hexagon logo
Register Sign in
  • Replies 7 replies
  • Subscribers 221 subscribers
  • Views 123 views
  • Users 0 members are here
Options
Related

need help with freeform scan

cappy6124
Hi all,

I'm having a bit of a problem w/ a freeform scan, I have a semi cylindrical surface that i'm trying to scan(xyplane). I can't use a section scan b/c the surface is also semi-circular in the yz plane and is not very thick, section scan just won't fit. so, when i make the scan all of the points are where they should be the scan looks good but it's trying to scan from the inside of the part instead of the outside, all of the hit vectors are in the wrong direction. i've gone through and manually changed all of the hit vectors to the correct direction but the initial hit vector still wants to measure from the inside of the part, which is solid.

anyone have any ideas?

also let me know if you need any clarification...




pc-dmis cad++ 2010 mr1
Parents
  • Check the vectors in PCDMIS. . . . Edit-> graphics display window -> cad vectors . . . Click the surface in question and look for the green arrow. . . If it is incorrect you can hit fix and pcdmis will try to guess if it should be flipped or not, or you can click flip if pcdmis guesses wrong. . . . Be careful though because if you flip one to make it correct then click another surface and flip that one without deselecting the first one, you will flip it back to the wrong direction again. . .

    I've never, not once, had to do anything, either in Pcdmis or in a cad package to "flip" the vectors of the surfaces to get Pcdmis to select the correct vector for measurement. Pcdmis will select the vector depending on the PROBE vector you are using. Pcdmis (in this one aspect) is actually quite intelligent. It will pick the vector that most closes opposes the probe vector you are using. So, I've never had a problem with this. The ONLY time I've had any issue even close to this was when generating the path and there was too much 'gap' between surface patches and too small of a tolerance for 'find' and then Pcdmis will go down the surface, then turn around and go up the back side of the same surface.
Reply
  • Check the vectors in PCDMIS. . . . Edit-> graphics display window -> cad vectors . . . Click the surface in question and look for the green arrow. . . If it is incorrect you can hit fix and pcdmis will try to guess if it should be flipped or not, or you can click flip if pcdmis guesses wrong. . . . Be careful though because if you flip one to make it correct then click another surface and flip that one without deselecting the first one, you will flip it back to the wrong direction again. . .

    I've never, not once, had to do anything, either in Pcdmis or in a cad package to "flip" the vectors of the surfaces to get Pcdmis to select the correct vector for measurement. Pcdmis will select the vector depending on the PROBE vector you are using. Pcdmis (in this one aspect) is actually quite intelligent. It will pick the vector that most closes opposes the probe vector you are using. So, I've never had a problem with this. The ONLY time I've had any issue even close to this was when generating the path and there was too much 'gap' between surface patches and too small of a tolerance for 'find' and then Pcdmis will go down the surface, then turn around and go up the back side of the same surface.
Children
No Data
© 2024 Hexagon AB and/or its subsidiaries. Privacy Policy | Cloud Services Agreement