Iterative Alignment Woes

[All Parts R Good]

Hello,

I am trying to iteratively align a part using a CAD model. I am taking 3 points off of the surface and then 2 studs. I select "Measure all Once", then level the 3 points, rotate about the 2 studs and call one the origin and I keep getting an "Iterative Alignment Error" message. What am I doing wrong? Can I not use studs? I think I have in the distant past. I am using PCDmis 4.1 on a Micro Xcel Machine. My OS is XP Professional. Any help in this matter would be greatly appreciated.

APRG

[bw_bob]

Are you sure your vectors are correct to the model ????

[EHines]

Are you taking surface hits for your studs? I have run into problems when I don't take the surface hits. Iterative alignment needs 3d features and a circle without surface points is only condisered a 2d feature.

[Matthew D. Hoedeman]

For any round feature, you absolutly have to have surface sample hits to make the feature have an absolute 3-D XYZ location. A stud, circle, slot and cylinder have an axis, but no set 3-D point in space.

[JamesMannes]

Take a look at this document...

HERE

...it may help you. Any further questions please ask.

[All Parts R Good]

I will add surface hits to the stud when the fixture/part returns. No sooner did I type in my original question, the QE came and took that part away and gave me something completely different. Oh well, whether it be when that part returns or another part requires the same set up I will be sure to add the surface points and try again. Thank you for all of your input and I will let you know if that resolves my issue.

APRG