Trouble with CAD

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Trouble with CAD

    First of all I am running PCDMIS 2018 R2. Our design group created this CAD from an actual part we make. When I am creating my alignment something just does not want to work right. I have a 4-way (datum B) then my 2-way (datum C), where this goes wrong is my surface in Z axis. This should be zero but for some reason from Datum B to Datum C the surface drops a negative 7.8mm. For some miracle on the opposite (mirrored part) it corrected itself after spending six hours working on it. At the beginning I have transformed the 4-way to 0,0,0 but this seems not to work. I have tried just origin to 4-way (X,Y,Z = 0) then continue as follows rotating between the two datum's then taking a point for a three point plan but this does not work; it shows the surface on datum C as -7.8mm in Z. It just will not snap into place like it should and I do not have six to eight hours to play with it. I even went as far as using 2017 R2 but it seems it has something to do with the CAD model because it will not work in it as well. Any ideas????????????????????????????

  • #2
    Can you please post your code & like a snip of your print or a pic of your model or something? I'm really struggling to visualize this one
    SF7107(PCD), SF454(PCD), 152614(Quindos), 9159(Quindos), 7107(Quindos), B&S Manual, M&M Gear Checker

    Comment


    • #3
      Stupid question time - do the theoreticals match your alignment? What I mean is, are you measuring something that has theo XYZs of <0,0,7.8> but making it <0,0,0>?

      Alternately, are you touching off the part with the Find Nominals turned on?
      Last edited by RandomJerk; 07-29-2019, 10:14 AM. Reason: wrong word

      Comment


      • #4
        Have you tried rebooting ? Seriously though... Dump the cad assembly and bring it back in ?

        Comment

        Related Topics

        Collapse

        • bsacmm
          Alignment troubles!!!!!
          by bsacmm
          I am almost embarassed to ask this. I have a part that must be checked in the free state and stay in car position. THis is a simple part but the datum...
          12-14-2009, 01:03 PM
        • Potato head
          Define a Datum
          by Potato head
          Do datums have a tolerance? If the primary datum has say .010 deviation along its surface, and my cmm picks up both the high and the low points of that...
          02-09-2007, 02:37 PM
        • jcall
          Primary Datum on a contoured face
          by jcall
          Hi All,

          I have a primary Datum (A) which is on 2 contoured surfaces (marked in red on image)

          I need to define Datum A in PCDMIS...
          06-30-2016, 11:21 PM
        • ClayOgre
          GD&T question
          by ClayOgre
          I have come across a number of prints where the datums are unmachined cast surfaces, and in a couple of cases, the datum was a single point on a cast...
          02-08-2008, 07:59 AM
        • Andy F.
          Datum Implications
          by Andy F.


          Can someone elaborate on this one? What if I have a part that is distorted and bowing and can not make perfect perpendicular planes on...
          06-05-2014, 01:44 PM
        Working...
        X