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PolyWorks Discussion => General Discussion => Topic started by: ktw101 on July 04, 2013, 02:52:19 PM

Title: How to compare 2 different scans
Post by: ktw101 on July 04, 2013, 02:52:19 PM
Hello, I'm brand new to this site as well as to the polyworks software. I went through the 1 week training at innovmetric. I can do basic comparisons with a Cad model and a scan.

But what I was wondering is how can I compare a scan with another scan of the same part?

I work in R&D and we will scan our parts before and after certain tests (temp change, durability, vibration, etc). 

Any help will be greatly appreciated.
Title: Re: How to compare 2 different scans
Post by: jrayself on July 05, 2013, 09:54:27 PM
That option exists under the measure menu.
Title: Re: How to compare 2 different scans
Post by: Jeff on July 08, 2013, 04:09:59 AM
You can also right click on the data object and go to edit and convert to reference object. Then you can use it just like you would cad.

Title: Re: How to compare 2 different scans
Post by: ktw101 on July 17, 2013, 04:19:25 AM
Thanks guys, so it looks like if I right click on the data object to convert to ref object, I need to convert my original scan into a mesh first?
Title: Re: How to compare 2 different scans
Post by: jrayself on July 17, 2013, 05:42:59 AM
Correct. You can't use a point cloud as a reference object.
Title: Re: How to compare 2 different scans
Post by: ktw101 on July 17, 2013, 07:13:46 AM
Thanks, I'll give that a shot.

Is it better to do the original scan in IMalign then to merge then to edit(to clean and fill holes) then import it in inspect when trying this type of comparison?
Title: Re: How to compare 2 different scans
Post by: jrayself on July 17, 2013, 03:24:19 PM
I've always preferred to scan and perform my alignments in IMInspect then export the PSL for meshing in IMAlign and IMMerge.

You CAN scan inside IMAlign, but each scan pass has to mesh as soon as you collect it. So a 30 minute scan will take 60 minutes. Where if you do your 30 minute scan in IMInspect then dump it into IMAlign, you can walk away or check your Facebook while it is processing for 30 minutes.

It's really all the same in the end, but I'd rather not hold the scanner for any longer than necessary.
Title: Re: How to compare 2 different scans
Post by: ktw101 on July 22, 2013, 06:55:30 AM
Thanks for all your help.
Title: Re: How to compare 2 different scans
Post by: cappleby1 on August 05, 2014, 09:21:53 AM
I also need to do this but the attachments to this post no longer work can you please post more information on how to do this?