Fig. 2: Overall dimension and working principles of the Dual Active Tilted Roller System.

a The overall dimension of DATRAS is showing its compactness. b (i) A translation motion is created by rotating the rollers in opposite direction with the same angular velocity. ii Rotating the rollers in the same direction with the same angular velocity makes a rotation motion of the guidewire. iii Rollers rotating with different angular velocities generate a helical motion of the guidewire.