Certina 23-36 beat error and regulation

[tonydagee]

Hello all.

some help required with beat error correction please..

after service numbers are not good. I’m trying to address but the movable stud arm is really stiff and would move only with force.

Any suggestions?

thanks!

tonyg

 

[AndyGSi]

Is that fully wound?

If it is then I think you first need to address the amplitude.

[praezis]

1 hour ago, AndyGSi said:

If it is then I think you first need to address the amplitude.

… and the rate.

Beat error is not your problem at all. B.E. at target amplitude 270° will be about 3 - no problem.

Frank

[AndyGSi]

3 minutes ago, praezis said:

… and the rate.

Beat error is not your problem at all. B.E. at target amplitude 270° will be about 3 - no problem.

Frank

I expect the rate would improve with more amplitude.

[praezis]

1 hour ago, AndyGSi said:

I expect the rate would improve with more amplitude.

Maybe. But 307 s/d is much.

[AndyGSi]

14 minutes ago, praezis said:

Maybe. But 307 s/d is much.

I agree but until you've got a decent amplitude you can't do anything about the rate.

[Klassiker]

I suggest repeating the service from scratch, including stripping and cleaning the regulation assembly.

Edited February 22 by Klassiker

[AndyGSi]

12 minutes ago, Klassiker said:

I suggest repeating the service from scratch, including stripping and cleaning the regulation assembly.

That all depends if it's still the old mainspring or if they've fitted a new one.

[nevenbekriev]

7 hours ago, tonydagee said:

... but the movable stud arm is really stiff and would move only with force.

Any suggestions?

thanks!

tonyg

 

No movable stud arm there, what force... The regulator arm is movable against the fine regulation screw arm.

[caseback]

1 hour ago, nevenbekriev said:

No movable stud arm there

Could there be versions with and without a movable stud? I have a 23-36 here with a movable stud arm.

And, as suggested: It's probably better to re-do the service first.

Edited February 22 by caseback
Typo

[nevenbekriev]

Now I see I have been wrong. Looking from above gives the impression the stud carrier is part of the cock.

[RichardHarris123]

55 minutes ago, nevenbekriev said:

Now I see I have been wrong. Looking from above gives the impression the stud carrier is part of the cock.

You usually have eagle eyes, maybe you need glasses.  Hehe. 

[JohnR725]

On 2/22/2025 at 3:45 AM, tonydagee said:

after service numbers are not good

why don't we start with the basics of servicing? What was the watch doing before servicing. Did you change the mainspring and any other problems you observed

11 hours ago, nevenbekriev said:

Now I see I have been wrong. Looking from above gives the impression the stud carrier is part of the cock.

usually on watches like this when I'm not sure I go and look online to look at pictures to give me a clue as to whether the regulator and the stud carrier or where there supposed to be. Although I would be a lot happier with a parts list and we would know for sure. So the ones I'm looking at all look like they're more or less in the same place but  this one does look like it's a little off from the other one so I'm guessing it probably is movable.

ffound the parts list and yes it's a separate component.. Then the regulator itself is actually two pieces the micro part and the other part  so they can be adjusted separately  kinda like a course in a fine adjustment.

On 2/22/2025 at 7:22 AM, praezis said:

Maybe. But 307 s/d is much.

yes that rate is troubling seeing as how  the regulator components seem to agree more or less with what I'm finding online.

Then  were missing a piece of information?  Looking at the parts list this is not an 18,000 BPH watch  I wonder what the timing machine thinks it is?

Then there's the problem of the amplitude? Often times when the amplitude dips down much lower than 200 beat error gets grossly magnified. So until the amplitude is up where it's supposed to be then  the other stuff you don't worry about. This is where  even though the other nifty timing machine you really should visually look at the balance wheel and see what it's actually doing as it may not actually be doing what the timing machine indicates. In other words it may actually look much worse than what were seeing on the timing machine

1798_Certina 23-36.pdf

[tonydagee]

Thanks t all for your insights!

ill strip down, start again and pay close attention to the balance assembly 

[AndyGSi]

22 minutes ago, tonydagee said:

Thanks t all for your insights!

ill strip down, start again and pay close attention to the balance assembly 

So before you do a full strip down, is that the original spring on a full wind?