Iterative alignment and using XactMeasure

I'm sorry but I'm actually with everyone else on this one, what you've done isn't right.


Quick question - before you do anything else if you select your B and C cylinders off the CAD are the vectors square to an axis? (0,0,1 or 1,0,0 etc)

NOW that he has actually explained what he really needs to do (which was not done before).....

He still needs to do an iterative alignment simply because he does not have a planar "A" datum. BTW, if this "A" datum surface, BY DESIGN isn't a flat planar surface, then it SHOULD have datum targets called out, if not, the print is a failure because by definition, a datum is "planar", you can not point to a curvy surface and call the entire surface the "A" datum.

After doing the iterative alignment, which is 100% required due to the non-planar "A" datum, you simply construct a plane TO THE ALIGNMENT, while in the proper workplane for what it 'should' be level to, and use that in Xact.

Now, as for the issue with 'translating', there is no 'translating', but after the iterative alignment (which you MUST do), you simply set XYZ origins to what you want to be called "ABSOLUTE" zero. AFTER the iterative alignment, simply open the alignment utility again, select the feature that you want to be X0 and origin to it, same for Y and Z, ONLY set origins. DO NOT do CAD=PART, and "OK" out of the alignment.

Clear and concise info is required to get the answers you want.

And again, DROP the word "trihedron" in this, as I said, and will say again, it is ONLY a reference "object" to show you which way each axis points in the current alignment. It is only a 'lucky' thing that it shows up in the part IF the XYZ zero is on the part, otherwise, it is in the bottom-left corner of the screen. It will show at XYZ0 if that location is visable on the screen, otherwise it is NOT at XYZ zero.

I'm sorry but I'm actually with everyone else on this one, what you've done isn't right.


Quick question - before you do anything else if you select your B and C cylinders off the CAD are the vectors square to an axis? (0,0,1 or 1,0,0 etc)

NOW that he has actually explained what he really needs to do (which was not done before).....

He still needs to do an iterative alignment simply because he does not have a planar "A" datum. BTW, if this "A" datum surface, BY DESIGN isn't a flat planar surface, then it SHOULD have datum targets called out, if not, the print is a failure because by definition, a datum is "planar", you can not point to a curvy surface and call the entire surface the "A" datum.

After doing the iterative alignment, which is 100% required due to the non-planar "A" datum, you simply construct a plane TO THE ALIGNMENT, while in the proper workplane for what it 'should' be level to, and use that in Xact.

Now, as for the issue with 'translating', there is no 'translating', but after the iterative alignment (which you MUST do), you simply set XYZ origins to what you want to be called "ABSOLUTE" zero. AFTER the iterative alignment, simply open the alignment utility again, select the feature that you want to be X0 and origin to it, same for Y and Z, ONLY set origins. DO NOT do CAD=PART, and "OK" out of the alignment.

Clear and concise info is required to get the answers you want.

And again, DROP the word "trihedron" in this, as I said, and will say again, it is ONLY a reference "object" to show you which way each axis points in the current alignment. It is only a 'lucky' thing that it shows up in the part IF the XYZ zero is on the part, otherwise, it is in the bottom-left corner of the screen. It will show at XYZ0 if that location is visable on the screen, otherwise it is NOT at XYZ zero.