To determine the correct rotation for your automatic watch on a winder, you should first check the watch's manual or the manufacturer's website for its specific winding direction and Turns Per Day (TPD) requirements. If the information isn't available, you can use a trial-and-error method by starting with the bidirectional setting and the lowest TPD, then observing if the watch keeps accurate time over two days. If the watch runs behind, gradually increase the TPD, and if the time is still incorrect, try the single-direction settings (clockwise or counterclockwise).
1. Find Your Watch's Specific Winding Requirements
- Check the Manual or Manufacturer's Website: The most reliable method is to consult your watch's user manual or visit the manufacturer's official website. Many brands provide a winding specifications database where you can find the exact TPD and rotation direction for your specific model.
2. Perform a Trial-and-Error Test
If you can't find the exact specifications, you can use a systematic approach:
- Manually Wind the Watch: Before placing your watch in the winder, manually wind the crown 20-30 times to give it some initial power. A winder cannot wind a completely stopped watch.
- Start with Bidirectional and Low TPD: Set the winder to the bidirectional (alternating clockwise and counterclockwise) rotation mode and the lowest TPD setting.
- Monitor Timekeeping: Place the watch in the winder, turn it on, and check its accuracy after approximately 48 hours. Most automatic watches have a 40-hour power reserve.
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Adjust if Needed:
- If the time is correct, you have found the right setting.
- If the watch is running behind, increase the TPD setting by one step and repeat the test.
- If the time is still incorrect after trying a higher TPD, switch the winder to clockwise-only rotation and repeat the test.
- If the time is still wrong, try the counterclockwise-only setting and repeat.
3. Understand Rotation Types
- Clockwise (CW): Suitable for watches designed to wind in this direction only.
- Counterclockwise (CCW): Ideal for watches that only wind with counterclockwise motion.
- Bidirectional (CW+CCW): The most common setting for modern automatic watches, which wind in both directions.
By following these steps, you can find the correct rotation setting for your watch winder, ensuring its optimal performance and longevity.
