hacking accuracy ?

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  1. #1
    LTH
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    hacking accuracy ?

    I have noticed something strange with my Citizen NY2300 (miyota 6200), as any automatic it runs a little bit on a very regular +7s/day (I log the deltas with excel) so from time to time I have to move the hands backward.
    If I only move the hands backward, the watch runs quicker, irregularly, from +10 to +25s/day ! I discovered that if I move the hands backward but much more than necessary, at least 10 minutes, then slowly forward to reach the wanted time, the watch is as accurate as before !!!

    I have done this 3 times, over a 4 weeks pediod.

    any explanation ?
    Swatch Sistem 51 Arrow (custom bracelet), Bulova Snorkel 96B209, Seiko SSA174K1 "unicorn" 4R37, Seiko SKA465P1 Kinetic 5M62-0CH0, Alpha Sundial Black, Seiko "SPØRK" SRP043K1, MQJ submariner, Casio WVA-430, Citizen diver NY2300-09EB, Seiko 5 SNXS77K (7S26) , Casio Protrek PRT-500 , Swatch Beat webmaster , vintage Seiko 5 (1972 defective) various Casio, Pulsar, Yonger&Bresson all anadigit and a Fossil WristPda:oops:

  2. #2
    Breitling Forum Moderator SnapIT's Avatar
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    Re: hacking accuracy ?

    Hi,
    I speculate that the poise of the escapement/balance wheel is disturbed (shortened) when you adjust it in only one direction. Its almost like a kink is induced into the hair spring thus quickening the period of the movement. What is actually happening is a job for a good watchmaker to discover.
    Cheers,
    SnapIT

    Seize the day, it ain't coming around again. . . .
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  3. #3
    Member JohnF's Avatar
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    Re: hacking accuracy ?

    Hi -

    To expand on this, I think you have perhaps two problems. The poise could be disturbed by setting the hands if the geartrain is sticking, putting pressure on the smooth working of the escapement/balancewheel combo and interrupting the movement. Normally this should not be a problem, with the gear train moving smoothly, but if there is dirt/damage in the gear train, it will seize briefly, resulting in unusual force at the escapement, which could explain the behavior: short-termed irregularity that settles back to the normal deviance.

    Either the watch gets worked on or you live with it.

    JohnF
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  5. #4
    LTH
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    Re: hacking accuracy ?

    ok, I live with it thanks !
    Swatch Sistem 51 Arrow (custom bracelet), Bulova Snorkel 96B209, Seiko SSA174K1 "unicorn" 4R37, Seiko SKA465P1 Kinetic 5M62-0CH0, Alpha Sundial Black, Seiko "SPØRK" SRP043K1, MQJ submariner, Casio WVA-430, Citizen diver NY2300-09EB, Seiko 5 SNXS77K (7S26) , Casio Protrek PRT-500 , Swatch Beat webmaster , vintage Seiko 5 (1972 defective) various Casio, Pulsar, Yonger&Bresson all anadigit and a Fossil WristPda:oops:

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