A trapezoidal track locomotion mechanism powered by TT motors requires printing 20 small wheels, which are securely fastened using M3×25 screws and nuts with washers. Additionally, four 7×20 springs with a wire diameter of 1 mm are needed for mounting the front wheel brackets, enabling the track plates to be kept taut. The track plates themselves are constructed by threading 1-mm iron wire through them; approximately 60 pieces are required on one side (though I’m not entirely sure of the exact number). The drive wheels can be mounted directly onto the TT motor shaft using M3×5 mm screws.
When purchasing TT motors, opt for coaxial models rather than those with split shafts, as the latter can cause misalignment and chain slippage in the drive wheels.