top of page

Watch Winder

The 3D-printed watch winder is a custom-built device designed to keep automatic mechanical watches running when they are not being worn. Automatic watches rely on wrist movement to keep their internal rotor oscillating, which winds the mainspring. However, if left idle for too long, the watch unwinds and stops, requiring manual resetting.

To solve this, I built a watch winder that rotates the watch in alternating directions at regular intervals, simulating the natural wrist motion. The device is powered by a stepper motor controlled by an Arduino, ensuring precise and smooth rotation.

The casing and mount were entirely 3D-printed, allowing me to customize the design to fit various watch sizes. This project introduced me to motor control with Arduino, stepper motor drivers, and creating functional mechanical devices through 3D printing.

Step-by-Step Working

​

  1. 3D Modeling and Printing:
     

    • I designed the watch mount and casing using Fusion 360, creating a modular structure that houses the motor and securely holds the watch.

    • The mount was 3D-printed using PLA filament for durability and precision.

    • I added a circular rotating platform with a soft cushion to prevent scratching the watch.
       

  2. Motor and Electronics Setup:
     

    • The system uses a NEMA 17 stepper motor controlled by an A4988 stepper motor driver.

    • The motor was mounted onto the base, with a rotating shaft connected to the watch holder.

    • The motor driver receives signals from the Arduino Uno and regulates the power sent to the motor.
       

  3. Arduino Programming and Motion Control:
     

    • The Arduino Uno controls the stepper motor’s rotation direction and timing.

    • The winder rotates the watch in 10-second intervals:

      • Clockwise rotation for 10 seconds.

      • Pause for 2 seconds

      • Counterclockwise rotation for 10 seconds.

    • This alternating motion mimics natural wrist movements, ensuring even winding without over-tightening the mainspring.
       

  4. Power and Testing:

    • The system is powered by a 12V DC power supply, providing consistent torque to the motor.

I tested the winder with several automatic watches, confirming that it maintained their time accuracy even after days of inactivity.

bottom of page