The tool has been coded in the software program OpenSCAD that can be downloaded and used for free. OpenSCAD is a CAD program that can generate 3D models from written code. These models can be output in different formats, including as a 3D printable STL file.
The code of the parametric file contains a number of variables that can be altered to yield a different actuator design:
These variables include:
The variable "Air_connector_length" sets the length of a piece of the actuator that is solid, where tubing for actuation can be inserted and fixed:
"TwistAngle" is used to rotate each rib a specific angle around its vertical axis. This will create an actuator that curls to the side:
The variable "Air_channel_pos_offset" is used to offset the air channel from the middle position:
Finally, the thickness of the walls of the mold itself can also be adjusted ("Mold_bottom_thickness", "Mold_wall_thickness").