IBM B-1 Adjustment Manual

I

E T

CUSTOMER

ENGINEERING

B-1

ADJUSTMENT

MANUAL

®

ETD

CUSTOMER

ENGINEERING

8-1

ADJUSTMENT

MANUAL

all nOgk

ts

to

reproduce t

Ms

matenOal are reserved

by

IBM

TABLE

OF

CONTENTS

BACKSPACE

CARRIAGE.

CARRIAGE RETURN

ESCAPEMENT

KEYLEVERS

AND

CAMS 7

MARGIN RELEASE

MARGIN SET

MOTOR

AND

DRIVE

OPERATIONAL CAMS

PAPER

FEED.

RAILS

· 19

9

•

32

4

•

13

•

12

1

•

1'8

·

14

· 11

RIBBON

•

40

RIBBON LIFT o 43

SHIFT

SPACEBAR.

TABULATION.

• 23

• 39

.26

MOTOR AND

DRIVE

MODEL

B1

ADJUSTMENTS

1. The

ON-OFF
hesitation and have
sitions.

(Fig.

The

switch
directions
Adjust
link
link
all

the rear
for
must be

binds.

1)

requires

in

this

SWITCH

even

positive overthrow

equal

order

to

clevis

condition.

held

by

its

should function without

in

both

overthrow

insure

on

the
The switch
clamp

positive

switch opera

and

in

both

operation.

operating

be

free

po-

ting

of

2.
(Fig.
roll

POWER

2).

Make

pulley

on the

The power
making

clearance

left

to
right,
and

its

make

ROLL

the

adjustment by positioning the power

shaft,

roll

this

adjustment (Fi

will

right.

shaft
noise"

END

then

must be

allow

As

the

will

PLAY

should be

tightening

held

to

g"

the

pow

power roll

contact the

.002"

the set screws.

the

left while

3)"

Excessiv

e r

roll

to

moves

clutch

to

drift

to the

plate

.010"

e

" 0

3. The

SELF

ALIGNING
and power roll should
nate

binds.

If

a

bind

should

on

the

pulleys

should

produce

BEARINGS

be

aligned

occur

I a

with

the

satisfactory

to

their

slight

handle

of

the

motor

shafts to

tapping

of a screwdriver

resul

ts.

elimi-

action

Insufficient
heat

and

expa

clearanc

nd I ca

e w

us

ill

ing

cause

machine

bearing

to lock

to

up"

1

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, while

the

15-

tooth

pulley is

us

ed

for

the

larg

er

Pica

type

styles

or

bold

face type sty

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

ESCAPEMENT

1.

. The MAIN SPRING tension

the

loop

of

the-

carriage

the

spring drum

(Fig.

7).

tension

is

tape

adjusted by

on

various lugs

placing

of

k

Carr.

CAUTION:
tens
injury
ning s pring

Length
12"
16"

20'
24"
20"

ion

can

.'

.

tape

Use
loop

result

drum.

Extreme

extreme

from

Left

2

1/2

2

1/2

2

3/4

2

3/4

3 4

care

from s pring

fingers

Extreme

3
3
3
3

when
drum.
caught

Right

3/8

Ib

1/2

Ib

5/8

Ib

7/8

Ib

1/8

Ib

removing

Serious
by

spin-

Carriage
full

left

riage

(excluding

is

measured

should

tension

to

the

with

measure

full

air

as

should

right

cylinder

the

push

follows

be

checked

position

range).

pull

(Fig.

of

scale

8).

from

the

Tension

and

the

car-

4

2.

Adjust UNIVERSAL

the escapement pawl

g.

9)

(Fi

~

at

the same

BAR

so

that

di

stElnce

all

from

typebars

the

trip

PLATE

N

ESCAPEMENT

The

rear ,spring

ed

to

the
through
off

center
versal
universal
segment.
versal

,

right.

dition;

#42

typ

shown.

cause the

staggered

of

the

support by a Hex

an

enlarged

mounting

bar

would

bar

To

bar

is

To

adj
loosen
eba

rs

The

universal

typebars

cause uneven
were
provide

adjusted s lightly
ust

the

hex

scr

in

front

tension

universal

screw

hole

in

the

of

the

trip

adjusted

even

universal

ew I place # I,

of the

of

bar

(Fig.

square

tripping I the

type

the

universal

to

move

10).

bar

is ,mount-

(Fig.

spring.

link

on

tripping

with

forward

bar

for

guide

against

the

on

this

#22,

as

bar

'10)

The

uni-

if

the
the
uni-

the

and

springs

the

con-

Escapement Trip Lever

No.1

Typebar

The

hex
universal
screw
machine
rear
frame
checked
the

platen
remains
with the 3

l

ess

No.

