Tamiya 70256 Bipedal Walking Robot STEM Kit  [70256]

Tamiya 70256 Bipedal Walking Robot - Interactive STEM Build

The Tamiya 70256 Bipedal Walking Robot joins the STEM range as a tactile project for hobbyists curious about simple mechanical motion. The kit demonstrates weight transfer and walking action using a compact mechanical layout.

Movement Mechanism Explained

Built from resilient ABS plastic, this robot uses a specialised weight transfer unit to shift its center of gravity and walk. A low RPM type 130 motor powers the leg motion while the body rocks side to side, showing basic kinematics in action.

Build and Personalisation

Designed with snap-fit parts and screw connections, assembly is friendly for different skill levels. Legs and slides include pre-drilled holes to accept add-ons like universal shafts or bespoke parts. Expect about 120 to 180 minutes to complete the build, with a medium difficulty rating of 3 out of 5.

Speed Control and Terrain

With a gear ratio of 114.7:1 the unit moves at roughly 4.8 cm/s, suited to smooth floors. You can alter the gearbox angle to bias direction, use the leg limiters to adjust lean and stride, and fit the optional guide rod to help get around small obstacles.