Point Position and Vector dialog-box

Use this dialog to:

Show Velocity and Acceleration Vectors of a Point in the graphic-area as you cycle the model
Find the exact position of a Point, with Mechanism Coordinates (read only).
Find and, if possible, edit the position of a Point with Part Coordinates. You can only edit its position when it does not have any other constraints.

[You do not need to open the Part-Editor when you edit the position of a Point with this dialog.

tog_minus        To open the Point Position and Vectors dialog box:

In the Selection-Window:

1.Click a Point one time in the graphic-area
2.Right-click the Point in the Selection-Window
3.Click 'Edit element' in the contextual menu

- or -

4.Double-click the Point in the Selection-Window

- or -

In the graphic-area:

1.Double-click a Point in the Mechanism-Editor

- or -

1.Double-click a Point in the Part-Editor

tog_minus        Show or Hide Velocity and Acceleration Vectors

VelocityAccelerationVectors

 

 

Dialog-R10-PointDisplay-Vecotrs

Velocity and Acceleration Vector check-boxes

The Velocity and Acceleration Vectors:

Start at the Point
Are proportional in length to their instantaneous velocity and acceleration value
The values of the velocity and acceleration show at the end of each vector
Are Blue for Velocity, Red for Acceleration [default colours]

To see the vectors:

The Point must be a child to a kinematically-defined Part
The Point must move

VelocityAccelerationVectors

Buttons to increase or decrease the scale of the vectors in the graphic area.

Buttons to increase or decrease the scale of the vectors in the graphic area.

 

 

 

 

To change the scale and length of the vectors, in the Feedback-Area:

Click the up or down buttons below Velocity
Click the up or down button below Accel (Acceleration)

Dialog-R10-PointDisplay-MechCoords

Point Coordinates on the Mechanism Plane.

The X, Y and Z–coordinate boxes are Read Only.


BasePart-OriginThe Origin [0,0] of the Mechanism Plane is at the small X– and Y–axes in the Base-Part.

Dialog-R13-PointPosDis-PointCoord

 

Two States of Point-Coordinates check-box

Lock and edit here
Edit in Part Editor

 

To edit the postilion of the Point using the data-boxes in this dialog,

1.Click the check-box 'Lock and Edit here'.

Notes

If you use this check-box, you will not be able to edit it in the Part-Editor.
This option over-rides any dimensions or constraints you have used in the Part-Editor.

 

For example, if the Point has a Coincident Constraint with a Line, it will not be possible to 'Lock and edit here'. This is because, the Coincident Constraint has removed one degree of freedom. This leaves the Point only one more degree-of-freedom. Thus, the Lock and edit here check-box cannot remove two more degrees-of-freedom from the Point.

Dialog-R13-PointPosDis-PointCoord2

To lock the position of the Point using the data-boxes in this dialog,

1.Click the check-box 'Edit in Part-Editor'.

The Point remains 'free' and you can edit it, as normal, in the Part-Editor.

If you use the Lock and Specify check box, you can:

Enter the Position of the Point along the X–axis of the Part
Enter the Position of the Point along the Y–axis of the Part
Points that are Locked

Locked Points

The y-axis of an Added-Part is along its CAD-Line. The y-axis of an Added-Part is at +90º to the CAD-Line, on the Part and Mechanism Plane.

The x- and y-axis of the Base-Part is the same as the X– and Y–axis of the Mechanism Plane.

If you edit the position of a Point, MechDesigner over-rides any constraints and dimensions given to the Point in the Part-Editor.

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