22 Typebar

screw

can

with a spinner

(Fig.

uneven,

.

bar

be

with

11).

by

moving

to

typebars

is
in
reached
an 'open

insure

MODEL

then

tightened;

this

new

from
end

wrench

Tripping

typebars

even

the

proces s must

staggered

Bl

ADJUSTMENTS

, Escapement Pawl

holding

position.

the

wrench

through

should

slowly

tripping.

bottom

now

either

The

or

from

the

toward

If

be

more

repeated

Bar

the

hex

of

the

the

rear

be

tripping

or

3.

so

that

point

UNIVERSAL

BAR

the escapement pawl

in

both u'pper and lower

Reposition

the

locking

down

accessable

the

universal

tighten

by

using
lower
result

(Fig.

locking

case

in

the

screw

12).

if

bar

the

same

positions.

type

the

piling

ADJUSTING

wi

II

case.

adjusting

and

sliding

The

locking

basket

held

to

screw

after

type

or

PLATE

is

positioned

be

tripped at the same

plate

by

loosening

the

plate

up

screw

is

more

is

in

low

er

case

the

rear.

adjusting.

bar

for
Maladjustment will
chcking

both

off

Be

upp

of

typebar.

sure

Check

er

or

and

and

to

If

the

center

support
Uneven

end

typebars

typebars eith

up

or

down

tripping

trip

will

correctly

er early

until

all

cause

or

late I form

trip

type

with

the

same.

piling.

the

the

5

MODEL

Bl

ADJUSTMENTS

ESCAPEMENT

4.

Adjust

any

typeface

Early

tripping will

late

restoring

TRIP

is 3/8"

LINK

+ 1/

of

to

trip

escapement

8"

from

the

cause type

escapement

platen

piling

pawl

pawl wherl'

(Fig.

13).

due

to

spacer.

6

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

end s

""-of;"";

the keyboard.

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 leara11ces.

Be

sure

to

re-tighten

locking

screw

after

adjust-:-

ment

is

correct.

MODE L

Bl

ADJUSTMENTS

KEYLEVERS

3.

AND CAMS

Ind

ividual

keylevers,

which will not
store with the majority, are adiusted
adjusting lugs on

each

keylever.

trip

individually

and re-

by the

Individual keylevers

t

he gap
closing
(Fi

driver will
mu
vidual

the

g.

17).

st

be taken

keylevers

keyleve

between

can

be

Spreading

raise the

r .

the adjustin

done

when rai

so

are

lowered

with

the

the 1 ugs with a screw

keylever

sing

as

not

by

closing

g l

ugs. This

duck-bill pliers

(Fig . 18) .

or

lowering indi-

to

break

or bin

-

Care

d up

8.

The

KEYPLATE

of

are free

binds and

extends above it .

The

keyplate

mounting

the

front

bow

in

the

the

top

cover

vibration

should

the

top

be

cover

that

(Fig.

is

brackets

cover

center.

is

between

noted

when

is

positioned

2/ 3

to

19.)

adjusted

on

off I the

This

screwed

the

that

the

the

so

3/4

of

by

the

side

keyplate

bow

down

keyplate

keyplate

cover

that

the

keybuttons

each

keybutton .

repositioning

frames ~ With

has a slight

is

flattened

and

stops

and

cover.

positions

is

in

place.

its

as

any

It

8

CARRIAGE

1.

Adjust the

eliminate

verticle

PLATEN
movement

lATCH ECCENTRICS to just

of

the

platen.

(Fig.

20.)

MODEL

B1

ADJUSTMENTS

Loosen

attempting
w
writing
too

locking

ill

allow the platen

line.

tight.

nut

to

adjust· it.

Latches

on the

ecce

ntric before

Excessive clearance

to

mov e I

will

giving

work

hard

unev

if

adjusted

en

2.

Adjust

PLATEN

front to back movement

Some

machines will have locking scr

and

eccentrics;

With

both

types I lo
and
snug

adjust.

but eas

Correct

ily

CONTROL YOKES to remove

of

Platen.

others

osen the locking scr

re mov

(Fig.

21.)

only loc

adjustment ins

able platen.

kin

g s

ures

ews

crews.

ews

a

3.

Position

the

platen

adjusting

The
ward.

the

guide shaft

plates.

multiple

(Fig.

PLATEN

eccentrics

22.)

copy

control

RETAINING

tightly

lever

PLATES

to hold

against the platen

must

be

for-

9

MODEL

Bl

ADJUSTMENTS

CARRIAGE

4.

Adjust RING AND
carriage
ing

and

eccentrics

CYLINDER

by

moving inner

platen front to rear with the ,platen adiu!;t-

(Fig. 23).

There
paper
the

proper

Check
plat

en

change

Be

fore

loosen

(Fig.

