IBM B-1 Leitfaden

E T

CUSTOMER

ENGINEERING

B-1

ADJUSTMENT

MANUAL

ETD

CUSTOMER

ENGINEERING

8-1

ADJUSTMENT

MANUAL

all

Ogk

reproduce t

matenOal are reserved

IBM

TABLE

CONTENTS

BACKSPACE · 19

CARRIAGE.

CARRIAGE RETURN •

ESCAPEMENT 4

KEYLEVERS

AND

CAMS 7

MARGIN RELEASE •

MARGIN SET •

MOTOR

AND

DRIVE 1

OPERATIONAL CAMS •

1'8

PAPER

FEED.

RAILS

· 11

RIBBON •

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

both

po-

sitions.

(Fig.

The

switch

requires

equal

overthrow

both

directions

order

insure

positive

operation.

Adjust

the

ear

clevis

the

switch

era

ting

link

for

this

condition.

switch

operating

link

mus

held

its

clamp

and

free

all

binds.

" 0

3. The

SELF

ALIGNING

BEARINGS

the

motor

and power roll should

aligned

their

shafts to

elimi-

nate

binds.

bind

should

occur

I a

slight

tapping

action

the

pulleys

with

the

handle

screwdriver

should

produce

satisfactory

resul

ts.

MODEL

ADJUSTMENTS

POWER

ROLL

END

PLAY

should be

.002"

.010"

(Fig.

2).

Make

the

adjustment by positioning the power

roll

pulley

on the

shaft,

then

tightening

the set screws.

power

roll

mus

held

the

left

hile

making

this

adjus

men

(Fi

3)"

Excessiv

clearance

will

allow

the

pow

e r

roll

drift

right.

the

power

moves

right,

its

shaft

will

contact

clutch

plate

and

make

noise"

Insufficient

clearanc

e w

ill

cause

bearing

heat

and

expa

ing

machine

up"

MODEL

ADJUSTMENTS

POWER

ROLL

SPEED

adjusted

two-step

motor

Iley o The motor

pulley

shou

be positioned on

the motor shaft to

align

the belts

~nd

the

pulleys (Fig.

5).

14-tooth

pulley

generally

used

for

the

Elite

pitch

type

styles,

hile

the

15-

tooth

pulle

for

the

larg

Pica

type

les

bold

fac

type

les.

MOTOR AND

DRIVE

Adjust the

DRIVEN

BELT

by positioning the

inter

mediate

pulley

shaft.

The shaft incorporates a

left-hand

thread

that

pulley

rotation tends

ti ghten the

shaft.

The

deflection

the belt should

approximately 3/

(Fig.

4).

60 Adjust

the

DRIVE

BELT

for approximately 3/ 16"

deflection

by positioning the motor adiusting screw for-

ward or back

its

elongated

mounting hole

(Fig.

4).

adjust

the

drive

belt

tension

ring

mount-

motors,

loosen

the

motor

adjusting

screw

and

the

ring

mount

bracket

screw

(Fig

6).

The

motor

may

then

moved

front

rear

for

pro-

per

belt

tension.

After

tightening

these

screws,

check

the

motor

housing

sure

paral-

lel

the

frame

and

that

the

ring

mount

screws

are

tight.

adjust

the

drive

belt

tension

the

shaft

mounted

motor

necessary

only

loosen

the

motor

adjusting

screws.

MOTOR

AND

DRIVE

The

following

are

the

effects

loose

tight

belts:

LOOSE BELTS

Belt

noise

Belt

climbing

pulley

Uneven

impression

(due

momentary

slowing

the

power

roll

after

shift

backspace

operation).

falling

off

when

machine

moved

TIGHT BELTS

Belt

noise

Motor

vibration

transmitted

machine

Failure

motor

start

(extremely

tight

belts)

Properly

adjusted

belts

should

run

quietly,

bounce

only

slightly

during

shift

operation,

and

allow

the

drive

mechanism

coast

smooth

stop

the

switch

turned

off.

MODEL

ADJUSTMENTS

MODEL

ADJUSTMENTS

Carr.

Length

Extreme

Left

Extreme

Right

12"

1/2

3/8

16"

1/2

20'

.' 2

3/4

5/8

24"

3/4

7/8

20"

. 3 4

1/8

CAUTION:

Use

extreme

care

when

removing

tens

ion

tape

loop

from

pring

drum.

Serious

injury

can

result

from

fingers

caught

spin-

ning

pring

drum.

ESCAPEMENT

. The MAIN SPRING tension

adjusted by

placing

the

loop

the-

carriage

tension

tape

various lugs

the

spring drum

(Fig.

7).

