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I am new to watch restoration. So far i was repairing two watches seiko 7002 and seiko 6309. 

I manage to dissasemble, clean all parts except balance wheel in isopropyl 99% and then assemble and lubricate with proper oil. My cleaning included clean of mainspring and in case of seiko 6309 replacing with new generic mainspring. 

When i partially check once i setup the train bridge and move main barel i can see train wheel nicely move and escapement wheel is spinning freely. After i add palet fork and then put back balance wheel the movement doesnt start by itself. It always needs like a small pinch to it by tweezers. And then it runs. But i can feel that the main spring is already wound so it needs some power to run.

When i check on timegrapher by changing the regulator i can get to +-10s/day amplitude of 260 and horible error beat of 6ms

Watch runs maybe 8h and then stops. Where do i repeat my mistake? Without any feedback i dont know what do i do wrong so hoping somebody could point me to right direction. 

Thank you 

Tomas

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28 minutes ago, tomassatka said:

movement doesnt start by itself

 

28 minutes ago, tomassatka said:

horible error beat of 6ms

 

The high beat error can be responsible for the balance not starting up by itself. 

You should be able to adjust the beat error with the stud carrier here:

Screenshot_20250116_230320_Chrome.thumb.jpg.e407243707c6fcea297b154e20a3fb1e.jpg

 

When you get the beat error below 1.0,or better to below 0.3, it should start up by itself. If not, you have a different problem. 

 

 

 

 

31 minutes ago, tomassatka said:

Watch runs maybe 8h and then stops

This may indicate another problem. But first correct the beat error, wind fully (!), and check power reserve again. 

 

Best of luck, 

C

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