IBM
CUSTOMER ENGINEERING
REFERENCE
MANUAL
PREVENTIVE
Alp
ha betical Interpreter
MAINTENANCE
Type
552
CONTENTS
Page
..................
CAM AND DRIVE SHAFTS
2
FEED
UNIT
..........................
2
PRINT UNIT.
..........................
3
BASE
..............................
4
TESTS
.............................
5
Copyright
1949
INTERNATIONAL BUSINESS MACHINES CORPORATION
New
York,
New York
Printed in U.S.A.
Form
22-5749-2
PREVENTIVE
MAINTENANCE
Alphabetical Interpreter,
Type
552
General
Machine should be given a general cleaning before the actual inspection is
begun. Brush out card dust and wipe up any excess grease and oil from the
base
and the various parts. Check conditions of ribbon at this time. If ribbon
replacement is necessary, remove and wipe ink from ribbon shield and associated parts.
A
better, more efficient inspection can be performed on a clean
machine.
CAM
AND
DRIVE
SHAFTS
I.
Cleaning
All dirt and old grease should be cleaned from cams and cam followers.
11.
lnspection
1.
Cam Followers
for loose studs.
2.
Cams
for loose pins.
3.
Contact
Drum
brake and ratchet assembly for freedom of action.
I II. Lubrication
IBM
9
(1)
Reverse friction lock, particularly at point where steel shoulder
of
drive pulley operates against the reverse friction lock arm.
IBM
77
(1)
Light film on all linen dilecto gears.
(2)
All gears and cam surfaces not lubricated by Bijur System.
IBM
27
(1)
Zerk fitting in drive pulley.
FEED
UNIT
I. Cleaning
See General
Section
under headings listed below.
II. lnspection
1.
Hopper
and
Feed Rolls
(see General Section-Horizontal Feeds)
(a) CLEANING
(b)
FEED
KNIFE ADJUSTMENTS
(c)
FEED KNIFE GUIDE SLIDES
(d) EVEN FEEDING OF CARDS
(e) HOPPER SIDE PLATES
(f) ROLLER THROAT
(g) FEED ROLL TENSION
(h) CONTACT ROLL CARD GRIPPERS for good spring tension.
(i) FEED KNIFE TIMING
(j)
HOPPER POSTS
2.
Brush Assemblies
(see General Section)
(a) CLEANING.
It
is essential to keep the contact roll absolutely free of
all particles of dirt or other foreign matter, not only to insure good
electrical contact but also to insure clear printing impressions
on the card. Removing the card guide between the contact roll and
the hopper will simplify the cleaning.
(b) BRUSH SEPARATORS. Revolve the rolls and watch for brush
---
-
movement. Any dirt between the separators will result in brush movement.
(c) BRUSHES
(d) BRUSH ALIGNMENT TO SCRIBED LINE. Use gauge
#450388
.
.
and line nearest bend in gauge.
(e) BRUSHES EVENLY SPACED BETWEEN SEPARATORS.
Special care should be taken that all dirt
is
cleaned from between the
segments of the feed roll separator. The grooved dilecto roll is ad-
justed horizontally by means of the brush roll locating
collar so that
the brushes are in the center of the grooves. Use the brush bending
tool on individual brushes. Revolve the roll to make sure brushes are
free all the way around.
(f)
BRUSH TRACKING. Change by shimming the brush assembly
holding brackets located on the side castings.
(g)
BRUSH
TIMING. The brushes are timed to the holes in the card
so they will make at least
11/20
before every selecting impulse, and
break not earlier than
11/~"
after each selecting impulse breaks. The
make and break timing
af the brushes should be checked for each
selecting and zoning impulse. The correct timing is obtained by
loosening the holder clamping screws and moving the holder left or
right in the assembly.
Make sure that the clamping screws are
tightened after the correct timing is obtained. The brushes should
never have a duration of longer than
2"
before and after the make
and break of the selection circuit breakers, or
a
total of
7"
duration
at selection time.
See information on
"CB's" under
Base
for this
machine.
3.
Stacker
(a)
STACKER ROLLS for freedom of operation and wear.
(b)
JAM
CONTACT for adjustment and timing.
4.
Card
Levers
(see General Section)
Ill.
Lubrication
IBM
6
(1) Roller throat.
(2) Card lever pivot points.
IBM
9
(1) Feed knife guide slides.
(2) Feed knife guide pin.
(3)
Brush separator roll bearings.
(4)
Card stacker shaft assembly pivots.
(5) Bell crank assembly pivot.
ISM
77
(1)
Card levers-very light film between operating iever and phenolic
pad
on contact strap.
(2) Both ends of bell crank assembly.
PRINT
UNIT
I.
Cleaning
Type bars should be cleaned of all dirt and old ink. The face on the type
tails should
be
cleaned with a stiff brush taking care to clean out all accumu-
lated material from the center of the letters. An alternate cleaning method
would
be
to use plastic type cleaner, part
450528.
