Creating points on multiple cross sections

[mx07423]

I'm new to polyworks and i'm laser scanning a clutch sheave.  I've been able to get the color mapping to work compairing to my iges file.  What I would also like to try is a run out dimension on the face of the sheave.  I created radial cross sections around the part.  I would like to specify a comparison point at a radial distance from center on the cross section.  The surface is at a angle so I don't think I can just make the point nominally and I would like to do all the cross sections at once if possible. It would be too much work to create a point on each cross section if I did it every few degrees.  I figure I could use the deviation from the comparison point and find max-min to get my run out.  Has anyone done this or know of a better way?  I'll try to attach a picture of the project to help explain what this is.

[Admin]

I had to pull out my GD&T book because it has been such a long time sine I have use runout myself.  I have never used the total runout in PolyWorks either.  My workaround at this point would be to create tons of comparison points like you said by importing them from a .txt file that I created from the CAD model outside of PolyWorks.  Sorry for the lack of help.

[Firefly]

Three ideas:

GD&T circularity
- create a plane at the height you want to measure (numerically, enter the z coordinate (x+y=0, normal z=1, x+y=0).
- crop the plane so it covers the outer area of the scan
- select data points to primitive (plane) without using an angle
- fit a circle into the points selected (without an angle)
- activate the circularity in feature controls/GD&T

Idea two and three are just methods to get the points:

I think thats what I would choose to get the points: creating calipers all around with the outside tip anchored. A fast way to get the calipers would be to create one (e.g. numerically) then duplicate it and rotate it around z (if you want I can write a macro for duplicate/rotate it every 0.1 degree or something like that).

The last one: Profile gauges - in V11 you can now create PG also radial, perhaps you can get the points like this.

[mx07423]

Ok those are good suggestions I'll work on trying them this week and let you know how it turns out.

[Admin]

Ok those are good suggestions I'll work on trying them this week and let you know how it turns out.

Any success with this?

[mx07423]

Unfortunately I got pulled off this project for now to do other parts, but I'll eventually get to try these things.