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Subject: Creating Points from Point Clouds

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Author Messages
PILENDA

20 Nov 2008 02:41 PM

I use point clouds generated by our touch point (not scanning) CMM to create part geometry.  The point clouds are brought in using Digitized Shape Editor, but I then must create a physical point for each dot on the cloud to be able to use it for creating geometry.

Is there some automated method of created a point for each dot in the cloud, or do I need to sit there and click on every single dot to manually create points?  Its very tedious when Ive got 1500 points...Thanks.

 

Paul

BUSTERCHOPS


20 Nov 2008 07:15 PM
Polyworks..:http://www.innovmetric.com/Manufacturing/what_inspector.aspx?lang=en
PILENDA

24 Nov 2008 09:12 AM

>>PolyWorks/Inspector™ is a powerful software solution that uses high-density point clouds and contact-probe datasets to control the quality of parts and tools at every phase of your manufacturing process. Today, major automotive and aeronautic OEMs and tier-one suppliers worldwide use PolyWorks/Inspector™ as their standard point cloud inspection software for prototype, first-article, manufactured, and assembled parts inspection

 

Not really what I was asking for.  Im well aware there are plenty of laser scanning devices out there that will provide me with a dense enough scan to build geometry off of (using QSR).

 

But we only use a touch point CMM.  Which provides me with basic information, like a cross section of points with which I can then draw a sketch off of.  See attached file V5R17.

So I have a couple hundred points to work with (usually), and its a real pain to sit there and click on each point in the cloud to assign a Catia point to it. 

 

What Im asking is if there is some way to have Catia automatically assign a Catia point to each value  of the point cloud.

This method is quite robost (if I could figure out a way to automate the point creation somehow).  I can take multiple clouds and average the x,y,z data across multiple parts using Excel, then dump all the data back into Catia and create a nominal model based on the measurements of 5 sample parts.  Then I can graphically show the tolerance range of the measured samples at any given measured point.  This is very handy for reverse engineering OEM parts.  Just need to figure out how I can create points in Catia for each value in point cloud. 

 

MBERRY

24 Nov 2008 09:35 AM
Pilenda,

In Digitized shape editor, there is an export command where you can create a ascii text file of x,y,z coordinates. If you know how to script, you could then create a pretty simple macro to create a point for each one in the text file...

Also, you mentioned that you have some points in excel...In that case, if you search in the programming forum there is a posting for a program someone wrote to import points defined in excel and create them in CATIA. Maybe that could help in that situation.

Otherwise, I don't know of any command in CATIA to directly make CATIA points from a point cloud.

Mike
WICHARD


24 Nov 2008 11:00 AM

Create the text file as Mike suggested, read the file into Excel and clean it up so your X, Y, and Z coordinates are in the A, B, and C columns. Go to Catia Help and search for ElementsFromExcel. That's where the Excel file is located to create the points in Catia.

 


CATIA V5 R18 SP6 - Dell Precision 690 - NVIDIA Quadro FX 4500 - XP 64bit 4GB RAM
PILENDA

24 Nov 2008 11:12 AM

Here is the link for the macro.  Just tried it and it worked well!  Thanks so much!!

 

http://www.coe.org/Collaboration/DiscussionForum/ActiveDiscussions/tabid/210/forumid/10/tpage/1/view/Topic/postid/113685/Default.aspx

 

 

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