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hoops10 · 28 January 2011, 05:42 PM

I have a question regarding the chrono function on the Daytona. I know that the pushers have to be unscrewed to activate the chronograph function. My question is after the chronograph has been activated do you need to leave the plungers unscrewed while the chronograph is running or can you screw down the pushers while the chrono is activated then unscrew them when you need to stop the chrono? I realize this is a stupid question so thank you in advance for any assistance you can offer. I am just trying to learn as much as i can before I purchase my SS Daytona.

GolfPunk · 28 January 2011, 06:06 PM

You can screw them back in, infact you are better off screwing them back if the Chrono is running for a long time, the screw in makes it 100% water tight

Andad · 28 January 2011, 06:18 PM

I leave my Daytona chrono running all the time when I am wearing it.

Just like having a big second hand.

With the pushers screwed in.

dalip · 28 January 2011, 07:55 PM

Quote:

Originally Posted by directioneng

I leave my Daytona chrono running all the time when I am wearing it.

Just like having a big second hand.

With the pushers screwed in.

+1

dddrees · 28 January 2011, 09:01 PM

Quote:

Originally Posted by directioneng

I leave my Daytona chrono running all the time when I am wearing it.

Just like having a big second hand.

With the pushers screwed in.

I've been told that that is hard on the movement to leave it running, is that true?

padi56 · 28 January 2011, 09:05 PM

Quote:

Originally Posted by dddrees

I've been told that that is hard on the movement to leave it running, is that true?

Its not a problem but perhaps power reserve would drop a couple of hours if off wrist.Myself just cannot see any point in running it 24/7 if you are not using it for timing, you have a sub second dial for precise setting.

dddrees · 28 January 2011, 09:07 PM

Quote:

Originally Posted by padi56

Its not a problem but perhaps power reserve would drop a couple of hours if off wrist.Myself just cannot see any point in running it 24/7 if you are not using it for timing, you have a sub second dial for precise setting.

Thanks Padi.

HL65 · 28 January 2011, 09:23 PM

Quote:

Originally Posted by padi56

Its not a problem but perhaps power reserve would drop a couple of hours if off wrist.Myself just cannot see any point in running it 24/7 if you are not using it for timing, you have a sub second dial for precise setting.

X2! And no it will not hurt the watch!!

Boadicea · 28 January 2011, 11:20 PM

Quote:

Originally Posted by padi56

Its not a problem but perhaps power reserve would drop a couple of hours if off wrist.Myself just cannot see any point in running it 24/7 if you are not using it for timing, you have a sub second dial for precise setting.

I'm with you on this. While it is fine to leave it ruinning, you're just wearing out parts that don't need to be in use. I leave mine off but run it for a full 24+ hours every now and again just to keep the oils/gears moving.

conrail · 28 January 2011, 11:53 PM

Quote:

Originally Posted by Boadicea

I'm with you on this. While it is fine to leave it ruinning, you're just wearing out parts that don't need to be in use. I leave mine off but run it for a full 24+ hours every now and again just to keep the oils/gears moving.

Thats exactly what I do - give it a full once-round every now and then.

Tools · 29 January 2011, 02:32 AM

The screw downs are just a couple of threaded rings. They are only there for decoration and to give you some level of security so you won't accidentily press them if you don't want to...such as in the water.. You can leave them in any position you want - it doesn't matter.

They have nothing to do with water resistance except to keep you from pressint them in the water... The Daytona is completely waterproof to depth whether they are screwed down or not

ratty · 29 January 2011, 03:13 AM

Would leaving the chrono running all of the time affect the watch's accuracy over time at all?

Tools · 29 January 2011, 05:37 AM

Quote:

Originally Posted by ratty

Would leaving the chrono running all of the time affect the watch's accuracy over time at all?

Perhaps... One law in physics is that you cannot add work (the chrono) into a known baseline (the base movement) without consequence.. (you can't get something for nothing)

The Daytona is built with a large mainspring that should be able to keep the same pressure on the hairspring/balance wheel as long as the power reserve is within design parameters.. So, as long as you stay on the torque curve (isochronistic curve) as designed, any change may be hard to measure..

