757443

Seiko 9RA5 Manual

4
Zoom out
Zoom in
Previous page
1/16
Next page
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
… 4 …


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Seiko 9RA5 at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Seiko 9RA5 in the language / languages: English as an attachment in your email.

The manual is 1,93 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

Others manual(s) of Seiko 9RA5

Seiko 9RA5 User Manual - German - 16 pages


The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info