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blingbling · 24 March 2010, 02:11 AM

Would leaving the chrono movement running all the time affect the accuracy of the real time on a Daytona?
I know it's prob just unnecessary wear and tear!

ParisDakarBmw · 24 March 2010, 02:23 AM

I would think the extra chrono features running would cause a minute amount of wear, and a small amount of friction to the gear train. This would hava a longterm impact on the springs, jewels, and gears. Of course, these functions are there to be used, but whenever a complication is added to the movement, there is added friction, and more energy used to turn the gears. How long to make an impact on the watch, who knows, but there is definately a differance in the two.

smallcandle · 24 March 2010, 02:25 AM

Leaving your chrono running won't effect the Daytona's timekeeping ability.

CPTL · 24 March 2010, 02:30 AM

On a related note, does COSC test the accuracy of all watch complications, or just timekeeping?

padi56 · 24 March 2010, 02:43 AM

Quote:

Originally Posted by CPTL

On a related note, does COSC test the accuracy of all watch complications, or just timekeeping?

No only the bare uncased movement is tested date-wheels winding rotor even hands and dial are removed.Special ones are fitted at COSC because of the vast amount of movements tested for Rolex,they have there own machine.The
movements are loaded into magazines like a machine gun.They are then all wound quite fast by a machine,that's why the winding rotors are removed.Movements are then tested in various position's temperatures all linked and photographed by time lapse photography for the duration of the test.Passed
ones get certified failed ones sent back to Rolex.Who then re-oil regulated and ship back to the COSC for re-testing.

Rikki · 24 March 2010, 08:47 AM

Also Daytona's are tested in chrono on mode full wind and then half wind. Then chrono mode off full wind then half wind. To check amplitudes and delta's in 10 positions aggregate. This is done to make sure chrono function doesn't have any inherent defects which would affect normal running of the watch. Rikki

HL65 · 24 March 2010, 08:55 AM

My only question would be why would anyone want to do that?

24 March 2010, 02:11 AM	#1
blingbling "TRF" Member Join Date: Feb 2010 Location: usa Posts: 18	Chronograph movement Would leaving the chrono movement running all the time affect the accuracy of the real time on a Daytona? I know it's prob just unnecessary wear and tear!

24 March 2010, 02:25 AM	#3
smallcandle "TRF" Member Join Date: Mar 2009 Real Name: Brian Location: Kansas Watch: 16610, Omega PO Posts: 1,898	Leaving your chrono running won't effect the Daytona's timekeeping ability. __________________ Things got out of control and I had to stab a clown...

24 March 2010, 02:30 AM	#4
CPTL "TRF" Member Join Date: Jul 2007 Real Name: Kevin Location: Texas on my mind Watch: Sub Date; SS/WG DJ Posts: 2,445	On a related note, does COSC test the accuracy of all watch complications, or just timekeeping? __________________ 16610 Submariner Date; D Serial 16234 DateJust SS with WG Fluted Bezel & Jubillee, White Roman Dial; F Serial 16570 Explorer II White Dial; M Serial And Hers: 78240 Mid-Size DateJust SS with Domed Bezel & Oyster, White Roman; D Serial

24 March 2010, 08:55 AM	#7
HL65 TRF Moderator & 2024 SubLV41 Patron Join Date: Dec 2007 Real Name: Ken Location: SW Florida Watch: One on my wrist. Posts: 63,993	My only question would be why would anyone want to do that? __________________ *SPEM SUCCESSUS ALIT*

24 March 2010, 02:23 AM	#2
ParisDakarBmw Banned Join Date: Dec 2009 Real Name: Paul Location: New Haven, CT Watch: 116610 Sub-C Posts: 6,552	I would think the extra chrono features running would cause a minute amount of wear, and a small amount of friction to the gear train. This would hava a longterm impact on the springs, jewels, and gears. Of course, these functions are there to be used, but whenever a complication is added to the movement, there is added friction, and more energy used to turn the gears. How long to make an impact on the watch, who knows, but there is definately a differance in the two.

24 March 2010, 08:47 AM	#6
Rikki TechXpert Join Date: Jun 2009 Real Name: Rik Dietel Location: Seminole Fla Watch: 5512 s/s Sub Posts: 1,818	Also Daytona's are tested in chrono on mode full wind and then half wind. Then chrono mode off full wind then half wind. To check amplitudes and delta's in 10 positions aggregate. This is done to make sure chrono function doesn't have any inherent defects which would affect normal running of the watch. Rikki

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