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.
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.
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.
Ok those are good suggestions I'll work on trying them this week and let you know how it turns out.
Quote from: mx07423 on April 07, 2009, 04:40:44 AM
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?
Unfortunately I got pulled off this project for now to do other parts, but I'll eventually get to try these things.