Olivetti CMS 140 B euro, Руководство по обслуживанию

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2-8 Service Manual 686770R
2.2.3 PRINTING MECHANISM
The printing mechanism performs two operations:
printing and carriage movement.
Printing operation
(See Fig. 2-7)
When the print gear series (see Subsection 2.2.1,
Transmission/Select Mechanism) causes the print
shaft and print cam to rotate in the direction of a
arrows (1) and (2), the hammer rotates in the direction
of
➡
arrow (3).
Thus, the print wheel is pressed in the direction of
➡
arrow (4) by the hammer, and printing is performed.
The print wheel, similar to the print changeover cam,
rotates once with each printing operation, and printing
is performed during the first half of the print shaft
rotation.
Fig. 2-7 Printing Operation
Carrying operation
(See Fig. 2-8)
Carrying is performed after printing, during the sec-
ond half of the print shaft rotation. As soon as the
positioning plate begins rotating the print gear, the
cam section of the print gear unlock its meshing the
return lever, and the print gear meshes with the print
cam.
When the print shaft rotates in the direction of
➡
arrow
(1), the meshing between the teeth of the print cam
and the teeth of the positioning plate causes the print
shaft to slide in the direction of
➡
arrow (2) while
rotating in the direction of
➡
arrow (3). The simulta-
neously with this carriage unit is carried sliding action
(
➡
arrow (4))
Fig. 2-8 Carrying Operation