How straight is a row of holes.

Plane level and origin Z
first circle origin X and Y
Last circle create line from first circle one to this hole
Alignment Plane level
rotate line Y about Z or X about Z (not sure how you got it laid out)
Origin Plane Z
Origin First hole X and Y
create your circles in between make sure each hole your "X" direction reads "0" in THEO
and "Y" direction reads 1.5 then the next hole 3 the next 4.5 etc.....THEO, or vise versa again unsure how this is lined up.
Then go back and run the program

I would make sure you created a 3D line. Also. For consistency, check all your holes at the same -Z- value. As a sanity check when completed you can also create a line from ALL of the circles and then use a straightness callout to see what that line looks like.

Thanks Kirbster. My Alignment looks OK with the Plane, Line, Point I have now, but I'll go back and check one of my previous Plane, Circle, Circle alignments per your notes. My "X" increments by 1.5 and my "Y" though ranges .639 at hole 1 to .561 at hole 71

Here is a snip of the current alignment.
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Hi Schlag,

I changed my Constructed Line to Circle dimensions from 2d to 3d and the results changed dramatically to more what I expect (a few thousandths off vs. 30+). The results did not change when I changed the constructed line from 2d to 3d. So was my main problem a 2d vs 3d issue?

Can you provide guidance when I would select 3d vs 2d for a constructed line or a dimension? I should recall this from training but do not recall an emphasis on this.

All the best to you guys and thanks again!

I'm not completely satisfied with your alignment. Where is this point?

2D adjust to an axis, 3D is Feature to Feature

Kirbster269,

The Point is on the Left/top edge of panel. Line is on the Front/top edge of panel. Plane is on the Top of panel.

For a dimension, 3D is used for a feature to feature dimension then?

For a constructed line, when should it be 3D and when 2D?

These a likely basic questions, but I do want to understand. Thanks for the help!

3D looks at the distance of centroid to centroid. Just, "how far apart are these 2 points in space?"

2D is workplane dependent. In the ZPLUS workplane, any deviation in Z is ignored. The measurement will happen perp/parallel to X/Y (as you select) when measuring the distance between 2 features.

There is a 2nd option for 2D distance, "To Feature". To use this, you must select your 2 features being measured, and then a 3rd feature to measure relative to (perp or parallel). This can be a plane or line (lines are line, cylinder, slot, cone, and circle**). You could create a line from hole 1 to hole 70, and use that as feature 3 to measure 2D distance from hole 1 to hole 70 perp/parallel to the line.

**I have no idea how a circle is used as a line, it's vector, like a cylinder? Not sure.

The help menu is pretty decent at answering some of these questions. Just open the Distance dialog window and hit F1.

Constructed lines depend on what you need, and are also workplane dependent. If your holes are (0,0,1) but at a 45 degree angle from X and you make a line in XPLUS or YPLUS, then your line will be parallel to X or Y, and .7071 times the length of hole 1 to hole 70.

He also wants to know if the holes are in a straight line.

Well the only reason, I'm not satisfied is you specifically stated the engineer wanted to know how straight the holes were, you are not doing that. Unless you misworded your original statement. If your basing this off a different alignment. Then no they probably aren't straight to an edge. But straight to themselves, leaving him/her scratching his/her head, probably making unnecessary changes.

VIEW ~ OTHER WINDOWS ~ QUICK START
Select ALIGNMENT, pick PLANE-HOLE-HOLE

Measure the plane on top of the part, measure the "left" hole, measure the "right" hole

You are now aligned level to the top, rotated to the line between the 2 holes, origin on the first hole and top (6 DOF)

Measure the holes in between the 'left' hole and the 'right' hole, report the XY of each.

This will tell you the spacing (X) and how far out of straight they are (Y)

Pretty simple.

That's what I said in the second post, and you get all the likes, LOL