IBM 01 Maintenance Manual page 101

MODEL AI
CUSTOMER ENGINEERING
FINGER P·RINTS
on any typing materials can contribute
to spotty, uneven impression.
PAPER, RIBBONS AND CARBON PAPER
should be exa-
mined with a view to improving impression. (Refer to
Typing Materials section, IBM Electric Typewriters
Manual of Instruction.)
TYPE FACES
that cut the original, when certain brands
of paper are used, will sometimes dictate a lower impres-
sion setting than is safe and this will result in uneven
impression. If no relief can be secured through selection
of material, platen, adjustments, etc., the particular type
faces that cut must be polished to prevent their cutting.
POLISHING TYPE FACES
can aid greatly in overcoming
type cutting and will often produce a uniformity of im-
pression not otherwise possible. Care must be exercised
to avoid broadening the type face too much.
1.
Be certain that all type alignment adjustments have
been checked.
2. Place an original and two carbon copies in the type-
writer.
3. Set the impression indicator so the lower case period
and comma print satisfactorily.
4. Strike up a sample of the keyboard in numerical
order starting with No. 1 position.
qa2zws3x---etc.
QA@ZWS#X---etc.
5. Remove the paper, place the typewriter on its back
and study the original sheet. Turn out any impres-
sion screws for light-striking type faces and turn in
the screws for cutting or heavy impressions.
6. Re-strike the characters that have been altered and
select any type that cannot be made strong enough
to print a strong, firm impression without cutting
the paper. These type faces are recommended for
polishing.
7. Put the color control in stencil position and wrap a
sheet of Behr-Manning Durite 600A abrasive paper
around the platen. Hold the type bar firmly against
the abrasive, applying pressure to the type bar where
it contacts the ring and polish the type by moving
the carriage to left and right once or twice and also
by rotating the platen up and down once or twice.
All movements of the carriage should be slow and
even to produce best results. The part number for
the abrasive is 460107. This paper is sometimes
available at auto body paint shops.
8. Test the type face by making another strike-up of
the type in question and repeat step No. 7 if required.
9. Check the impression on the customer's application.
10. Do not use an abrasive heavier than that recom-
mended. A lighter abrasive works too slowly. Stoning
would destroy the curvature of the type face.
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