Extracting Points From Curve for Line

[[Sh...]]

I often use curves to establish a point cloud in which I recall feature points to create lines. This runs pretty smoothly about 75% of the time. The other 25% of the time I get the annoying purple highlight on the line and it can't recall the points. 

The solution so far has just been going back into "recall feature points" and redraw my box. 

Is there a way to stop this from happening?

[[Ma...]]

I am quite lost in translation and your problem, but we can solve that selection box.

I saw this behaviour whenever your measured points are outside of that box:

• your alignment is not stable or
• scanned area is further due machining or part deformation

Because i am dealing with forged parts, which are not straight and so on i am using this method:

1. Scan area in one element.
2. Make a bestfit alignment from that scan
3. Now use another element which will recall all scanned data and it's feature alignment will be that bestfit
4. Now you can use element where you want that selection box:
   1. Use recall measured points
   2. Select element from 3rd step
   3. Right mouse button and select "Add selection"
   4. From combobox select "Feature's alignment"
   5. Now fill XYZ of that selection box
   6. Your box will now move by that bestfit accordingly

[[Ri...]]

I've never been a fan of using the box tool for Recall Feature Points as it can easily break. Most of the time you need to manually change the size of it (usually the thickness of the box). 

I would strongly suggest you use Point # instead - it is more robust - also make sure Curve result points is checked - this will use the act to nom corrected points instead of the raw points (it also makes finding the correct point number much easier - just use the nominal point numbers 🙂 )