Profile Scan

[[Me...]]

HI all, I'm trying to run a profile scan around the perimeter of this part in the picture. It starts off ok where the vector arrow is pointing then when it gets up to the red line for some reason it causes a problem and fails to continue in the scan? Any assistance would be grateful!

Profile Scan.JPG

[[Re...]]

Do all the points have their vectors in the correct direction? How many points in your curve? Could there be too many for your system?

[[Me...]]

I have posted the scan segment information if this helps?

Profile Scan2.JPG

[[Re...]]

This is probably not the problem, but I believe you should have 3 times the number of points set in your strategy for your curve.

[[Ow...]]

With the curve strategy open,right click on your screen and select show nominals and see if all the arrows (vectors) are pointing away from the part.
What type of scanning head are you using, and active Vast XT or a passive Vast XXT?
Check your clearance plane and make sure it covers the part.
With curve, you do want to have the filters turned on in the features evaluations and have at least 3 times mores points in the strategies "number of points". Looks like you have 999 points so, click the "number of points" ans change it to 3000. This is because when the filter is on, it will evaluate 3 points for each nominal vector and give you a better representation of the actual nominal.

[[Me...]]

Hi Owen , yes it seems like for some reason the vectors are in fact try to go in the wrong direction? The scanning head is a VAST XT. Clearance plane is correct. So how do I get those vector point to switch direction or can I delete those points or do I have to redo the curve? I don't know how it can pick the right vectors for the majority of the scan ?

Profile Scan3.JPG

[[Ow...]]

You might try auto-healing your cad model and try to recreate the scan, that would be the quickest.

If you're creating a 2-d curve and it doesn't work, try a 3-D curve by going to cad, creating features, select the point set tab at top of the menu that pops up and then under feature, select 3D curve. Here you can also create a 2-D curve off of the section (even though it says 3D, the model is sliced as 2D so it doesn't matter) and this wil usually create a better looking curve (for some reason) with more options to modify it. Once you have selected the section, click create to see what the nominals look like and if ok, select create feature and your done. You can set the space amount you want the points distributed from each other by selecting distance in the "grid length" and the edge distance I usually keep at 0.1mm.

If that doesn't work, you can change the vector direction. open up the curve and select the down arrow to show your points and then, look at the points on the screen that you want to invert and select each point while holding down the control key and once you have them all selected, right click and select 'invert vectors.

Invert Curve Vectors.jpg

[[Me...]]

Thank you for your assistance, Owen. I deleted that scan then healed the CAD, then constructed the curve again and picked the elements put way more points in and it created the scan line with all the vectors pointing inwards, I then selected all the individual points and reversed them all and it seem to work perfectly! Thanks again.

[[Ow...]]

Glad to help Anthony.
Checking a huge volume of one part to analyze variation so, I had the time to answer a few more than usual.