-sensor

S.B.

Step

motors

pinning

position

Foot

control

unit

Foot

control

digital/analog

A-1230

Print S-1230

L-4200

Ret-button

Equalization

the

forward/reverse

feed

P1,2

Buttonhole

35+36

Sewing-off:

Stitch

length

Stitch

width

Needle

position

L.C.R.

Long

stitch

Function

test

1230

Important:

comparison

the

models

1230

and

1130

not

made

from

technical

point

view.

They

are identical.

All

gauges,

instruments,

adjustments

etc,

which

are

applicable

model

1130

are

also

valid

here.

BERNINA

has

only

changed

the

test

programme

which

also simplifies

things

for

you.

These

instructions

are to

be used

conjunction with

the

service

manual

cl.

1130.

This

manual

remains

the

property

our

company,

repro-

duction, publication or information

third

party

without

our

written

approval

forbidden.

FRITZ

GEGAUF

LTD.,

Manufacturers

BERNINA

Sewing-Machines

Steckborn

(TG)

Switzerland

1230

Technical

data

BERNINA

model

1230

Stitch

lenght

max.

forward

5 mm

Automatic

long

stitch

mm/2:1

max.

reverse

5 mm

Basting

device

30mm/6:1

Increment

0-1

0,05mm

Working

space

105x195mm

1-3

0,1

Overall

length

375mm

3-5

0,2

Overallwidth

184mm

Max.

stitch

width

5,5

Overall

heigth

350

Increment

0,1

Motor

Needle

system

130/705

stitches

per/min.

min.-max.

120-1050/min

Adjusting

needle

130/705

H/TCN

reduced

min.-max.

120-600/min

Hook

system

BERNINA

Central

bobbin

Sewing

light:

bulb

2x6

V/4

Lowest

point

needle

bar =

degree Weight

10,5kg

Presser

foot

height

7,5

Darning

foot

heigth

0,5

Features

and

functions

Needle position

Stitch

pattern

extended,

stitch

density

Light

beam

remains constant

Zig-zag

and

stitch

lenght

(freely

adjustable)

needle limiter

Automatic

basis

adjustments

Memory

Basic

marking

Blinker

practical

stitches

without

reverse

motion

LED

display

for

presser

foot

practical

stitches

with

reverse

motion

Upper

needle

stop

(general)

decorative

stitches

with

reverse

motion

Lower

needle

stop

(general)

number

stitch

patterns

Needle

positioning

upper/lower

with

foot

pedal

LED

control

for

programmed

pattern

Permanent reverse

sewing

Manual

stitch

sizeadjustment, memorized

Pattern

start

Main

switch

Fully

automatic

buttenhole Separate

light

switch

Buttonhole

step

Speed

control

using

the

foot

control

Keyhole

buttonhole

Letters

Automatic long

stitch

Numbers

Basting

device

Characters

(- -

Balance

for

forward

and

reverse

feed Memory

capacity

units (canbe

called

even

Clear

switch

after

mains

failure/interruption)

Single

pattern

Mirror

image

1230

Description

The

electronics

the

model

1230

sewing

S-1230

control

machine

essentially located

three

large

The

complete sewing

machine

control

located

printed

circuit

boards;

the

power

L-4200,

the

S-1230

control

print.

The

S-1

230

control

control print

S-1230

and

the

display

A-1

230

located

the

A-1

230

printfrom

the

rear.

(compare

the

block

schematic

diagram).

The

most

important control

elements

are

the

tasks

the

units

correspond to

the

known microcomputer, and

the

power drive

for

the

step

functions

L-4200,

S-4200

and

A-4200 prints

motors.

new

feature

over

model

1130

that

the

from

the

model

1130.

bobbin

winder

motor

also

controlled

the

microprocessor.

The

bobbin winder

motor

speed

1-4200

powerprint

can

now

controlled

from

the

foot

control.

The

L-4200

power

mounted

above

the

The

S220

service

switch

S-1

230

isa

motor

the

rear

side

sewing

machine.

The

service

aid.

This

switch

has

two

positions:

normal

circuit

components

the

L-4200

have the

follow-

sewing

operation,

and

service

position.

the

ing

functions:

service

position,

several

buttons

and

diodes

-the

display

panel are

assigned

other functions.

-Motor

control:

This

allows

the

service

technician to

execute

The

main

motor

control

operates

with

the mains

necessary

adjustment

and

testing

functions

using

voltage.

The

main

motor

with

the

display

panel (refer to

the

special

section

pulse-width

modulated

speed

control.