II.
Inspection
1.
Type
Unit.
Before removing type unit from machine, operate the machine
manually under power without cards and observe the operation of the
type bars. They
may
best be viewed from the left end of the machine
under the magnet unit. Check the releasing time and the restoring of the
bars. Any bars in which the friction slide spring tension is insufficient will
have a tendency to fall down during the restoring part of the cycle. Note
the number of any bars not operating correctly and correct when unit is
removed.
4
PREVENTIVE
MAINTENANCE
-
CUSTOMER
ENGINEERING
--
With unit removed:
(a) TYPE BARS for bent or broken type tails, broken type tail springs
and freedom of operation of type bars in their
guides.
(b) PRINTING PRESSURE
BAR
ASSEMBLY
Ifor wear.
2.
Magnet
Unit.Check with unit removed from machine.
(a) DRIVE ROD BAIL for freedom of movement.
(b) ARMATURES for wear at point where drive rod lever contacts it.
(c) TERMINAL WIRES for loose or broken connections.
(d) RIBBON FEED ASSEMBLY for wear and freedom of operation.
I
II.
Lubrication
(1) Print magnet armature pivot point.
(2)
Type bar stop pawls.
IBM
9
(1) Ribbon feeding mechanism.
(1) Magnet armatures at point where drive rod levers rest.
(2) Internal cuts in zoning pawl restoring lever cams.
(3) Top of magnet unit restoring levers where they
fit
into slot
in
sides of
magnet unit.
(4)
Zone carrier lever arms at end that fit into type unit.
(5) Type bar friction springs.
(1)
Cam rollers for magnet restoring cam.
(2) Cam roller on zoning carrier lever.
(3) Drive shaft end bearing behind linen dilecto gear.
BASE
1.
CB
Cams
and
Contacts
(see
General
Section)
When the brushes are worn to the extent that the duration of contact
through the hole in the card is increased, difficulty may be experienced
both with the brushes making too early and too late. Wear of the CB
cams, contacts and cam followers resulting in longer impulses, aggravates
this condition. A worn brush, making contact early through a hole in
the card before
CB
5 and 6 have broken the circuit for the previous impulse,
may result in tripping the magnets early causing printing under. With
a worn brush making contact too long, or
if
CB 4, 5 and 6 are making early,
it is possible for a zero hole to make contact for a one impulse and the
type bar will be stopped by the zero-one position which is normally blank.
To overcome these conditions, the timing below should be adhered to:
CB 5 makes at
108O for a one impulse, CB 6 breaks three degrees later
at
111". As further check, CB 5 should make at 153" and CB 6 should
break at
156" for a 7 impulse.
CB
4 should not make earlier than 107".
Occasionally a brush will drop into the zero hole in the card, while the
zone make cam CB 2, due to its long duration, is closed for an
X
and if
the brush overlaps the CB by as little as
1" the discharge of the
2MFD
condenser may operate the print magnet. Such an impulse will start the
type bar moving much sooner than it should, and it may be deposited on
the
X
bail.
To overcome this condition the zone cams CB
2
and 3 are now cut for a
shorter duration. These cams, Part
#160759, are available for installation
and should be ordered on MES Group
11
to eliminate difficulties of this
nature.
The theoretical timing of CB
2
and CB 3 with this shorter duration is
shown on wiring diagram
#I61
561-K reading as follows:
REFERENCE
MANUAL
TYPE
552
5
_ _ _
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-_
_____
--__-
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_____--_-
_
_
_
_
_
Make Break
30" 36"
60"
66"
354" 360"
2.
Relays
(see General Section)
3.
Motors
and
en era tors
(see General Section)
4.
Bijur
System
(see General Section)
5.
Control Panel
(see General Section)
TESTS
MOST CUSTOMERS have a 513
control panel wired for
80-80
reproducing.
This may be inserted
in the
552
and used for the first three tests below, if a
test deck blank
in columns
21
through
40
is used. Check the printing after
running a test deck through once to be sure all positions have printed correctly;
then run the same deck through several
times and check to see that the printing
has been the same every
time.
1.
Check a test deck punched with numeric information in all positions.
2.
Check alphabetical interpretations with the same control panel using
cards punched
with the alphabetical characters in sequence in all columns
of the card.
3.
Punch a card with zeros in all columns. Check printing results. For
further
checking, punch an individual card in all columns for each digit
and letter. Check results.
4.
Check X elimination device operation.
5.
Check zero elimination device (optional feature).
6.
Check quality of all printing for clearness and legibility.
7.
Check to see that cards are not embossed.
8.
Stand by and check the customer's work as it comes off machine to insure
against trouble being left which the above tests did not show. Also, it is
possible to place trouble on machines when covers are installed.
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