25)

screws.

should
as

be a slight

it

is

removed

position

this

adjustment

to

insure

across

the

adjusting

the

feed roll center

and

both

ring

the

rear

when

(Fig.

at

and

platen.

platen

platen

drag

on

the

24).

both

cylinder

adjusting

support

retaining

the

platen

ends

strip

of

will

eccentrics

screws

is

the
not

plate

of
in

I

Check

sheet
ribbon
in
a
the

I

RING AND CYLINDER

of

bond

paper

in

operating

lower

case

position

strip

of

bond

paper

ribbon

and

the

in

the

position.

against

used

sheet

with a single

machine I and

Hold a typebar

the

as a guage

of

bond

paper.

ring

the

with

between

10

5.

the

Adjust

eccentric

The

center

any

change
justment.
be

necessary
support
support.

Correct
relation
multiple

FEED

ROLL

CENTER

collar

on the platen guide shaft. (Fig.

supports

in

carriage

On

long

carriage

to

loosen

before

support

between

copy

adjusting

adjustment

platen

control

must

ring

is

SUPPORT

be

and

machines I it

the

margin

the

insures

and

feed

adjusted.

to just touch

readjusted

cylinder

rack

feed

roll

the

rolls

25.)

after

ad-

will

center

center

proper

as

the

RAILS

10

The FRONT

RAI L is
ward position and locked
ing

screw.

The

front

and

maintains

the

carriage

rail

is

position

(Fig.

not

during

26.)

rail

is

the

and

adjustable

all

positioned

in

position with

mounted

correct

the

type

and

rail

in

the

the

to

the

power

relationship

basket.

should

adjustments.

full

rai I

The

remain

for-

clamp-

frame

between

front

in

2.

Adjust the
remove front to
riage

is

centered

RAI L SUPPORT

rear

movement

on

the

rails for the

MODEL

Bl

ADJUSTMENTS

ECCENTRICS to just

of

the

carriage.

adjustment.

The

(Fig.

car-

27.)

3.

just

Adjust

eliminate

The

carriage

the

right

adjusting

The

rear

all

front

the

carriage

too

tight,

flat

spots,

and

the

the

rails

front

to
writing
remove
With

the
glide

smoothly

motion.

the

REAR

RAIL

ADJUSTING

front to rear motion

must

be

full

adjusting

the

rail
to

back

in

the

the

carriage

are

back
line.
both

carriage

tapes

left

adjusting

is

to

motion

any

carriage

rails

will

loose,

causing

When

removed,

with

screw I and

be

adjusted·.to

position.

will

bind

the

uneven

adjusting

return

no

of

right

of

the

rollers

wear

or

carriage

the

binds

SCREWS

the

carriage.

when

full

screw.

just

carriage
With
will

more

be

sluggish.

will

impression

the

rear

and

tension

carriage

or

front

(Fig.

adjusting

left

when

remove

with

the

rails

develop

rapidly,

move

rail,

tape.

should

to

rear

to

and

If

28.)

Before
loosen
back

28).
port

adjusting

both

off

the

If

this

eccentrics

rear

rear
is

the
rail

rail

not

will

rail

clamping

adjusting

done,

bow

support

screws

adjusting

the

rails.

eccentrics,

and

screws

the

(Fig.

sup-

11

MODEL

The
by
necessary
contact
erated.
compensates
and
form
adjustment.
the
set
adjusted
set
hairpin
lever

Bl

ADJUSTMENTS

margin

the

stop

margin

to

the

right

This s light

the

margin

the

margin

mounting
lever

mounting s'crew

to

remove

lever

without

spring

(Fig.

29).

is

control

adjust

side

for

the

will

set
Move
screws

binding

must

spring

lever.

the

of

off

center

tension

set

accurately.

lever

the

bracket

(Ficj.

all

side

reliably

loaded

margin

the

notch

of

when

30).

and

movement

the

restore

to

the

Therefore,

set

lever

as

adjustment

the

margin

Do
making
after

loosening

The

margin

lock

nut

set

lever.

the

left

it

this

must

of

set

it

to

is

not

the
The

is

op-

stop

be

MARGIN

1.

lever

enters

resting

at

SET

Adjust

the

the

the

MARGIN

notch

in

left margin

SET

BRACKET

so

the margin stop with

(Fig.

29).

that

the

the

set

carriage

12

2.

Adjust

the

MARGIN

set lever just

clears

the

margin rack with

keybutton fully depressed •

.

If

the

margin

not

reliably

m~rgin

too

low,

as

the

set

tween

the

rack.

it

set

release

If

the

will

not

lever

margins.

SET

lever

the
margin

cam

is

incorrectly

LINK

is

set

margin

set

over'the

so

thatthe

the

too

high
stop
lever

margin

operated

margin

margin set

I

it

will

from

the

is

set

stop

be-