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Perpendicular Distress

Flintstone
Good morning,

We are running a global silver machine with PCDMIS 2021 software. Today, we constructed an offset plane using auto feature vector points. We do this all the time. We also measured a cylinder, that is supposed to be perpendicular to the offset plane. When we asked for the perpendicularity of the offset plane to the cylinder in legacy, it told us the perpendicularity was perfect, all zeros. Obviously it wasn't but that's what the reports said. We tried to ask for the perpendicularity of the offset plane to the cylinder in geotol, and the machine wouldn't let us select the offset plane. It would let us select the cylinder, and report perpendicularity to the offset plane. I know, I know, we have done this successfully before. We must have finger fumbled something. Some setting somewhere. Any suggestions?

Thanks
  • 1st idea: Level to cylinder then click on the plane & then on cylinder (2nd feature is always the datum feature according to pc dmis help)
    2nd idea: Construct plane out of vector points & offset. Plane from plane.
    3rd idea: Construct plane out of those vector points & check its perpendicularity to the cylinder not the offset one.
  • Hmm,

    All good ideas, I think I actually already tried the second and the third idea. And... maybe in my frustration, I got loose with the facts. I've made lots of offset planes, but maybe I've never actually asked for perpendicularity of one of those to a cylinder. I'm uncertain now. Maybe we actually can't do that. Seems a shame if that's the case.

    Thanks for your help.
  • Perhaps it's not a regular feature that is why pc dmis won't do it. I tried to recreate this scenario on 2016 version just now & I'm getting zeros too. Unless there is a way to create generic plane out of those points but I'm not familiar with creating generic features besides the points. Maybe that method doesn't work either.
  • &

    The reason you get zeros with legacy is because offset planes do not have any hits. You would see the same for other constructed features such as mid-planes for example. This is also the reason why the Geometric Tolerance command will not let you dimension it. The difference is that with legacy, there is no error checking or warning, so it lets you do it but gives an incorrect answer.
  • I would try:
    -Probe point (autofeature)
    -Create GENERIC point that has the ".XYZIJK" values of the autofeature
    -Repeat above two steps for all of the required points
    -Construct a plane out of the generic points
    -Dimension as needed
  • in reply to Neil Challinor
    you don't specifically mention regular constructed planes, will it work with those (NOT an offset plane)?

    IF SO, can you use ACTUAL THICKNESS in the vector points to 'force' the nominals all to the same value, so it is just a constructed plane?
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