# My robotic club won't let you miss Source: https://www.youtube.com/watch?v=JQB8aNKyeao Recap page: https://rapidrecap.app/video/JQB8aNKyeao Generated: 2026-01-01T05:33:48.126+00:00 --- ## Quick Overview The creator successfully built an auto-aiming miniature golf club that uses motion tracking cameras (OptiTrack) and custom control software to accurately calculate and correct the putter face angle in real-time, allowing even an amateur to consistently sink putts based on the software's calculated aim. **Key Points:** - The project involved building a robotic putting aid attached to a standard putter shaft, featuring a motor, worm gear mechanism, and counterweight to actively correct the club face angle during the swing. - The system relies on an OptiTrack motion capture setup with 12 tracking cameras and custom software to determine the exact 6D pose of the club face. - The creator's initial mathematical model failed to match reality because it ignored the high inertia of the motor/gear assembly, causing the club face to overshoot the target angle during fast swings (00:51, 02:20). - The final successful configuration uses a counterweight attached to a second shaft, which rotates in the opposite direction of the club head's unwanted torque, effectively balancing the system (06:35). - The system achieves high precision, tracking the club face angle and position with a delay of only about 10 milliseconds (07:15). - The creator notes that despite the complexity, the final result is extremely rewarding, enabling consistent, accurate putting even when the user is blindfolded (03:33, 07:33, 10:04). ![Screenshot at 00:10: The creator unpacks the custom-built club attachment, which features a telescoping shaft and a head equipped with multiple reflective markers for motion tracking.](https://ss.rapidrecap.app/screens/JQB8aNKyeao/00-00-10.jpg) **Context:** The video documents the complex engineering process of creating an automated aiming mechanism for a miniature golf putter. The goal was to build a club that could use motion capture data to automatically adjust the putter face angle during the swing to compensate for human error or track a moving target. The creator spent considerable time designing and iterating on the mechanical linkage, motor control, and software algorithms to achieve high precision, dealing with issues like inertial forces and latency. ## Detailed Analysis The creator built an automated mini-golf club system to correct the putter face angle during a swing. This involved designing a mechanism attached to the putter shaft that uses a motor and worm gear to actively adjust the club face angle based on calculations derived from motion tracking data. The motion tracking uses an array of OptiTrack cameras (02:25) to track reflective markers placed on the custom club attachment (00:11). The initial challenge was successfully modeling the physics, as the creator's first mathematical attempts failed because they didn't account for the inertia of the motor and gear drive, which caused the club face to overshoot the intended angle during fast swings (02:54, 03:58). The solution involved adding a counterweight mechanism where a secondary component rotates in the opposite direction of the unwanted torque, effectively canceling out the inertial reaction forces (06:35). The system successfully tracked the club face angle and position with a latency of only about 10 milliseconds (07:15). The final demonstration shows the club successfully making adjustments to sink a putt directed toward a moving target (00:19, 07:09). The creator notes that the complexity of the mechanics (gear ratios, counterweights) was significant, but the result allows for highly accurate aiming, even enabling the user to putt blindfolded (03:33, 07:33). ### Project Goal & Setup - Build an auto-aiming mini-golf club using motion tracking - Setup involves a custom putter attachment with markers, an OptiTrack system, and a putt-putt course (00:01, 02:25). ### Mechanical Design & Iteration - Initial design suffered from inertial torques causing club face overshoot; solved by adding a counterweight mechanism that rotates in the opposite direction of the unwanted torque (02:54, 06:35). ### Control System & Software - Utilizes custom software (Club Ctrl) to process high-speed tracking data (240 Hz) from the cameras to calculate the necessary motor correction commands (04:50, 07:25, 13:05). ### Final Test & Result - The system successfully corrects the swing path in real-time, demonstrated by putting a ball toward a moving target (01:55, 07:08, 17:16). ### Sponsor Message - Brilliant is sponsoring the video, offering interactive lessons in math, science, and coding to help users learn complex concepts like geometry and programming (23:41). ![Screenshot at 00:04: Woman practicing putting on the custom mini-golf course setup.](https://ss.rapidrecap.app/screens/JQB8aNKyeao/00-00-04.jpg) ![Screenshot at 00:10: The custom club attachment, featuring multiple motion tracking markers, secured inside its protective case.](https://ss.rapidrecap.app/screens/JQB8aNKyeao/00-00-10.jpg) ![Screenshot at 03:24: Close-up demonstration of the worm gear mechanism used to control the club face angle.](https://ss.rapidrecap.app/screens/JQB8aNKyeao/00-03-24.jpg) ![Screenshot at 07:47: Close-up of the articulated mechanism showing the club head's counterweight system and the two opposing gears.](https://ss.rapidrecap.app/screens/JQB8aNKyeao/00-07-47.jpg) ![Screenshot at 11:13: A diagram illustrating how the club face is supposed to move \(straight line\) versus how it actually moves \(curved trajectory\) due to errors.](https://ss.rapidrecap.app/screens/JQB8aNKyeao/00-11-13.jpg)