Iterative question

[QS920]

Hello all
I have not used iterative, I did a search here but did not find what I was looking for.
When I import the model for this part the zero is somewhere off in space off of the part (assuming car body cad coordinate?) The question I have is, do I need to bring that zero to the part? (transform) before doing the Iterative alignment.
It not when would I type in the nominals for the datum targets listed on the print?
I'm pretty fuzzy on this type of alignment. https://www.pcdmisforum.com/image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw== https://www.pcdmisforum.com/image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==

Thanks in advance! Capture_model1.JPGCapture_model2.JPGCapture_example2.JPGCapture_example1.JPG

[brian.freeman]

No you don't need to transform the part to the 'Zero" origin point. That is the good thing about iterative alignment.
You just need to set up the part to get to all of the Datum Target Points.
Be sure that you get the machine plenty of clearance space to maneuver around the part.
Once you have the initial alignment; refine the alignment so that it will be as close to nominal as possible.
Some of my iterative alignments are complicated and they iterates about 4 -5 times before they start measuring other features.

[QS920]

Thank you for your response, would I do a manual alignment the same way as you explained or is this a DCC alignment your talking about.
Also do I need to type in the datum target coordinates from the above print at some point?

[derekvegeta]

I think you should be able to use iterative without translating your origin however translating your origin so its not off in space is a good practice in general. However, I've only done iterative alignments after a manual alignment which already translated my origins for me.

[brian.freeman]

I hate transforming the parts---I leave them in space so that when it comes time to export the iges or stp file out; I don't need to re-align the acft coordinates.

[derekvegeta]

That makes sense. I personally don't have a need to export my CAD, so that didn't occur to me

[Schlag]

When I do an iterative from carbody or something similar I will create a 0.0 point out in space that represents the 0.0 on the print.

[QS920]

Not sure I follow would you give me an example please?

[Schlag]

When I import my CAD my coordinate system is on " 0.0 " . If you cant do this in CAD you can transform your model in DMIS. If you have a print with datum targets, the nominal x-y-z- locations of those hit points used in the alignment will exactly match the target locations. If your "CAD" 0.0 is somewhere other than " print " 0.0, how would you verify that your datum targets are even in the right locations ?

[QS920]

Yes of course the cad is on zero, I guess I just wasn't understanding your reply, got it now.
Thanks