Xerox OLYMPIA ELECTRONIC COMPACT - 3.13. Character printing

l
3.13. Character printing
After pressing a key (paragraph 3.03), the typewheel motor controlled
by the CPU (paragraph 3.11) brings the typewheel to the position for
printing of the selected character. The shortest turning distance
from the last typewheel position will be selected. At the same time
the ribbon lift and feed are effected by the ribbon motor.
After a certain waiting time, the hammer solenoid is powered and strikes
the plunger with the hammer and the typewheel spoke against the platen.
Then the carrier transport starts the spacing step selected by the
pitch selector slide switch. At the same time the ribbon is lowered.
If no further signal of key operation follows, the typewheeJ turns
back after 1.3 sec. to its home position (See Fig 7).
Typenabdruck/Typing
Ty pen rad
· lecti'on
farbtland
Ribbon
Abschlagaagnet
Ha•er
Oruckwerk
Carrier
Korrektur/Correction
Typenrad
Selection
Korrekturband
IO'lms
Carree ti on ribbon 1----4--lt!'.LL..CLL.'LLJ.~LL.t.~U.LL.£..~----~'.L.£...~.£...£..<'-4-LLJ;..J.:.L.L.<.J;..L.LL....<U---
Abschlag.agnet
Hamer
l14ms
Fig-7
3.14 Ribbon transport, ribbon lift
L14
The ribbon motor A1 moves from its home position 11 steps= 82.5° in
one direction.
The ribbon lift cam A2 swings the ribbon center guide-R 84 via the cam
follower and the ribbon lift crank 85. The center guide-L is turned
together by means of the tooth connection. Thus the ribbon is lifted
to the printing position.
The ribbon feed cam AS moves the ribbon feed arm A6 via the cam
follower and the cam lever A7. The ribbon feed arm pushes the finger
plate, so that the feed wheel AB turns counterclockwise. The ribbon is
transported by the rubber roller A9.
The ribbon feed spring A10 turns the ribbon feed pulley A11 and the
used ribbon is wound up.
After printing, the ribbon motor turns back its home position. For
_J