IBM 552 User manual

IBM CUSTOMER ENGINEERING
REFERENCE
MANUAL
PREVENTIVE Alp habetical 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 asso-
ciated 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.
III. 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 GeneralSection-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 GeneralSection)
(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 move-
ment.

(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 GeneralSection)
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
thecard before
CB 5and 6 havebroken thecircuit for thepreviousimpulse,
may result in tripping the magnets early causing printing under. With
a worn brush making contact too long, or
if CB4, 5and 6 aremaking 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.
Toovercome 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
_ _ _ __ -- -_ _____ --__- - _____--_- _ _ _ _ _
Make Break
30" 36"
60" 66"
354" 360"
2. Relays (see GeneralSection)
3. Motors and en era tors (see GeneralSection)
4. Bijur System (see GeneralSection)
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 tobe sure all positions have printed correctly;
then run the samedeck 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.