What is the first thing you check if positional error is high?

[Nucejoe]

Can you show a cloce up of the lock, deep lock is rather easy to dismiss and eliminate from list of unknowns.

Dose the rate drop immediately as you put the movement to FU or down position?

Dose escape arbour have end stones? 

Dose fork arbour fall on its pivot shoulder as you flip the movement over? 

 

[EatPeach]

3 hours ago, Nucejoe said:

Can you show a cloce up of the lock, deep lock is rather easy to dismiss and eliminate from list of unknowns.

Dose the rate drop immediately as you put the movement to FU or down position?

Dose escape arbour have end stones? 

Dose fork arbour fall on its pivot shoulder as you flip the movement over? 

 

 

 

The rate and amp drop immediately when I turn the movement to vertical position. The escape wheel pivot jewel does not have an end stone. just normal hole jewel. as for the pallet pivot, I dont have a clear view, I can not be sure.

 

 

 

[Nucejoe]

Again can't open the links on your latest post. Lucky plenty of help is always available on WRT.

Immediate amplitude drop as you flip the movement over tells me the effect is highly likely to be from the balance wheel due to heavier weight as compared to lighter weight of fork or escape arbour. No rocket science just intuitive.

 

[JohnR725]

6 hours ago, EatPeach said:

As for the timekeeping,  any vertical position will lose 10~15s/day so that's a problem.

just to summarize from this discussion we have two perceived problems?  There is an amplitude problem and a timekeeping problem.. I'm noticing that it appears to be were only addressing the amplitude problem whereas you would also like to address the timing problem correct?

I'm attaching an interesting PDF  then an image out of the PDF..   Then  the image that I snipped out  has two separate boxes  for problems. One of them is amplitude which everyone else is addressing so I won't worry about that.. Then there is the timekeeping or the Delta problem.. Delta is basically a the difference of the various positions it should be a really tiny number. That's the box  that we want to look at at least for timing. tthere is a reference to having the hairspring centered in the regulator pins and of course the regulator pins have to be close together.. This is a classic problem location if those regulator pins are too far apart amplitude  will affect timekeeping dramatically exactly what you have. So we need to look at your hairspring and regulator pins..

Omega from cousins 8643_WI_81 BASIC CHECKS AND SETTINGS OF A MECHANICAL WATCH_EN.pdf

[JohnR725]

if you want to understand a little more about hairsprings here's a video that should be helpful

https://youtu.be/4EYk787sjAM

 

[EatPeach]

Thank you guys for your kindly help! A conclusion: The pallet and the escape wheel is the fault. I pick a pair of them function the best. Now the amp is 270 and positional error is getting controlled (within 15s/day)