How can I start fixing the pinion tension spring of Omega 561-752 movement family?

[kaan]

Hi Watch Repair Talk family,

I became an Omega C-Cased Constellation collector and improved my skillset first removing/attaching hands as they(hands/dial) were getting slightly damaged if I chose to have a watch serviced by my watchmaker, then over time and doing small operations, I can now almost completely disassemble/assemble a movement - however my troubleshooting skills are lacking

A main expertise for these movements in my opinion is calibrating the pinion tension spring, it's a very analog task, for example I have one watch that seems to be keeping time but skipping seconds over a long period

As far as I've read, amplitude is useful when understanding whether the tension is high or low, I've been using "Watch Tuner" on my phone, very unreliable, I believe I should buy a timegrapher to be able to properly debug this, my first question is, is this assumption correct and would a Weishi 1000 or 1900 from China enough to tackle this problem?

Other than this, how can I learn more about debugging different situations, for example what happens when the tension spring is applying lateral tension etc. - Should it apply lateral tension towards the wheel and so on. 

Regards,

Kaan

[JohnR725]

7 hours ago, kaan said:

"Watch Tuner" on my phone, very unreliable, I believe I should buy a timegrapher to be able to properly debug this, my first question is, is this assumption correct and would a Weishi 1000 or 1900 from China enough to tackle this problem?

Yes the phone apps tend to all be unreliable. Either the 1000 or the 1900 machines work fine. It would be preferred though to buy the 1900 it is a bigger screen and much nicer for looking at.

Then of course the first step of fixing the spring problem is to make sure the watch is properly running. In other words is been properly cleaned and lubricated then you can worry about the spring.

7 hours ago, kaan said:

A main expertise for these movements in my opinion is calibrating the pinion tension spring, it's a very analog task, for example I have one watch that seems to be keeping time but skipping seconds over a long period

Usually the sweep tensioning spring isn't an issue. All it has to have is enough pressure to keep the pinion under a little bit attentions the secondhand doesn't flop around. If you're skipping seconds over time I seriously doubt that the spring would be the issue there'd be some other issue like a timekeeping issue. That's why at real timing machine is nice to the proper assessment and proper assessment means timing and more than one position. In other words timing were looking at the watch on the timing machine dial-up and dial down and at least one crown positions like crown down.