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The winding sequence is pre-determined and pre-programmed in the MCU of the circuit board. Each manufacturer has its own “secret” recipe.
It’s a fact that there are so many automatic watches in the market now, major names and even new micro-brands included, and each uses different movements, winds in a specific way, also weighs different due to materials used in the casing and has different winding principles. To complicate matters some watches have a single barrel while some uses double-mainspring barrels; some even a quad. To even put more stress to winder manufacturers, some watches have an off-centered (ref. Chopard L.U.C. Tonneau) rotor.
So to make a “one-size-fits-all” watch winder, the manufacturers (most of them) decide to give “additional” turns per day. IMO, its using a brute-force method that will ensure all watches can be wound in the winder.
Winding Sequence
As mentioned a few threads back, the hypothetical example of the winding sequence resulted in XXXX turns per day. The same TPD can also be achieved by changing the start/stop times and the motor’s rpm. But ultimately the result is the same high TPD.
But why that high TPD is selected?
I can only think of one reason… to suit ANY and ALL watches!
TPD
There are a few websites that display a database of Watches & TPDs. These companies have done this for a purpose. It’s not so much of a marketing gimmick but to let users know what they are buying and indirectly how to care for their watches.
Motor RPM
The common rpm selected is between 5 to 10rpm. True manufacturers will do a research as this has correlation to the tilt-angle (and vice-versa) of the winder’s exterior design/structure. To know more about this, please refer to my post where I’ve given an external link.
To simply put it, if the rpm is too slow, the oil viscosity may (may not) hold back the rotor as such they don’t rotate. If it’s too fast, centrifugal force takes over and the rotor turns together with the watch.
Watch Rotors
While ETA movements have a “centered” rotor, some companies like Chopard uses their in-house movement that adopts an off-centered Micro-LUC rotor which is a small 3.3mm thick piece of metal that winds bi-directionally the twin barrels inside the movement.
In short, it’s better to know what your watches need and to buy a winder for it. Not the other way round.
Just my 2cents.
It’s a fact that there are so many automatic watches in the market now, major names and even new micro-brands included, and each uses different movements, winds in a specific way, also weighs different due to materials used in the casing and has different winding principles. To complicate matters some watches have a single barrel while some uses double-mainspring barrels; some even a quad. To even put more stress to winder manufacturers, some watches have an off-centered (ref. Chopard L.U.C. Tonneau) rotor.
So to make a “one-size-fits-all” watch winder, the manufacturers (most of them) decide to give “additional” turns per day. IMO, its using a brute-force method that will ensure all watches can be wound in the winder.
Winding Sequence
As mentioned a few threads back, the hypothetical example of the winding sequence resulted in XXXX turns per day. The same TPD can also be achieved by changing the start/stop times and the motor’s rpm. But ultimately the result is the same high TPD.
But why that high TPD is selected?
I can only think of one reason… to suit ANY and ALL watches!
TPD
There are a few websites that display a database of Watches & TPDs. These companies have done this for a purpose. It’s not so much of a marketing gimmick but to let users know what they are buying and indirectly how to care for their watches.
Motor RPM
The common rpm selected is between 5 to 10rpm. True manufacturers will do a research as this has correlation to the tilt-angle (and vice-versa) of the winder’s exterior design/structure. To know more about this, please refer to my post where I’ve given an external link.
To simply put it, if the rpm is too slow, the oil viscosity may (may not) hold back the rotor as such they don’t rotate. If it’s too fast, centrifugal force takes over and the rotor turns together with the watch.
Watch Rotors
While ETA movements have a “centered” rotor, some companies like Chopard uses their in-house movement that adopts an off-centered Micro-LUC rotor which is a small 3.3mm thick piece of metal that winds bi-directionally the twin barrels inside the movement.
In short, it’s better to know what your watches need and to buy a winder for it. Not the other way round.
Just my 2cents.
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