hexagon logo
Register Sign in
  • Replies 4 replies
  • Subscribers 221 subscribers
  • Views 69 views
  • Users 0 members are here
Options
Related

highest 2 points for b datum plane and highest 1 point for c datum plane

markoor99
Assuming this is an assignment sort of solution if not using Geotol. I like to use legacy so I can visually see what is going on and control everything myself instead of using Geotol where I have only a slight idea if its doing it correct or not. When I have 3 planes as a datum, I assume that when I label them A,B and C, that Geotol is taking the 3 highest A datums points for the plane, the 2 highest B datum points from the plane and the 1 highest C datum point from the plane for the alignment. Doing an alignment I use "Primary Datum" for the A datum plane. Out of 9 points, 4 of them are 0 and 3 of them are in the negatives. This tells me its working correctly. But for the B datum and C Datum, its taking the centroid for the alignment. So half the points positive and half negative. How do I get these planes to align off the highest points/point.

All planes are perpendicular to each other. Its an L bracket. Front of L is the A datum, bottom of L is the B datum and 1 side is the C datum. I'm using 2020 R2. Some times the b and c datums are tilted differently from part to part. So basically want to mimic pushing all 3 planes up against blocks. 321

I have minimal experience with assignments and such, be gentle. Slight smile
Parents


  • All planes are perpendicular to each other. Its an L bracket. Front of L is the A datum, bottom of L is the B datum and 1 side is the C datum. I'm using 2020 R2. Some times the b and c datums are tilted differently from part to part. So basically want to mimic pushing all 3 planes up against blocks. 321



    That is exactly what the Geometric Tolerance command does when you reference three planes as your datums. It maintains the theoretical orientation of each of the planes to each other and simulates contacting on the high points. If you want to reproduce that in an alignment then you would need to use the constructed primary datum plane, constructed secondary datum line and constructed tertiary datum point.



Reply


  • All planes are perpendicular to each other. Its an L bracket. Front of L is the A datum, bottom of L is the B datum and 1 side is the C datum. I'm using 2020 R2. Some times the b and c datums are tilted differently from part to part. So basically want to mimic pushing all 3 planes up against blocks. 321



    That is exactly what the Geometric Tolerance command does when you reference three planes as your datums. It maintains the theoretical orientation of each of the planes to each other and simulates contacting on the high points. If you want to reproduce that in an alignment then you would need to use the constructed primary datum plane, constructed secondary datum line and constructed tertiary datum point.



Children
  • in reply to Neil Challinor
    Thanks Neil. That's exactly what I did. And that's I what assumed Geotol was doing. The only reason I could never get the other way to work was that I didn't know I could pick a plane when using the secondary line construction. I thought i had to have a line of many points in order to select secondary line. Same with the C datum plane. For some reason I assumed I had to somehow extract those points. But Now I know.
© 2024 Hexagon AB and/or its subsidiaries. Privacy Policy | Cloud Services Agreement