It is likely though that if the power level is reduced, the accuracy will suffer.. How much or if you would notice is hard to say....

Hydrographer · 29 January 2011, 05:56 AM

Quote:

Originally Posted by Tools

Perhaps... One law in physics is that you cannot add work (the chrono) into a known baseline (the base movement) without consequence.. (you can't get something for nothing)

The Daytona is built with a large mainspring that should be able to keep the same pressure on the hairspring/balance wheel as long as the power reserve is within design parameters.. So, as long as you stay on the torque curve (isochronistic curve) as designed, any change may be hard to measure..

It is likely though that if the power level is reduced, the accuracy will suffer.. How much or if you would notice is hard to say....

Larry, you really know your stuff. Can i ask what you do for a living? Engineer perhaps?

matt4hand · 29 January 2011, 06:47 AM

Quote:

Originally Posted by Hydrographer

Larry, you really know your stuff. Can i ask what you do for a living? Engineer perhaps?

I think he stayed at a Holiday Inn last night..

ratty · 29 January 2011, 07:10 AM

Quote:

Originally Posted by Tools

Perhaps... One law in physics is that you cannot add work (the chrono) into a known baseline (the base movement) without consequence.. (you can't get something for nothing)

The Daytona is built with a large mainspring that should be able to keep the same pressure on the hairspring/balance wheel as long as the power reserve is within design parameters.. So, as long as you stay on the torque curve (isochronistic curve) as designed, any change may be hard to measure..

It is likely though that if the power level is reduced, the accuracy will suffer.. How much or if you would notice is hard to say....

Do you think normal wearing of the watch will keep it within this curve or would it require manual winding as well?

bemik · 29 January 2011, 12:53 PM

I would imagine normal wearing should be sufficient.

BB83 · 29 January 2011, 01:50 PM

I just can't imagine leaving the chrono functions running all the time. I run them every once in a while for fun, but mostly don't use them.

bemik · 4 February 2011, 09:09 AM

I actually use chronograph quite often, so I normally keep the buttons unscrewed.
When I'm not using the chrono, I leave it to rest.

But I have seen some friends who prefer aligning the chrono hand with the second dial, to use it as the "BIG" second hand.

ersnyder · 4 February 2011, 09:14 AM

I use my chrono quite frequently for timing but never dreamed it was OK to leave them unscrewed. Makes sense to let it run for many hours every now and then but I never gave that any thought either. Gotta love TRF! A great source of knowledge!

nemo1 · 17 July 2011, 03:46 AM

Quote:

Originally Posted by dddrees

I've been told that that is hard on the movement to leave it running, is that true?

That is not true. In fact, for the in-house movement Daytonas (4130 movement) it's just the opposite.

Thats because the movement features a vertical clutch (these movements are only used in Seiko chronographs and in the 4130 Daytonas).

With a vertical clutch the clutch actually slips when the chronograph is stopped, potentially causing this part to wear more when the chronograph is stopped than when it is running.

Cheers ^^

landroverking · 17 July 2011, 04:10 AM

Do any of you people who need and use a chronograh wish that those who don't would pass on buying them? Or is it just me? I guess the same could be said for the other Rolex tool watches.

ManUtd · 17 July 2011, 04:30 AM

Quote:

Originally Posted by nemo1

That is not true. In fact, for the in-house movement Daytonas (4130 movement) it's just the opposite.

Thats because the movement features a vertical clutch (these movements are only used in Seiko chronographs and in the 4130 Daytonas).

With a vertical clutch the clutch actually slips when the chronograph is stopped, potentially causing this part to wear more when the chronograph is stopped than when it is running.

Cheers ^^

That's good to know. I've been running my Daytona's chrono for a while now.

kkwn98 · 18 July 2011, 03:41 AM

Quote:

Originally Posted by nemo1

That is not true. In fact, for the in-house movement Daytonas (4130 movement) it's just the opposite.

Thats because the movement features a vertical clutch (these movements are only used in Seiko chronographs and in the 4130 Daytonas).

With a vertical clutch the clutch actually slips when the chronograph is stopped, potentially causing this part to wear more when the chronograph is stopped than when it is running.

