Ibm B-1 Guide

I

E T

CUSTOMER

ENGINEERING

B-1

ADJUSTMENT

MANUAL

®

ETD

CUSTOMER

ENGINEERING

8-1

ADJUSTMENT

MANUAL

all

n

Ogk

ts

to

reproduce t

Ms

matenOal are reserved

by

IBM

TABLE

OF

CONTENTS

BACKSPACE · 19

CARRIAGE.

9

CARRIAGE RETURN •

32

ESCAPEMENT 4

KEYLEVERS

AND

CAMS 7

MARGIN RELEASE •

13

MARGIN SET •

12

MOTOR

AND

DRIVE 1

OPERATIONAL CAMS •

1'8

PAPER

FEED.

·

14

RAILS

· 11

RIBBON •

40

RIBBON LIFT o 43

SHIFT

• 23

SPACEBAR.

• 39

TABULATION.

.26

MOTOR AND

DRIVE

1. The

ON-OFF

SWITCH

should function without

hesitation and have

even

positive overthrow

in

both

po-

sitions.

(Fig.

1)

The

switch

requires

equal

overthrow

in

both

directions

in

order

to

insure

positive

operation.

Adjust

the

r

ear

clevis

on

the

switch

op

era

ting

link

for

this

condition.

Th

e

switch

operating

link

mus

t

be

held

by

its

clamp

and

be

free

of

all

binds.

" 0

3. The

SELF

ALIGNING

BEARINGS

of

the

motor

and power roll should

be

aligned

to

their

shafts to

elimi-

nate

binds.

If

a

bind

should

occur

I a

slight

tapping

action

on

the

pulleys

with

the

handle

of

a

screwdriver

should

produce

satisfactory

resul

ts.

1

MODEL

B1

ADJUSTMENTS

2.

POWER

ROLL

END

PLAY

should be

.002"

to

.010"

(Fig.

2).

Make

the

adjustment by positioning the power

roll

pulley

on the

shaft,

then

tightening

the set screws.

Th

e

power

roll

mus

t

be

held

to

the

left

w

hile

making

this

adjus

t

men

t

(Fi

g"

3)"

Excessiv

e

clearance

will

allow

the

pow

e r

roll

to

drift

l

ef

t

to

right.

As

the

power

ro

ll

moves

to

th

e

right,

its

shaft

will

contact

th

e

clutch

plate

and

make

noise"

Insufficient

clearanc

e w

ill

cause

bearing

to

heat

and

expa

nd

I

ca

us

ing

machine

to

lo

ck

up"

MODEL

B1

ADJUSTMENTS

5.

POWER

ROLL

SPEED

is

adjusted

by

a

two-step

motor

pu

Iley o The motor

pulley

shou

Id

be positioned on

the motor shaft to

align

the belts

~nd

the

pulleys (Fig.

5).

A

14-tooth

pulley

is

generally

used

for

the

Elite

or

12

pitch

type

styles,

w

hile

the

15-

tooth

pulle

y

is

us

ed

for

the

larg

er

Pica

type

st

y

les

or

bold

fac

e

type

st

y

les.

'

2

MOTOR AND

DRIVE

40

Adjust the

DRIVEN

BELT

by positioning the

inter

-

mediate

pulley

shaft.

The shaft incorporates a

left-hand

thread

so

that

pulley

rotation tends

to

ti ghten the

shaft.

The

deflection

of

the belt should

be

approximately 3/

8"

(Fig.

4).

60 Adjust

the

DRIVE

BELT

for approximately 3/ 16"

deflection

by positioning the motor adiusting screw for-

ward or back

in

its

elongated

mounting hole

(Fig.

4).

To

adjust

the

drive

belt

tension

on

ring

mount-

ed

motors,

loosen

the

motor

adjusting

screw

and

the

ring

mount

bracket

screw

(Fig

~

6).

The

motor

may

then

be

moved

front

to

rear

for

pro-

per

belt

tension.

After

tightening

these

screws,

check

the

motor

housing

to

be

sure

it

is

paral-

lel

to

the

frame

and

that

the

ring

mount

screws

are

tight.

To

adjust

the

drive

belt

tension

on

the

shaft

mounted

motor

I

it

is

necessary

only

to

loosen

the

motor

adjusting

screws.

MOTOR

AND

DRIVE

The

following

are

the

effects

of

loose

or

tight

belts:

LOOSE BELTS

1.

Belt

noise

2.

Belt

climbing

on

pulley

3.

Uneven

impression

(due

to

momentary

slowing

of

the

power

roll

after

shift

or

backspace

operation).

4.

Be

lt

falling

off

when

machine

is

moved

TIGHT BELTS

1.

Belt

noise

2.

Motor

vibration

transmitted

to

machine

3.

Failure

of

motor

to

start

(extremely

tight

belts)

.

Properly

adjusted

belts

should

run

quietly,

bounce

only

slightly

during

a

shift

operation,

and

allow

the

drive

-

mechanism

to

coast

to

a

smooth

stop

as

the

switch

is

turned

off.

MODEL

Bl

ADJUSTMENTS

3

MODEL

B1

ADJUSTMENTS

Carr.

Length

Extreme

Left

Extreme

Right

12"

2

1/2

3

3/8

Ib

16"

2

1/2

3

1/2

Ib

20'

.' 2

3/4

3

5/8

Ib

24"

2

3/4

3

7/8

Ib

20"

. 3 4

1/8

Ib

CAUTION:

Use

extreme

care

when

removing

tens

ion

tape

loop

from

s

pring

drum.

Serious

injury

can

result

from

fingers

caught

by

spin-

ning

s

pring

drum.

4

ESCAPEMENT

1.

