An automatic watch is a special type of watch that can operate for a long time without needing a battery replacement. It uses energy from a mainspring, but to keep running continuously, the watch needs to be worn regularly. This ensures that the automatic winding mechanism is activated by the wearer’s wrist movement. Below are details about how automatic watches work and how to maintain them.
Why Does an Automatic Watches Stop Running When Not Worn?
Operating Principle:
- Energy Winding: The movement of an automatic watch needs to be wound every day. This energy can be wound manually (by turning the crown) or automatically through the movement of the wearer’s arm.
- Energy Depletion: When the watch uses up all the stored energy from the mainspring, it will stop running.
- Lubrication: When an automatic watch is not used for a long time, the lubricating oil in the movement can settle in one place and become less effective, leading to the watch stopping.
- Environmental Conditions: Storing the watch in high temperatures or humid environments can also cause it to stop. High humidity can cause the water-resistant seals to expand, allowing moisture to enter and cause rust and damage to internal components.
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How Long Can an Automatic Watch Be Left Unworn Before It Stops?
Some high-end brands like Longines, Tissot, and Mido have produced automatic watches with movements capable of longer energy reserves, ranging from 38 to 80 hours.
Energy Reserve Duration:
- Extended Time: You can leave the watch unworn for about 38 to 80 hours, and it will still run normally. Some high-end models can store energy for even longer, thanks to their advanced technology and high-quality movements.
Automatic Watch and Magnetism
Causes and Effects:
- Magnetization: Mechanical watches operate best in environments free of magnetic fields. If the mechanical parts become magnetized, the entire mechanism can be affected. Common causes include placing the watch near electronic devices with strong magnetic waves, such as speakers, photocopiers, refrigerators, and radios.
- Repair: Demagnetizing a watch is relatively simple. A technician will place the watch in a demagnetizer until the magnetic field is completely removed. This process needs to be done in three dimensions to ensure effectiveness.
Advice: When your automatic watch runs inaccurately, take it to a service center to check for magnetization.
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What to Do When an Automatic Watch Stops After Not Being Worn for Several Days?
Necessary Actions:
- Adjusting Time and Date: After not wearing the watch for an extended period, it will stop running. You just need to reset the time/date and wind the watch by turning the crown 10-15 times.
- Checking When It Stops: If the watch does not start or runs inaccurately after winding, there might be an issue. Do not attempt to repair it yourself; take it to a service center for professional inspection and repair.
Recommendations:
- Wear the watch regularly to ensure the movement operates smoothly and maintains accuracy.
Conclusion
An automatic watch is a mechanical masterpiece capable of long-term operation without a battery. However, to maintain optimal performance, it needs to be worn regularly and serviced properly. When encountering issues, seek assistance from reputable service centers for professional support.
