Watch Winder

This is the Watch-Winder using the Nema 17 and 60x60x15 mm 12V fan. control by esp32 and A4988 or TMC2209. The link on YouTube for wire is: How to control Nema17 stepper motor with Esp32 (this is compatible with A4988 and TMC2209 for less noise) The code for esp32 (2rpm for more than 2 weeks running consecutive): watch-winder/src/main.cpp at master · QuangVuong501/watch-winder The code for esp32 (5rpm for overnight (about 8 hours)): watch-winder-5rpm/src/main.cpp at master · QuangVuong501/watch-winder-5rpm You can buy the nema17 here: Amazon.com: STEPPERONLINE 1 Pack Nema 17 Stepper Motor Bipolar 1.5A 42Ncm 42x42x38mm 1.8deg 4 Wires with 1m Cable and Connector : Industrial & Scientific 12v 6015 Fan: Amazon.com: ANVISION 60mm x 15mm DC 12V Brushless Cooling Fan, Dual Ball Bearing : Electronics Notes: if you need help just contact via email: [email protected] NO-SCREW REQUIRED The code is only compatible with the TMC2208, TMC2209 Design and Optimization of a Gravity-Driven Kinetic Energy Storage System for Automatic Timepieces using Micro-Stepping Electromagnetic Actuators. 1. Classical Mechanics: Force Resolution and Gravity (30-Degree Inclined Plane) At the heart of an automatic watch is the rotor (oscillating weight), which relies on gravity to rotate and wind the mainspring. By mounting the watch at a 30-degree angle (relative to the vertical plane), you have engineered a perfect balance of forces. Gravitational Force (P): P = m * g (Where "m" is the mass of the rotor and "g" is the gravitational acceleration of 9.81 m/s^2) Tangential Force (Pt): This is the force component that actually drives the rotor to spin. Pt = P * sin(alpha) At alpha = 30 degrees, Pt = 0.5 * P. This component is strong enough to easily overcome the static friction of the watch's winding gear train, allowing for smooth, efficient energy transfer. Normal Force (Pn): This is the force pressing directly against the rotor's axle. Pn = P * cos(alpha) Keeping the angle at 30 degrees inste