Lego Technic ADT 7 - Worm & Spring

A compilation of some more automatic gearboxes and stepper mechanism featuring opposing worm and spring design. Ratchet mechanisms are used to prevent backdrive when the secondary path disengages. Please turn on subtitles for some commentary. Related videos (Not to Scale):    • Lego Technic ADT 5 - Automatic Shifting wi...      • Lego Technic Stepper Mechanism (with Built...   Directional mechanisms (2in1 Bricking):    • Lego Technic One Way Gears | Level 1 - 5      • Lego Technic One-Direction Mechanisms | Le...   Related shifting mechanism (Technic Brick Power):    • Lego 2 Speed Automatic gearbox -  worm gea...   Related shifting mechanism (MaxBrix):    • Small Smooth Switching Lego Automatic Gearbox   Torque creation mechanism (Technic Brick Power):    • Lego Technic torque in practice - how to w...   0:00 Worm & Spring 1:11 Intro 1:44 Model 1 3:09 Model 2 4:50 Model 3 7:00 Display & Stats 8:10 Stepper 2.0 10:00 Stepper 2.1 11:45 Subscribe! Music in this video: 备兴天下beat