7750 running too fast

rik · 9 Ene 2013

hello, I'm asking here to the experts for some infos on how to fix a 7750 that is running too fast.
Looking close I see that the spring under the balance wheel is compressed on one side.
I tryed to extend it with the tweezers, but, as I leave it, it comes back in the old position.
I don't believe it's magnetized, but just can't understand why it doesn't stand simmetrically spiral under the wheel.
Any suggestion?

Golipo · 9 Ene 2013

Hairspring is bent, possibly on the part that goes from the stud and till passed the regulator.
So, some of the coils touch, so the balance "bounces" doing a shorter movement,
making the watch runs faster.

Hairspring work is one of the most delicate matters the watchmaker has to deal with,
so if you are not familiar with it, not to say having the proper tools for it, leave it alone,
and bring the watch to a good-good watchmaker.

Regards,
Alvaro

Chuli · 9 Ene 2013

The language of this forum is spanish. May be you are breaking a rule... anyway... need some pictures of the movement, the balance wheel particulary.

Regards

Golipo · 9 Ene 2013

Send some salame & queso from Chacabuco !!

rik · 9 Ene 2013

for example, my spring, back of the stud, is much more smashed than this one:

(picture borrowed from this post: https://relojes-especiales.com/threads/revisión-de-un-reloj-slava.257081/)

rik · 9 Ene 2013

Chuli dijo:
The language of this forum is spanish. May be you are breaking a rule... anyway... need some pictures of the movement, the balance wheel particulary.

Regards

As I wrote in my presentation, I'm not spanish nor speak spanish....

rik · 9 Ene 2013

Golipo dijo:
Send some salame & queso from Chacabuco !!

and I'm not from Argentina

rik · 9 Ene 2013

Golipo dijo:
Hairspring is bent, possibly on the part that goes from the stud and till passed the regulator.
So, some of the coils touch, so the balance "bounces" doing a shorter movement,
making the watch runs faster.

apparently there is no bending that justifies the accumulation of the coils on one side. It's absolutely true that the smashing causes a shortening of the spring and makes the balance wheel to run too fast. Actually I can't get a good regulation even putting the regulator at the maximum estension, agaisnt the stud.

Golipo dijo:
Hairspring work is one of the most delicate matters the watchmaker has to deal with,
so if you are not familiar with it, not to say having the proper tools for it, leave it alone,
and bring the watch to a good-good watchmaker.

Regards,
Alvaro

My problem was exactly this: trying to fix this without going to the watchmaker. I can completly mount and dismount an eta 2824, but never tryed on a 7750, it's quite more complex, but still wanted to try some trick (if any exists) to fix the problem.
Any suggestion is welcome!

Chuli · 9 Ene 2013

rik dijo:
As I wrote in my presentation, I'm not spanish nor speak spanish....

No problem...

rik dijo:
apparently there is no bending that justifies the accumulation of the coils on one side. It's absolutely true that the smashing causes a shortening of the spring and makes the balance wheel to run too fast. Actually I can't get a good regulation even putting the regulator at the maximum estension, agaisnt the stud.

The bendig between the stud and the regulator makes the spring pass throug the regulator with an unpropper angle and this can be the reason of the accumulation of the coils on one side. But we need some pictures of the movement...

Golipo, salame & queso is coming soon!!!

rik · 9 Ene 2013

Chuli dijo:
No problem...

The bendig between the stud and the regulator makes the spring pass throug the regulator with an unpropper angle and this can be the reason of the accumulation of the coils on one side. But we need some pictures of the movement...

Ok, this evening I'll try to shoot some picture and post it.
Do you believe it is correctable by hand without removing the bridge and the balance?

Chuli dijo:
Golipo, salame & queso is coming soon!!!

AAAhhhh, that was from you, not from me!!
And I also mixed up the sender of the post...!! :ops:

Sorry, I didn't understood...

joseluu · 9 Ene 2013

Fiddling with a hairspring can bring bad consequences, but as a friend said here: "hey, these are watches not human brains". You will not learn if you don´t dare.

rik · 9 Ene 2013

that's true Joseluu, even if they're quite expensive!

By the way: here is the picture. As you can see, beyond the stud there are no coils, as they're compressed near the axe of the balance wheel.
I have to try to regularize the shape of this spring.

Suggestions?

rik · 9 Ene 2013

ok, after some tryes and work with tweezers I could manage to ply it and have a little better shape. At least now it runs slower, before i couldn't manage to slow it down, whatever the regulations I did, it was always too fast. Now it runs a little slow, so now it's a matter of the chrono comparator.

rgil · 9 Ene 2013

Sorry. I do not speak English. This is a machine translation.

The spiral is extremely delicate.
To get an idea. The spiral (photo from Slava,) is perfect.
The shaft is supported out of its housing and that makes it look asymmetrical.

