[Ricky56]

Hi
My timegrapher is telling me something is not quite right (6309a movement)
I have been trying to correct the problem but this is the best reading I can get.
Any suggestions?
Thanks
Riccardo

 

[7s26b]

Did you have a look at the Witschi training manual, in the archives?
It has a lot of information.

 

[zeke441]

This may help:

Rate Stability & Wavy Traces on Watch Timing Machines • Adjusting Vintage Watches

A watch needs stable rates before we can adjust it. This posts describes rate stability and examples of "wavy traces" on a timing machine.

adjustingvintagewatches.com

 

[Aloha73]

Hi
My timegrapher is telling me something is not quite right (6309a movement)
I have been trying to correct the problem but this is the best reading I can get.
Any suggestions?
Thanks
Riccardo

Have you de-magnetised and regulated the movement?

 

[Vette Enthusiast]

With large variations in rate given the sine wave variations check the escape wheel to make sure it runs true. Also inspect closely the gear train for any defects. This would also include the MS barrel and mainspring. I would start with escape wheel first and then move to inspecting the train wheels followed by the mainspring and barrel. Good luck with it.

 

[Aloha73]

With large variations in rate given the sine wave variations check the escape wheel to make sure it runs true. Also inspect closely the gear train for any defects. This would also include the MS barrel and mainspring. I would start with escape wheel first and then move to inserting the train wheels followed by the mainspring and barrel. Good luck with it.

I wasn't certain if he had stripped the watch down from what was stated.

 

[Aloha73]

With large variations in rate given the sine wave variations check the escape wheel to make sure it runs true. Also inspect closely the gear train for any defects. This would also include the MS barrel and mainspring. I would start with escape wheel first and then move to inspecting the train wheels followed by the mainspring and barrel. Good luck with it.

Listen you John's advice.
He's a master and highly knowledgeable.

 

[Ricky56]

Hi guys
Thank you for your inputs.
Yes, I did stripped the watch down a few times. I think I found the problem, the escape wheel.
I had a spare in the drawer, I wasn't sure which movement belonged to but I tried it anyway.
The reading has improved a lot, no more wavy trace. I will be monitoring the movement for the next 24 hours and see how it runs.
Keep you posted
Thanks, R

 

[Vette Enthusiast]

Listen you John's advice.
He's a master and highly knowledgeable.

Definitely not a master at this stuff and always learning from others. I have had my share of problem watches and diagnosing run issues.