Motion Simulation: Polyline Motor with Reference Point (3-D)

In this example the wheel is to be moved along the blue polyline - first without, and then with reference point specification.

Case 1: Without reference point

Proceed as follows:

• Create a new simulation

• Right-click the View control icon and deactivate the View control .

• Call the Polyline motor function (the part to be moved: Wheel; Polyline: the blue sketch; Direction: Polyline; Motion type: Rotate with polyline; No reference point; Velocity: 60 mm/sec).

Settings for Polyline motor

• Maximum simulation time: 9 s
• Calculate simultion

Video of simulation

As you can see in the video, the polyline motor starts at the start point of the polyline. All transformations are calculated as if the wheel was located in this position. As a result, there will be an unwanted movement before the wheel switches the direction.

Download sim_bsp9a.mp4

Case 2: With reference point

Here, use the same settings as in Case 1, with the difference that you use a reference point here, namely, the quad point at the bottom of the wheel as shown below:

The reference point is indicated by a small red sphere:

When you now recalculate the simulation, no unexpected movements will occur:

Video of simulation

Download sim_bsp9b.mp4

Simulations (3-D) • Motion Simulation/Physical Simulation (3-D) • Simulation: Examples (3-D)