Time adjustment on Asia 7750

[moa]

Hi everyone, the clock is late by about a minute a day, I tried to move the racket towards the + sign but it reached the end of its travel. How can I do it? Thank you

 

[H90063]

Hi,
I don't know this movement but I would have moved this one counterclockwise...

do you have a timegrapher ?

 

[moa]

Hi,
I don't know this movement but I would have moved this one counterclockwise...

do you have a timegrapher ?

I don't have a timegrapher. so I don't have to move the hand I highlighted, but the one you highlighted? The one you indicated is the racket, right?

 

[Plaasbaas]

Hi,
I don't know this movement but I would have moved this one counterclockwise...

do you have a timegrapher ?

Move the lever highlighted in red to the left but don't slip. If you foul the spring it's game over.

 

[moa]

Move the lever highlighted in red to the left but don't slip. If you foul the spring it's game over.

In fact, I knew that to move faster you have to move the racket away from the python. Right?

 

[H90063]

Yes move this one. As said, don't slip, you need to have good eyes

But without a timagrapher it will be sporty. Each little movement can make you add 1 min or more a day. It must be an imperceptible move first...

 

[moa]

Yes move this one. As said, don't slip, you need to have good eyes

But without a timagrapher it will be sporty. Each little movement can make you add 1 min or more a day. It must be an imperceptible move first...

Ok thanks.
Sorry, but what is that little switch highlighted in blue that I moved for?

 

[H90063]

Don't. Maybe something like beat error ? when you move it you see the points aligned or not on the timegrapher

Without it impossible to adjust back. You can move it back approx the previous position if you remeber it. But maybe i'am wrong

 

[H90063]

I wanted to say, I don't know

 

[KJ2020]

Hi everyone, the clock is late by about a minute a day, I tried to move the racket towards the + sign but it reached the end of its travel. How can I do it? Thank you

You should not attempt to regulate a movement without a timegrapher. There are apps that can turn your phone into one. I cannot recommend one as I have never used one but they look reasonably reliable. Without some way to measure your regulation attempts, you can easily make things worse.

The lever with the two gold dots is the one that adjusts seconds per day (s/d). The lever with the single blue dot adjusts beat error. Sometimes adjusting one parameter will change the other. But often changing only the s/d lever position will be sufficient. The tiny lever you circled is a micro adjustment lever. It actually moves the two gold dot (s/d) lever in increments so tiny you may not see it.

So get a timegrapher and reset the micro adjustment lever to center so after you regulate you can use it for micro adjustments. Make sure the watch is FULLY WOUND, about 30 turns on the crown. Use some form of magnification to make your adjustments.

Now you are ready to regulate. Increase s/d by moving the s/d arm AWAY from the beat corrector arm (single blue dot). Decrease s/d by moving the s/d arm TOWARD the beat corrector arm.

If your beat error is high (> 0.5ms) it can be adjusted also. It is generally adjusted first since it will change the s/d reading due to changing the two arms' relative positions as explained above. Nudge the beat corrector arm a tiny bit one way and observe the result. If the beat error increases, nudge it the other way until the error is reduced.

All adjustments should be made in as small increments as possible. It's common to overshoot the target position many times before reaching it, so you have to keep going back and forth until you reach it.

Here's a recent optimal result for an A7750

 

[Rx4Time]

Try watch accuracy meter if you're on Android as a free app. Also, hack to movement before messing with the timing.

 

[KJ2020]

Hacking the movement would be useful to practice moving the levers as it reduces the risk of damaging the hairspring from a tool slip.

But the movement needs to be running to measure its performance. I've never hacked a movement every time in between the dozens of adjustments that are often necessary to reach optimal settings.

 

[moa]

Thanks guys, you are awesome.

@Rx4Time Now I download the app, can you explain how it works?

@KJ2020 So before I start, I bring the little hand to the center of the + -? Opened from new it was almost towards the end of the +

Thank you for your patience, guys!

 

[KJ2020]

Thanks guys, you are awesome.

@Rx4Time Now I download the app, can you explain how it works?

@KJ2020 So before I start, I bring the little hand to the center of the + -? Opened from new it was almost towards the end of the +

Thank you for your patience, guys!

Yes bring it to center.

 

[Rx4Time]

Start it and hold the mic on your phone to the watch. That gives a reasonably accurate gauge for how your watch is running. How far off does it say the watch is running? Remember, it's always possible the movement could be magnetized as well.

 

[moa]

Start it and hold the mic on your phone to the watch. That gives a reasonably accurate gauge for how your watch is running. How far off does it say the watch is running? Remember, it's always possible the movement could be magnetized as well.

this is the result. what do you think?

 

[Rx4Time]

this is the result. what do you think?

I think you're magnetized. There's are free gauss meter apps on Android.

For reference here is my genuine speedmaster reading on that app just so you can see what a healthy movement would look like. The big thing is the rate and beat error.

 

[moa]

I think you're magnetized. There's are free gauss meter apps on Android.

For reference here is my genuine speedmaster reading on that app just so you can see what a healthy movement would look like. The big thing is the rate and beat error.

so what should i do?

 

[Plaasbaas]

Magnetism usually makes the watch go faster, quite often significantly faster. Yours is loosing time. And the beat error should be adressed, too.

 

[Plaasbaas]

so what should i do?

Read again what KJ2020 wrote above and follow the instructions.