The

service

programme).

The

service switch

must

closed

loop

control

circuit

on the

small

R-4200

always

set

into

the

sewing

position

for

normal

located

the

power

print.

sewing

operations.

All

circuit

components

for

the

motor

control

The

microcomputer

S-1

230

receives

operate

at dangerous

voltage

levels,

analog

signal

from

the

foot

control,

which it

then

The

safety

regulations

must

adhered to.

converts

into

digital

signal

and

transmits to

R-4200

setpoint

for

the

motor

speed.

The

Power supply:

R-4200

controls

the

motor

speed

the

Generates

the

following

D.C.

voltages:

speed

specified

the

S-print,

using

setpoint

30V

for

the

step

motors actual

value

comparison.

When

the

foot

control

for

the

logic

circuitry

the

S-1

230

and

released,

the

setpoint

goes

zero,

the

brake

A-1230

prints

actuated

from

the

microcomputer

the

S-print

for

the

sewing

light via

the

R-4200

print,

and

the

motor

rapidly

30V

for

the

bobbin winder

motor

braked.

Components

are

protected from

overload,

Signal

transfer

between

the

S-1230

and

R-4200

the

case

faults,

three

fuses

150,

151

realised

using

4-pole

cable.

Signal

and

152. If

fuse

blows

only

original

replace-

transfer

realised

through

opto-coupler

ment fuses,

with

the

correct

rating

may

used.

providing

electrical

isolation

and

thus

eliminating

dangerous

voltage

levels

from

the

foot

control

A-1230

display

and

the

S-1230

control print.

The

display

section

mounted

directly

behind

the

The

step

motors

are

random positions

when

operating

control

panel.

The

display

and

ope-

sewing

machine

switched

on.

Random

values

rating

control

elements

are

soldered

onto

the

L-

can

also

the

microcomputer control

shaped

printed

circuit.

memory.

order

have

defined

state,the

step

time

multiplex control

allows

the

numerous

motors

are

rotated

into

their

calibrated

position

LEDs

and

control

elements

connected

the

microcomputer

command, and

the

position

open

loop

control

the

S-1

230

control

value

set

zero

the

microcomputer

memory.

using

only

connection

lines.

This

starting

state

allows

the

selection

and

sewing

any

stitch

programme.

1230

Model

1230

block

schematic

L4200

F150

1230

A1230

RECTIFIER

FOOT

CONTROL

BUTTON

HOLE

SENSOR

REVERSE

SWITCH

-MAGNET

BASTING

DEVICE

POSITION

INDICATOR

WIDH

OBBINWINDER

ROTARY ENCODE

STITCH

WIGTHT

ROTAR ENCOE

ZUSERVICE

PROGRAMME

ROITAY

LENCOD

STITCH

WIDTH

STITCH

LENGTH

STEP

MOTORS

1230

Brake

P250

200

-2

E1"C4

Drive

green

2OX

Nominal

Vau

4re -L

2~ig~

me1

Sewing

light

S.L.

Step

motor

7__C_

S.B,

251

Mains

Hall-Sensor

S.L.

Housing

+5V

ll-Sensor

ain

o r

osition

-S.B.

5 o + r

Magnet

asting

device

.8 t +'=

A- O1230

A13

S-1230t"o303K+1s 0

-0 CL

200

L-L20

a13

St123

K-1130

1C4

red

Bobwiwinder

0 30

110

K-13

5 R-Button

• • • •

A-1230

Utility

stitch

display

Needle

positions

Bar

graph

stitch

width

and

switches

Presser

foot

display

Buttonhole

display

Bar

graph

stitch

length

1230

S-1230

Data

lines

A-1230

Potentiometer

for

adjusting

buttonhole

sensor

Potentiometer

for

adjusting

buttonhole

sensor

Foot

control

2-pole

black

Control

signals

from/to

L-print

4-pole

green

Buttonhole

sensors

Reverse

switch

6-pole

black

L-

Stitch

length

sensor,

3-pole

red

Stitch

width

sensor,

3-pole

black

Position

indicator

5-pole

black

Power

supply

from

L-print

5-pole

red

Magnet

basting

device,

2-pole

green

Service

switch

Pos.

Service

Pos.

Normal

Bobbin

winder

motor

4-pole

blue

Stitch

length

step

motor

4-pole

red

Stitch

width

step

motor

4-pole

black

Warning!

S-1230

has

replaced,

then

buttonhole

adjustment

and

forward/reverse

feed

equalization

must

carried

out.

1230

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