Carriage

tension

should

checked

from

the

full

left

the

full

right

position

the

car-

riage

(excluding

air

cylinder

range).

Tension

measured

with

the

push

pull

scale

and

should

measure

follows

(Fig.

8).

Adjust UNIVERSAL

BAR

that

all

typebars

trip

the escapement pawl

the same

stElnce

from

the

PLATE

(Fi

ESCAPEMENT

The

rear

spring

the

universal

bar

mount-

the

suppor

Hex

screw

(Fig.

'10)

through

enlarged

hole

the

spring.

The

off

center

mounting

the

trip

link

the

uni-

versal

bar

would

cause

even

tripping

the

universal

bar

were

adjusted

square

with

the

segment.

provide

even

tripping

the

uni-

versal

bar

adjusted

lightly

forward

the

right.

adj

ust

the

universal

bar

for

this

con-

dition;

loosen

hex

scr

place

#22,

and

#42

typ

eba

front

type

guide

sho

The

tension

the

universal

bar

springs

cause

universal

bar

move

against

the

staggered

typ

bars

(Fig.

10).

UNIVERSAL

BAR

ADJUSTING

PLATE

positioned

that

the escapement pawl

tripped at the same

point

both u'pper and lower

case.

Reposition

the

adjusting

plate

loos

ning

the

locking

screw

and

sliding

the

plate

down

(Fig.

12).

The

locking

screw

accessable

the

basket

low

case

and

the

universal

bar

held

the

rear.

sure

tighten

locking

screw

after

adjusting.

Check

using

the

same

type

bar

for

both

upp

and

lower

case

positions.

Maladjustment

ill

result

type

piling

chcking

off

typebar.

Escapement Trip Lever MODEL

ADJUSTMENTS

, Escapement Pawl

Bar

No.1

Typebar

No.

22 Typebar

The

hex

screw

then

tightened;

holding

the

universal

bar

this

new

position.

The

hex

screw

can

reached

from

the

bottom

the

machine

with

open

end

wrench

from

the

rear

with

spinner

wrench

through

the

rear

frame

(Fig.

11).

Tripping

should

now

checked

moving

typebars

slowly

toward

the

platen

insure

even

tripping.

tripping

remains

uneven,

the

proces

must

repeated

with

e 3

typebars

staggered

either

ess

the

end

typebars

trip

correctly

with

the

center

typebars

ith

rly

late

form

the

support

down

until

all

trip

the

same.

Uneven

tripping

will

cause

type

piling.

MODEL

ADJUSTMENTS

ESCAPEMENT

Adjust

TRIP

LINK

trip

escapement

pawl wherl'

any

typeface

+ 1/

from

the

platen

(Fig.

13).

Early

tripping

cause

ype

piling

due

late

restoring

escapement

pawl

spacer.

KEYLEVERS

AND

CAMS

Cam

clearance

adjusted

for

.015"

.020"

clearance

between

the

nylon

letter

cams

and

power

roll.

Adjust

loosening

the

upper

screws

the

cam

lever

bearing

support

and

pivoting

the

support

its

pivot

screws

(Fig.

14).

Adjust

the

KEYLEVE,R

ARINGSUPPORT

down

that

the

keylevers

will

trip

their

respective

cams

when

the

keylevers

are

1/32

1/64"

from

the

bottom

the

keylever

guide

comb.

Adjust

loosening

either

both

front

both

rear

bearing

support

mounting

screws

slightly.

*Tap

the

loose

screw

the

support,

down

with

screwdriver

and

hammer.

This

method

allows

the

slight

change

which

ne-

ces

sary.

* (Do

not

loosen

both

screws

either

end,

this

will

allow

the

support

lose

all

adjustment).

Check

for

proper

tripping

with

several

keylevers

both

en d s

""-

;"";

the

yboard.

If,

with

correct

tripping,

some

trip

levers

not

restore,

check

adjustment

above.

MODEL

ADJUSTMENTS

Check

the

adjustment

using

tab

cards

(.007"

thick

guage.

Three

cards

021")

tight,

two

cards

(.014)

loose

(Fig.

IS).

Cam

clear-

ance

must

equal

across

all

cams

order

have

uniform

impression

and

keyboard

touch.

Excessive

clearance

will

cause

failure

cams

engage

power

roll

keylever

bottoms,

failure

trip

lever

restore

key

lever

re-

stores.

Insufficient

clearance

will

cause

weak

impression

and

repeating

cams.

CAUTION: Any

change

cam

bearing

sup-

port

will

affect

functional

cam

leara1

ces.

sure

re-tighten

locking

screw

after

adjust-:-

ment

correct.

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