Cubic Cam-Law, Motion-Law

Cubic : is a 'Polynomial' Motion-Law. A different name is Constant Jerk


Segment-Editor AND Blend-Point Editor

CAN specify the:

Position at the START of the segment.
Velocity at the START of the segment.

The Position motion-value usually flows from the Previous-Segment to the START of the segment.

CAN specify the:

Position at the END of the segment.
Velocity at the END of the segment.

CANNOT specify the:

Acceleration at the START and the END of the segment.
Jerk at the START and the END of the segment.

MotionLaw-Cubic-1

Cubic from '0' to '1'

In the image, the Blend-Point values at the START and END are:

Position: 0 ; 1mm
Velocity: 0 ; 0mm/sec
Acceleration: Undefinable
Jerk: Undefinable

Cv = 1.5

Ca = ±6

Cj  = 12

Application Note

Any application where you must have a Constant Jerk [acceleration changing at a constant rate].

Tutorial and Reference Help Files for MechDesigner and MotionDesigner 13.2 + © Machine, Mechanism, Motion and Cam Design Software by PSMotion Ltd