Cheers ^^

Well, also in the F. Piguet calibre 1185 and probably some others also.

28 January 2011, 05:42 PM	#1
hoops10 Banned Join Date: Jan 2011 Location: USA Posts: 325	SS Daytona chronograph function I have a question regarding the chrono function on the Daytona. I know that the pushers have to be unscrewed to activate the chronograph function. My question is after the chronograph has been activated do you need to leave the plungers unscrewed while the chronograph is running or can you screw down the pushers while the chrono is activated then unscrew them when you need to stop the chrono? I realize this is a stupid question so thank you in advance for any assistance you can offer. I am just trying to learn as much as i can before I purchase my SS Daytona.

28 January 2011, 06:06 PM	#2
GolfPunk "TRF" Member Join Date: Dec 2010 Real Name: Gary Location: UK Watch: WG Daytona Posts: 4,398	You can screw them back in, infact you are better off screwing them back if the Chrono is running for a long time, the screw in makes it 100% water tight __________________ ♕ Rolex Daytona White Gold 116509 (Ghost) ♕

28 January 2011, 06:18 PM	#3
Andad 2024 SubLV41 Pledge Member Join Date: Nov 2006 Real Name: Eddie Location: Australia Watch: A few. Posts: 37,533	I leave my Daytona chrono running all the time when I am wearing it. Just like having a big second hand. With the pushers screwed in. __________________ E

29 January 2011, 02:32 AM	#11
Tools TRF Moderator & 2024 SubLV41 Patron Join Date: May 2007 Real Name: Larry Location: Mojave Desert Watch: GMT's Posts: 43,514	The screw downs are just a couple of threaded rings. They are only there for decoration and to give you some level of security so you won't accidentily press them if you don't want to...such as in the water.. You can leave them in any position you want - it doesn't matter. They have nothing to do with water resistance except to keep you from pressint them in the water... The Daytona is completely waterproof to depth whether they are screwed down or not __________________ (Chill ... It's just a watch Forum.....) NAWCC Member

29 January 2011, 12:53 PM	#17
bemik "TRF" Member Join Date: Dec 2010 Real Name: Tommy Location: Seoul, Korea Watch: 116520 Black Posts: 337	I would imagine normal wearing should be sufficient. __________________ Everything happens for a reason. But some things just happen.

29 January 2011, 03:13 AM	#12
ratty "TRF" Member Join Date: Sep 2010 Real Name: Graham Location: UK Watch: Daytonas and Subs Posts: 2,810	Would leaving the chrono running all of the time affect the watch's accuracy over time at all?

29 January 2011, 01:50 PM	#18
BB83 Member Join Date: Sep 2010 Location: USA Watch: Daytona Posts: 375	I just can't imagine leaving the chrono functions running all the time. I run them every once in a while for fun, but mostly don't use them.

4 February 2011, 09:09 AM	#19
bemik "TRF" Member Join Date: Dec 2010 Real Name: Tommy Location: Seoul, Korea Watch: 116520 Black Posts: 337	I actually use chronograph quite often, so I normally keep the buttons unscrewed. When I'm not using the chrono, I leave it to rest. But I have seen some friends who prefer aligning the chrono hand with the second dial, to use it as the "BIG" second hand. __________________ Everything happens for a reason. But some things just happen.

4 February 2011, 09:14 AM	#20
ersnyder 2024 Pledge Member Join Date: Jul 2009 Real Name: Eric Location: Long Beach CA USA Watch: Rolex Explorer II Posts: 4,102	I use my chrono quite frequently for timing but never dreamed it was OK to leave them unscrewed. Makes sense to let it run for many hours every now and then but I never gave that any thought either. Gotta love TRF! A great source of knowledge!

17 July 2011, 04:10 AM	#22
landroverking "TRF" Member Join Date: Dec 2008 Real Name: Jay Location: TEXAS Watch: Daytona Posts: 7,648	Do any of you people who need and use a chronograh wish that those who don't would pass on buying them? Or is it just me? I guess the same could be said for the other Rolex tool watches.

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