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Lesson 9
-- Automatic Watch Movement 2 March
2007
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| Tools Required: Movement Holder,
Eye Loupe, Screw Drivers, Tweezers, small boxes |
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| In this lesson, I only introduce the Automatic Winding mechanism
and the Date mechanism. Other mechanisms are same as or
similar to those of the movement discussed in Lesson
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This is a simple China Made Automatic-Winding movement
with the center second hand, date display and the function
of "second hand hacking".
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Unscrew the screw in green
circle and pick up the Rotor. |
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Unscrew and disassemble the Automatic Winding mechanism.
The design is same as the Seiko
Magic Lever.
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All parts of the Auto-Winding Mechanism |
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Release the power. |
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Unscrew and pick up the plate. |
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Parts in green
ellipse
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Pay attention on the end of the Mainspring (Y-
shape).
This design let the Mainspring slide along the
surface of the inside surface of the Mainspring
Barrel when the Mainspring is fully winded.
Therefore, the Mainspring will not be broken
by the unlimited winding by the Automatic-Winding
mechanism.
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Pull the stem to the 3rd position (Time Setting)
A lever will stop the Wheels from turning - second
hand hacking.
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Unscrew and pick up the plate.
Caution !!!
There are many small parts under
the plate.
The slot on the plate is for putting back an U-shape
spring mentioned later.
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Pull the stem to 2nd position (Date Setting)
When turning the crown, a gear will push A
and B will push the "Date
Plate"
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This mechanism locks the Date Plate in the correct
position.
Pay attention to the U-shape spring.
Pull it out and place it back through the slot on the
plate during assembly.
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When the Watch is running, the hour wheel turns and
turns the Date Plate every 24-hour by A.
If there is a Day Plate, B
will change the day as A.
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