GAM GPL series robotic planetary gearbox Using planetary spur gear Awesome Features: Backlash ≤ 0.1 arcmin (6 arcsec), 10x better than other precision gearboxes Best-in-the-market torsional rigidity for ≤ 0.6 arcmin lost motion Operates vibration-free for superior positional accuracy and control throughout the motion No adjustment required: Patented design guarantees backlash will not increase over the life time of the gearbox Operating life of 20,000 hours What are pros and cons? 國內減速機 Zhihu Gamweb