1973
Cal. 1310
24
9.1. Adjust the retaining click into position shown
by figure 1, the end of the click to be used as
guiding-mark to observe the movement of the
second wheel.
9.2. Put hand setting stem into setting position and
turn it slightly in both directions to observe the
movement of the second wheel in comparison
with the click; to be suitable, this movement must
be 1/4 to 1/2 of the distance between two teeth
(figure 2). Repeat this control twice after 20
seconds
(= 120°).
9.3. If the backlash has to be modified, turn the
eccentric for motor in the direction suitable to the
required correction.
IMPORTANT
Whilst moving the crown, a displacement of the
rotor might be observed by microscope; this
deplacement increases the movement of the
second wheel and therefore, falsifies the
measuring. The first movement of the wheel must
be considered and not the movement caused by
addition of the endshake of the rotor.
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