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Lesson 9 -- What
is 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
7. |
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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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