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Glossary Terms

Electric Linear Motion

Rodless screw and belt drive actuators, rod style screw and belt drive actuators, brushless servo motors and controls

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Load of constant magnitude acting in one direction that results in a nominal life (travel) of a linear motion actuator (component).

Moment Load

Rotational forces applied to the carrier equal to the linear force applied (weight) multiplied by the distance between the location of the force (center of gravity) and the surface center of the carrier. Typically expressed as yaw (Mz), pitch (Mx) and Roll (My). (See illustration with “LOAD”).

Maximum dynamic Load

Load of constant magnitude acting in one direction that results in a nominal life (travel) of a linear motion actuator (component).

Maximum static load

Maximum load of constant magnitude acting in one direction that a static actuator (component) can withstand without permanent deformation.

Microstepping

Type of drive that proportions the current in a step motor’s windings to provide intermediate positions between full steps. Advantages over full and half stepping include smoothness of rotation and higher position resolution.

Motion Profile

Definition of an objects position and velocity relationships in time during a move.