4. How to calculate triangular and trapezoidal move profiles
Speed and acceleration are two fundamental aspects of any linear motion application. They affect the forces on the guide system, the torque required by the drive components, and in some cases, they immediately narrow the choice of guides and drives that can be considered. Case in point: if your application calls for 5 m/s maximum speed, a ball or lead screw is probably out of the question, and you’ll need to look at a belt, rack and pinion, or linear motor drive.
When designing and sizing a linear motion system, one of the first steps is to determine what type of move profile the application requires, and how that affects its maximum speed and acceleration. The two fundamental move profiles, on which even the most complex processes are based, are triangular and trapezoidal, so named because of the shape of their velocity-time graph.
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