What is a Point-Cloud?

See also : Point-Cloud FB dialog-box


The term Point-Cloud is generally used to describe an array of coordinates that specify the shape of a 2D or 3D object.

Frequently, the shape is a cam that you want to reverse-engineer.

Point-Cloud FB

Use the Point-Cloud FB to:

import coordinate-data that represents the 2D shape or cam
fit a curve to the coordinate-data

The curve is mathematically smoother than the coordinates of the original data.

hmtoggle_plus1Application Note: To reverse-engineer a 2D-Cam.
1.Measure an old Cam; import the Point-Cloud and define it as a new curve with the Point-Cloud dialog-box.
2.Use the curve, in combination with a Magnetic-Joint and a Graph FB to find the motion of a Cam-Follower.
3.Use the tools in MotionDesigner to identify the motion of the Cam-Follower.
4.We would usually redefine the motion with an improved motion. We use the improved motion to re-calculate the 2D-Cam.
5.Finally, you can recalculate the cam-coordinates and export them for cam manufacture.

See also Globe-www Tutorial-21 Reverse Engineer a Cam


Add Point-Cloud FB

Toolbar :

Modelling FB toolbar

Add Point-Cloud FB

Point-Cloud FB

Menu :

Add menu > Add Point-Cloud FB

Dialog-box :

Point-Cloud dialog-box

What to do :

STEP 1: Add the Point-Cloud FB to a Part
1.Click Modelling FB toolbar > Add Point-Cloud FB

The Command-Manager shows one selection box. You must select a Part.

2.Click a Part in the graphic-area or the Assembly-Tree
3.Click OK-tiny-11-15 in the Command-Manager

The Point-Cloud FB is a child to the Part you select in the Command-Manager.

The Point-Cloud FB is in the graphic-area.

Edit :

STEP 2: Open the Point-Cloud FB dialog-box to:
Import the Point-Cloud
Fit a Curve to the Point-Cloud

See Point-Cloud FB dialog-box.

Video :

See YouTube: http://youtu.be/IME9Eb4mpQE

 

Tutorials and Reference Help Files for MechDesigner and MotionDesigner 14.2 + © Machine, Cam, Mechanism, and Motion Design Software by PSMotion Ltd