. The MAIN SPRING tension

is

adjusted by

placing

k

the

loop

of

the-

carriage

tension

tape

on

various lugs

of

the

spring drum

(Fig.

7).

Carriage

tension

should

be

checked

from

the

full

left

to

the

full

right

position

of

the

car-

riage

(excluding

air

cylinder

range).

Tension

is

measured

with

the

push

pull

scale

and

should

measure

as

follows

(Fig.

8).

2.

Adjust UNIVERSAL

BAR

so

that

all

typebars

trip

the escapement pawl

at

the same

di

stElnce

from

the

PLATE

N

(Fi

g.

9)

~

ESCAPEMENT

The

rear

,

spring

of

the

universal

bar

is

,

mount-

ed

to

the

suppor

t

by

a

Hex

screw

(Fig.

'10)

through

an

enlarged

hole

in

the

spring.

The

off

center

mounting

of

the

trip

link

on

the

uni-

versal

bar

would

cause

un

even

tripping

if

the

universal

bar

were

adjusted

square

with

the

segment.

To

provide

even

tripping

I

the

uni-

versal

bar

is

adjusted

s

lightly

forward

on

the

,

right.

To

adj

ust

the

universal

bar

for

this

con-

dition;

loosen

hex

scr

ew

I

place

#

I,

#22,

and

#42

typ

eba

rs

in

front

of

th

e

type

guide

as

sho

w

n.

The

tension

of

the

universal

bar

springs

cause

th

e

universal

bar

to

move

against

the

staggered

typ

e

bars

(Fig.

10).

3.

UNIVERSAL

BAR

ADJUSTING

PLATE

is

positioned

so

that

the escapement pawl

wi

II

be

tripped at the same

point

in

both u'pper and lower

case.

Reposition

the

adjusting

plate

by

loos

e

ning

the

locking

screw

and

sliding

the

plate

up

or

down

(Fig.

12).

The

locking

screw

is

more

accessable

if

the

basket

is

in

low

er

case

and

the

universal

bar

held

to

the

rear.

Be

sure

to

tighten

locking

screw

after

adjusting.

Check

by

using

the

same

type

bar

for

both

upp

er

and

lower

case

positions.

Maladjustment

w

ill

result

in

type

piling

or

chcking

off

of

typebar.

Escapement Trip Lever MODEL

Bl

ADJUSTMENTS

5

, Escapement Pawl

Bar

No.1

Typebar

No.

22 Typebar

The

hex

screw

is

then

tightened;

holding

the

universal

bar

in

this

new

position.

The

hex

screw

can

be

reached

from

the

bottom

of

the

machine

with

an

'

open

end

wrench

or

from

the

rear

with

a

spinner

wrench

through

the

rear

frame

(Fig.

11).

Tripping

should

now

be

checked

by

moving

typebars

slowly

toward

the

platen

to

insure

even

tripping.

If

tripping

remains

uneven,

the

proces

s

must

be

repeated

with

th

e 3

typebars

staggered

either

more

or

l

ess

.

If

the

end

typebars

trip

correctly

with

the

center

typebars

e

ith

er

ea

rly

or

late

I

form

the

support

up

or

down

until

all

trip

the

same.

Uneven

tripping

will

cause

type

piling.

MODEL

Bl

ADJUSTMENTS

6

ESCAPEMENT

4.

Adjust

TRIP

LINK

to

trip

escapement

pawl wherl'

any

typeface

is

3/

8"

+ 1/

8"

from

the

platen

(Fig.

13).

Early

tripping

wi

ll

cause

t

ype

piling

due

to

late

restoring

of

escapement

pawl

spacer.

KEYLEVERS

AND

CAMS

1.

Cam

clearance

is

adjusted

for

.015"

to

.020"

clearance

between

the

nylon

letter

cams

and

power

roll.

Adjust

by

loosening

the

upper

screws

on

the

cam

lever

bearing

support

and

pivoting

the

support

on

its

pivot

screws

(Fig.

14).

2.

Adjust

the

KEYLEVE,R

BE

-

ARINGSUPPORT

up

or

.

down

so

that

the

keylevers

will

,

trip

their

respective

cams

when

the

keylevers

are

1/32

11

+

1/64"

from

the

bottom

of

the

keylever

guide

comb.

Adjust

by

loosening

either

both

front

or

both

rear

bearing

support

mounting

screws

slightly.

*Tap

the

loose

screw

or

the

support,

up

or

down

with

a

screwdriver

and

hammer.

This

method

allows

the

slight

change

which

is

ne-

ces

sary.

* (Do

not

loosen

both

screws

on

either

end,

as

this

will

allow

the

support

to

lose

all

adjustment).

Check

for

proper

tripping

with

several

keylevers

at

both

en d s

""-

of

;"";

the

ke

yboard.

If,

with

correct

tripping,

some

trip

levers

do

not

restore,

check

adjustment

#1

above.

7

MODEL

B1

ADJUSTMENTS

Check

the

adjustment

by

using

tab

cards

(.007"

thick

as

a

guage.

Three

cards

(.

021")

tight,

two

cards

(.014)

loose

(Fig.

IS).

Cam

clear-

ance

must

be

equal

across

all

cams

in

order

to

have

uniform

impression

and

keyboard

touch.

Excessive

clearance

will

cause

failure

of

cams

to

engage

power

roll

as

keylever

bottoms,

or

failure

of

trip

lever

to

restore

as

key

lever

re-

stores.

Insufficient

clearance

will

cause

weak

impression

and

repeating

cams.

CAUTION: Any

change

in

cam

bearing

sup-

port

will

affect

functional

cam

c

leara1

1

ces.

Be

sure

to

re-tighten

locking

screw

after

adjust-:-

ment

is

correct.

IBM B-1 Guide

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