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Monday, May 17, 2010

Wind One Watch, Stress-test the Other

There seems to be a feature on some watch winders that puzzles me. It’s called “Fast Winding”. On some others it’s called “Quick-wind” while another says it’s an “Express Continuous mode”.


Intended Purpose
The maker states that (for some reason), the user wants to wear a particular watch within a short period. Once set, the winder will wind your watch continuously up to 3 hours.


TPD Provided
Assume it rotates clockwise for 30 minutes, pauses for 5 minutes, then rotates counter-clockwise for another 30 minutes and pauses again for 5 minutes before repeating the sequence. What would the total TPD be after 3 hours?


CW 30 minutes x 5rpm = 150 turns x 2.57 = 385.7


Pause 5 minutes

CCW 30 minutes x 5rpm = 150 turns x 2.57 = 385.7

Pause 5 minutes

Cycle time 70 minutes

Note: 180min (3hrs) / 70min = 2.57cycles



The above sequence gives the watch about 771TPD within 3 hours.

So let’s say, the user wants to wear a wound-down watch for a business meeting later that day. The watch winder has been maintaining his two other watches. So he removes Watch A and places the wound-down watch in its place. He then sets the winder on a “Quick-wind mode”. Watch B cannot be removed because the turntable needs to be “balanced” while rotating. So this means Watch B would also receive the extra TPD added to the rotations already achieved. That, I believe, is putting undue stress to this watch.


Do note that this watch holder needs two watches to be in equilibrium, so the best alternative is to put a non-auto watch in place.

Whatever and however, in my opinion, this mode, no matter how “Unique”, is totally unnecessary.

Quick-wind cycles would fit turntables with a single watch rather than turntables with two watches.

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posted at 2:16 AM by ten10


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