Sometimes I worked correcting spirals.

https://relojes-especiales.com/threads/una-reparación-en-el-volante.28135/

https://relojes-especiales.com/threads/enderezando-la-espiral-torcida-del-segundo-seiko-6309.153297/

At the end, has always been better to get the spiral shaft
With the coil attached to the shaft, it is almost impossible to see where the twisted.
The result is always unpredictable, so it is better, first try demagnetizing and cleaning oil

Saludos

rik · 9 Ene 2013

rgil dijo:
Sorry. I do not speak English. This is a machine translation.

The spiral is extremely delicate.
To get an idea. The spiral (photo from Slava,) is perfect.
The shaft is supported out of its housing and that makes it look asymmetrical.

Sometimes I worked correcting spirals.

https://relojes-especiales.com/threads/una-reparación-en-el-volante.28135/

https://relojes-especiales.com/threads/enderezando-la-espiral-torcida-del-segundo-seiko-6309.153297/

At the end, has always been better to get the spiral shaft
With the coil attached to the shaft, it is almost impossible to see where the twisted.
The result is always unpredictable, so it is better, first try demagnetizing and cleaning oil

Saludos

rgil, Muchas gracias, sus tutoriales son realmente excepcionales, hay mucho que aprender.

En realidad, tienes razón, pero mi experiencia es mucho más limitado que el tuyo, no son actualmente capaces de quitar el puente para separar la bobina del eje de balancín. En primer lugar se debe probar en un movimiento de prueba, pero ahora no tengo disponible.

Una pregunta: ¿es posible que la espiral pierde fuerza y no se ejecuta el cronógrafo?

Golipo · 9 Ene 2013

What is see is:

The mobile stud carrier is far away from the balance bridge,
Also is too close to the regulator.

Try tomove the mobile stud carrier back a bit, towards the balance bridge (anti-clockwise)
and separate the regulator, in opposite direction,

Perhaps, that should do the truck.

regards,
Alvaro

rik · 10 Ene 2013

I've tryed but the result is not good, I'll be better to wait and put it on the cronocomp.

joseluu · 11 Ene 2013

With these machine translations I will end up loosing my job.

Con estas traducciones automáticas acabaré quedándome sin trabajo.

rik · 11 Ene 2013

you work at onu as a translator, don't you?

joseluu · 14 Ene 2013

You clever boy!

rik · 14 Ene 2013

joseluu dijo:
You clever boy!

Te envidio un poco, es un gran trabajo!

rgil · 14 Ene 2013

joseluu dijo:
With these machine translations I will end up loosing my job.

Con estas traducciones automáticas acabaré quedándome sin trabajo.

Pues no creas.
Con las traducciones automáticas, pocas veces llego a entender algo. Lo que pasa es que sin ellas, los que no dominamos el dichoso ingles, no hacemos nada de nada

rik · 14 Ene 2013

rgil dijo:
Pues no creas.
Con las traducciones automáticas, pocas veces llego a entender algo. Lo que pasa es que sin ellas, los que no dominamos el dichoso ingles, no hacemos nada de nada

non preoccuparti rgil: lo spagnolo è la quarta lingua più parlata al mondo. Si può fare tranquillamente a meno dell'inglese.

joseluu · 15 Ene 2013

rik dijo:
Te envidio un poco, es un gran trabajo!

As it happens with many other things in life, you can´t have the cake and eat it too. It is a great job, from the income point of view, if you work for the UN or the EU or something like that, but it is a bit boring. On the other hand, you can translate literature, much more interesting, but only if you get the money for your food from somwhere else, jejeje.

SReloj · 15 Ene 2013

وبما أن هذا هو منتدى الناطقة باللغة الإسبانية، سوف نقدر استخدامنا اللغة.
عندما أذهب إلى المنتديات الأجنبية أذهب على لسانك ولا أعرف ما إذا كنت تستخدم مترجم.

நான் வெளிநாட்டு கருத்துக்களம் போக போது நான் அவர்களின் மொழியில் வெளிப்படுத்த முயற்சி, மற்றும் நான் ஒரு மொழிபெயர்ப்பாளர் பயன்படுத்தினால் எனக்கு தெரியாது

7750 running too fast

rik

Quasi-forer@

Golipo

De la casa

Chuli

Forer@ Senior

Golipo

De la casa

rik

Quasi-forer@

rik

Quasi-forer@

rik

Quasi-forer@

rik

Quasi-forer@

Chuli

Forer@ Senior

rik

Quasi-forer@

joseluu

Forer@ Senior

rik

Quasi-forer@

rik

Quasi-forer@

rgil

Milpostista

rik

Quasi-forer@

Golipo

De la casa

rik

Quasi-forer@

joseluu

Forer@ Senior

rik

Quasi-forer@

joseluu

Forer@ Senior

rik

Quasi-forer@

rgil

Milpostista

rik

Quasi-forer@

joseluu

Forer@ Senior

SReloj

Forer@ Senior