Helical Step Pulley Actuator

A pulley design for a micro metal gearmotor. Can be used to pull soft 1mm nylon cord with up to 30mm length of actuation. The entire assembly is designed to be glued together to make the entire design compact. Depending on the gearing of the motor, the design may be able to hold fairly heavy loads. The pulley can only wind effectively in one direction

The design works by winding a cord onto a pulley, which is driven by a motor or from a transmission. The rotational action causes the cord to w