Grand Seiko Spring Drive 9RA5 Скачать руководство пользователя страница 4

Spring Drive Mechanism 

1

Taste of a Mechanical Watch

                         

+

High accuracy equivalent to a Quartz Watch

That is the concept of the Spring Drive.

Let’s start from the drive method of a watch.
The method for driving a watch is divided into two types.
They are 

mechanical type and quartz type

.

In a mechanical watch, the mainspring is wound and its unwinding power moves the hands.
Amazing mechanism created by high quality craftsmanship,
and admiration goes to skilled craftspersons with passion.
You can feel the appreciation and personal touch of the craftspersons in the ticking sound.
On the other hand, with quartz watches, the quartz is oscillated by a battery and the hands are
turned by a motor.
It is characterized by accuracy using state-of-the-art technology.

What is the Spring Drive like?
This is not a mechanical watch or a quartz watch.
In one word, this is a 

“mechanical watch having accuracy equivalent to a quartz watch.”

The Spring Drive is a self-contained drive system that realizes accuracy equivalent to a quartz
watch with only the power of the mainspring and has no battery, motor, or secondary battery.
Accuracy of monthly rate of ±10 seconds or ±15 seconds equivalent to a quartz watch is
achieved while using a mainspring.
The Spring Drive is Seiko’s proprietary mechanism which is made available only by SEIKO’s
unique combination of skills in both 

mechanical and electronic micro-engineering

.

Then, how could it be possible to achieve such a degree of accuracy?
That is explained on the next page.

4

Spring Drive Mechanism 

2

The power of the mainspring is regulated by electronic

control. That is the essence of the Spring Drive.

What controls the accuracy of a mechanical watch is
the balance spring, a part of the speed-regulating unit, called the balance.
This part influences the accuracy to some extent
because it is made of metal which expands and contracts with changes in temperature.

The Spring Drive is
completely different from a mechanical watch in this speed-regulating unit.
The Spring Drive is powered by a mainspring, but adopts an electronic speed-regulating unit
comprising 

a generator, IC

, and 

crystal oscillator

.

In a little more detail,
at the end of the train wheel that moves the hands, a series of speed increasing wheels with a
glide wheel are provided.
The unwinding power of the mainspring rotates the glide wheel, generating electricity in the coil
to drive the crystal oscillator and IC.
The IC controls the spinning speed of the glide wheel by applying and releasing 

the

electromagnetic brake

, while comparing the accuracy of the electric signals generated by the

crystal oscillator and the spinning speed of the glide wheel.

In addition, by making the energy transfer of the train wheel efficient and adopting an IC that
drives with low power consumption, power reserve far exceeding normal mechanical watches
is realized.
An unprecedented drive system which offers 

quartz accuracy

.

This is the Spring Drive.

5

English

Содержание Spring Drive 9RA5

Страница 1: ...Printed in Japan BSJ9RCD A2002...

Страница 2: ...ertake the service If your watch has a protective film for preventing scratches make sure to peel it off before using the watch If the watch is used with the film on it dirt sweat dust or moisture may...

Страница 3: ...iverealizesmuchgreateraccuracythanconventionalmechanicalwatches Thewatch also embodies the concepts of Grand Seiko that continues the challenge of creating the best practical watch 1960 Released the f...

Страница 4: ...lectronic micro engineering Then how could it be possible to achieve such a degree of accuracy That is explained on the next page 4 Spring Drive Mechanism 2 The power of the mainspring is regulated by...

Страница 5: ...mechanical watches since the crystal oscillator controls it Note Accuracy of the Spring Drive Average monthly rate of 10 seconds or 15 seconds is the accuracy of a watch when it is worn on a wrist at...

Страница 6: ...ed to the watch may damage your clothes or injure the hand neck or other parts of your body Please keep in mind that if a watch is taken off and placed down as it is the case back the band and the cla...

Страница 7: ...m a faucet is high enough to degrade the water resistant performance of a water resistant watch for everyday life 10 CAUTIONS ON WATER RESISTANCE If water resistant level of your watch is defined as D...

Страница 8: ...ith spring bars buckles or other parts b CAUTION If you notice any abnormalities contact the retailer from whom the watch was purchased or Grand Seiko international service network mentioned on CERTIF...

Страница 9: ...ase water resistance Be careful not to screw the crown in by force as it may damage the slots of the crown Turn the crown from time to time P 23 Screw down crown The screw down crown features a mechan...

Страница 10: ...level of the remaining power How to read the power reserve indicator P 16 When starting to use a stopped watch it is recommended that you turn the crown to wind the mainspring To wind the mainspring u...

Страница 11: ...3 The seconds hand will stop moving when the crown is pulled out to the second click Do not stop the movement of the seconds hand for longer than 30 minutes If the stoppage of the seconds hand moveme...

Страница 12: ...ir services after the guarantee period has expired if the functions of the watch can be restored by repair work we will undertake repair services upon request and payment Replacement parts Please keep...

Страница 13: ...te without fail Others For the watch case dial plate hands glass band etc some alternative parts may be used for repair if necessary For length adjustment service of metallic band ask the retailer fro...

Страница 14: ...ay result in the band being cut Take care not to damage the band with an edged tool Notes on skin irritation and allergy Skin irritation caused by a band has various reasons such as allergy to metals...

Страница 15: ...erature below 0 C the watch may stop if the power reserve indicator is showing less than one fifth of the power reserve The watch temporarily loses gains time The watch has been left in extremely high...

Страница 16: ...rcuit Oscillator frequency divider and spring drive control circuit C MOS IC 1 piece Jewels 38 jewels 1 The average rate is estimated in a condition when the watch is worn on your wrist within a tempe...

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