P4GTR

Your welcome, hoepefully it makes sense...

Isn't that a children's song "...old Macdonald had a farm...with a Hack Hack here, and a Hack Hack there..." he must have had a 7750 as well...

It makes perfect sense. Your joke however.. I don't think its going to make the cut, it doesn't quite hack it!

After servicing, all movements are adjusted to +6 to +8 seconds a day on the analyzer. This setting is the one that typically produces accurate timekeeping while being worn, the problem of course is that not everyone wears their watches the same way, not everyone moves enough while wearing the watch to have it fully wound, different temperatures are encountered while wearing the watch, and if that wasn't enough, the factory specs on the A7750 are probably no better than + - 30 seconds or more a day...so while 30 seconds sounds bad, it's actually within the design specs of the movement.

A partially wound movement will run fast, so this may be the cause. You can always handwind it carefully and slowly 25+ turns and see if the rate improves, this will confirm partial winding while being worn.

The key is consistancy in the rate, in other words does the watch run 30 fast each and every day it's being worn, if this is true, then slowing it down by the 30 seconds should solve the problem. It is very normal for a watch to gain, and loose, or run even, during different times of the day. The only true test is to adjust the time to an atomic standard, check it 24 hours later, and see what you get, do this a few times and if your getting the same readings, make the fine adjustment. Without an analyzer it's hard to know how much to move the adjuster, so it's hit and miss.

A regularly serviced movement shouldn't wear out, since the pivots are turning in a film of oil. If the movement is serviced, then I would say the winder is a good choice, but it most likely won't keep accurate time on the winder, your wrist is not a winder, and vice versa. If you don't want it running all the time, you could always hack it at the time you normally switch watches, say every morning, that way you don't have to move the hands a lot to get it synchronized when you put it back on, leaving it hacked won't hurt anything.

As for start up, a few slow easy turns of the crown to give it a charge and then wear it, being uni-directional winding, it takes a lot of wrist movement to keep it charged, most times the rotor spins the other way instead of winding it.

Lume looks great, good picture quality.

That explains a lot. It was minimally wound, so that could explain the deviation. This has been very informative, cleared up many questions. Also, I never thought about hacking it. Thank you for the teachings, Z.

Awesome pics

I've done florida and it certainly was warm... lol

Makes me laugh how these tree huggers moan about how much energy America uses on Air Con etc - have they been to Middle America in summer??

My AC helps reduce global warming by cooling the air! I don't know how you could live without it here. Sleeping would be horrible.

Freddy has got it right.

The reason for this (and it's common on the ETA's as well) is due to the offset cannon pinion location. In most movements the cannon pinion, which carries the minute hand, is attached directly to the center wheel pinion, when the center wheel moves so do the cannon and the minute hand. This is not the case on the 7750.

On the 7750, the center wheel is not actually in the center, it's off to one side. To the center wheel is attached the cannon pinion gear, this gear drives the minute wheel, which in turn drives the gear that the minute hand attaches to.

So instead of direct drive for the minute hand, you now have 3 gears between the driving gear, and the hand, which means there is slack and therefore play.

I have had success with setting the time backwards to take up the slack.

Just remember that everytime you set the time, you are ever so slightly wearing out the cannon gear clutch, on all watches, not only the 7750, so do it as little as possible.

This is the guy I trusted one of my favorite pieces to, and he did an incredible job of course. Thanks for chiming in my friend, nice to E-see you!

Look at this lume work... She's looking good, fellas.

Freddy, thank you sir, I believe you nailed it. Here we are about 12 hours later, the trick worked, however the watch is about 30 seconds fast.

-If it is gaining a bit since service, should I (being familiar enough with doing so) use the micro adjust index (#1 in diag.) accordingly? Zig, maybe you are familiar with this individual piece enough to tell me how accurate it was for you, and where to go at this point.

As far as wearing out the clutch, that raises another interesting question. For a watch that is in rotation maybe once a week, is it better, longevity wise, to keep it on a winder, or let it die and reset it? Also, I am correct in that you should swirl the 7750's to start them, no turn or two on the crown to put a little reserve in it?

I've been doing exactly that Freddy, with mixed results. The problem is i've used two different watches to hypothesize. I knew it was not my two chrono's being out of whack, but me not knowing those little intricacies.

I'm going to set the Skyland right now and report back. The watch is less than a year old, kept great time prior, but is fresh back from a The Zigmeister overhaul. A worthy test subject.

Here go's the-

"move the minute hand several minutes past the point you want to set it to & then move it back (counter-clockwise) to set it, you will minimize the deviation.

At 12:27pm I moved it way past, than set it to 12:30... and plunged the crown. We'll see how it go's tomorrow morning.

Do you mean the watch... or Don Johnson?

Er... BT...?

You've got to [/mancrush]. You have a wife and child to think about.

Ken and 'nuq may disagree, and try to lure you in, persuading you to review replica Manolo stiletto's. Get it together man!

