Configure Power Source dialog-box

To calculate forces correctly, you must 'Configure the Power Source' correctly.

We use the Configure Power Source dialog to make sure the correct element [for example, a Part] transfers the 'power' to each degree-of-freedom in a kinematic-chain.

Power Source elements can be:

Motors at Joints (Linear or Rotary)
Cams provide power to cam-followers

Special Cases of 'Configure the Power Source'

In MechDesigner, it is possible that the model has more Parts than the real-world application.

For example: We use 'Piggyback Sliders' to plan and define the planar motion of a point on the Mechanism-Plane. We then add a Dyad between the Sliders and the Base-Part. The two Parts in a Dyad might represent the two links of a planar robot.  In this case, the piggyback sliders are not needed in the 'real-world'.

When this is the case, you MUST remodel the mechanism without the Piggyback Sliders. You must then define the motions again for the Parts that will actually be driven, and then give the Power Source directly to these Parts and Joints.  There are MechDesigner 'tricks' that you can use to create the motions of the new mechanism. Please email for details.

tog_minusHow to open the Configure Power Source dialog-box


1s-redThe red square must show around the Kinematic-chain icon before you right-click

2.Use ALT+P on your keyboard

- or -

2.Right-Click the kinematic-chain
3.Click Configure Power Source contextual menu.

The Configure Power Source dialog-box opens.

Configure Power Source for a Kinematic-Chain

There are two tabs in the dialog-box:

Motion-Dimensions and Joints tab
Configure Force Vector colours tab
tog_minusMotion-Dimension and Joints tab


Motion Dimensions

Motion-Dimensions box:

1.Click a Motion-Dimension in the box

The Motion-Dimension you select shows in the read-only Selected Motion-Dimension box, below.

The icon, to the left of the box, matches the Motion-Dimension that you select as a Motion-Dimension.

Possible Motor Elements:

When you select a Motion-Dimension, MechDesigner shows in the 'Possible Motor Elements' box those elements that can drive the Motion-Dimension.

Possible Motor Elements may include Joints, or Cams or  Springs or any combination of these elements.

2.Click a Possible Motor Elements in the list box

The Motor Element you select shows in the read-only Selected Motor Element box, below.

The icon, to the left of the box, matches the Joint, Spring or Cam that you select as a Possible Motor Element.

See Also: Tutorial 13: Use Forces

If the Kinematic-Chain has two or more Motion-Parts - because it has two or more degrees-of-freedom for example - then you must choose the Motor Element for each Motion Dimension.

tog_minusConfigure Force Vector Colors tab


Use this tab to customize the display of Force Vectors that are in the graphic-area.

When you show Force Vectors, you can, for each Part:

Change the colour of each Part-Outline and Force Vector
Show or hide the Force Vector on the Element
Display Force Vector
othrough the Joint,
oas a Polygon of Forces
ouse the two options above
oor not to show the Force Vectors

Help Files for MechDesigner and MotionDesigner 11.1 + © Machine, Mechanism, Motion and Cam Design Software by PSMotion Ltd