IBM Selectric Reference Manual

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11
Minimum
FIGURE 258.1 Last Column Contact (Late)
PAPER FEED MECHAN ISM
NOTE: For pin feed platen machines, use adjustments
7, 8, and lOon I y •
1 . Before any paper feed adjustments are attempted, the
position of the platen MUST be correct.
2. Paper Feed Braces (early paper feed mechanism only)
With the feed roll tension springs disconnected the ad-
justable braces fastened to the paper feed mounting arms
should be adjusted all the way forward without deflect-
ing either the feed roll actuating shaft or the carriage
tie rod (Fig. 259).
Feed Roll Actuating Shaft Support
. 0'l5° to .030"/
--/
/ "
,.... I
\ Ii I
" ',./
---
Carriage Tie Rod
Support
FIGURE 259. Paper Feed Mechanism
2-86
3. Paper Feed Supports
e. Early Paper Feed Mechanism - With the feed
roll tension springs disconnected, the vertical sup-
ports for the carriage tie rod and the feed roll act-
uating shaft should be adjusted to just touch the
bottom of each shaft (Fi g. 259). The feed roll act-
uating shaft support should be loose when the tie
rod support is adjusted.
b. Late Paper Feed Mechanism - With the feed
roll tension springs disconnected, the center sup-
port bracket (Fig. 260) should be positioned so
that the forward I ug just touches the undersi de of
the feed roll shaft while the rear lug just touches
the top of the carriage tie rod. The center sup-
port bracket shou I d not bow the copy contro I sha ft .
Carriage Tie Rod
Feed Rol I Shaft
Center Support Bracket
.........
FI GU RE 260. Center Support Bracket
4. Feed Roll Tension - Place the feed roll tension springs
in the hole of the front feed roll arms that wi II provi de
the following tension measured at the front feed roll
pivot poi nts •
11 inch machine - 2-3/4 to'3-1/4 pounds
15 inch machine - 2 to 2-1/2 pounds
..•. !t
5. Feed Roll Si.de Play
a. Early The right hand paper feed mounting arm
on
the 11 inch machine and the left and right hand
paper feed mounting arms on the 15 inch machine
should be adjusted to provide the rear feed roll
shafts with an end play of .015" to .030 II when the
feed rolls are agai nst the platen (Fig. 259).
b. Late The right hand front feed roll arm
assembly on the 11 inch machine and the left and
right hand front feed roll arm assemblies on the 15
inch machine should be adjusted to give end play
to the feed roll shafts that wi II not permit them to
contact the si des of the openings in the deflector
but wi II permit them to roll freely (Fig. 260).

IBM Selectric Specifications

General

Type	Electric typewriter
Introduced	1961
Keyboard Layout	QWERTY
Carriage Return	Electric
Manufacturer	IBM
Printing Technology	Typeball (golf ball)
Power Source	AC Power
Power Supply	120V AC