My two A7750's keep extremely accurate time, one of which, serviced by The Zigmeister. A peculiar thing I've noticed with the minute hand specifically on all chrono's has lead me to believe i'm doing something wrong. When I set the time, the minute hand seems to take a minute or two to engage. For instance, I set my Skyland this morning, and checked it many hours later now at 11PM, its accurate down to the exact second, however the minute hand is two minutes behind! It's not losing time so much as its taking time for the minute hand to engage after I set the time.

What am I doing wrong?

Fantastic photo from you powershot. What photoshop tricks have you done to make it look so good? My wristshots -always- suck. I'm right handed and wear my watch on my right wrist.

I don't know what I'm going to wear today. Omega sent me their new catalog in the mail and I didnt even ask for it. Maybe it will be an Omega day.

Its the best you're going to find without dropping hundreds of dollars on a WM9.

Buy it from someone that will send you pics of your watch before shipping it, then let us have a look at it before you give the OK.

Interesting. He pulled a bait and switch. Hopefully you get an auto dial out of him.

I cought that right away, only because I have a quartz model. I feel for you having your bubble burst like that. No one notices the "Chronometer" missing, look how long it took even on here.

No big deal. Would you notice looking at mine? Only after someone pointed it out right?

However I'm sure you don't want to build a franken auto with a quartz dial. How much did you pay for it?

For the past 3-4 days...

Havent seen the movie but i'm looking forward to it, and Leo's Day/Date.

The genesis coupe and sedan are both really impressive. I wouldn't mind having a go at tuning up one of those 2L turbo coupe's.

I think you guys over think this stuff sometimes. There is variation amongst the gens as well.

At some point should you just go gen, because the reps never going to make you happy.

I'm speaking in general, not to any of you specifically.

good to know, thanks for updating!

Why. Because she can? Should she go crash an Enzo next then?

Please let us know your findings.

A pretty funny guy gave you that member title!

Speaking of, that thread is about due for a resurrection.

Weather.com says...

"Dangerous heat index. Outdoor exposure should be limited."

"Feels like temperature today 107 degrees."

No wind. Humidity ranges from 60-80%. Your clothes stick to you as soon as you walk out the front door. Check your mailbox, you will perspire, smacked by damp heat. Anyone that's visited Mickey Mouse during the summer knows what i'm talking about.

After an early evening thunderstorm last night, wildlife abounds! I had a hard time capturing the pics, my lens kept fogging up from the humidity. So, one good shot, and two quickies, fair?

They come out of the grass after the rain...

A common tree frog. Posted up on my tiki torch poll.

"Hey Dan! You throwing steak on the grill tonight, hook a lizard up!"

Those are lizards called anoles. They are everywhere. I'll get a better picture for you soon. If you look at the one above, that little guy broke half his tail off and grew it back, notice the grey section.

have bought 30 items from him, of them only one has ever had problem that needed to be returned.

Really? Seriously?! That has to be a record. 30 watches and one problem?

You sir, have somehow managed to stop the replica space time continuum, and transport perfection (less 3%) through some sort've Guangzhou rabbit hole. I'd say you need a moon watch immediately, with all this space age [censored] you have going on, but you probably already have one- in perfect condition no less. Take me to your leader!

As far as this new QC.. I could speculate either way.

Josh could very well be scoffed he's bleeding money just like the consumers, sending watches back and forth, sending replacement parts on the house. The cost to cease that practice could be less than letting it continue. Maybe the pics serve two purposes. Not only for buyers, but for him to ultimately QC his runners, the ones dropping the ball.

Maybe my upside down flip lock clasp was the straw that broke the camels back. It could be me, that has changed things forever! Viva la revolution!

Space age [censored]. Moonwatch man... Moonwatch.

I'm sober, seriously, I'm not into that anymore. But the google search for that image had some tasty looking pictures.

Anyone see the new banner on Josh's site? Top right of his page, "Quality Check Procedures"

He's outlines a new QC model. He is now delivering pics, including pics of watch on the timing machine, and waterproofing for watches $200 and up.

Sounds like a positive step...

Discuss!

Hey David, welcome back. Sorry I don't know a good spot for a riveted bracelet. Just hit the trusted dealers sites and browse around the Rolex section.

Nice chop!

can't wait to see the casework. I think you have some good ideas for straps, in the meantime you may want to look at a ZRC, if you need something economical to use while waiting for a custom commissioned strap to be finished. They had a huge selection of these at a watch stand in my local mall, so you may want to check yours. Some were inexpensive, some got pricey! Lots of 18mm varietal.

http://www.zrcbracelet.com/uk/index.php

I have a similar project on my hands. My grandfathers vintage Seamaster. They loved their stretchy metal bands didn't they? I retired that in favor of, you guessed it- a ZRC strap. I've done some case work, the movement works fine, but I would of course like it to be serviced. Its been on the to-do list for a while like your project. Here it is. The strap is very nice for the cost.