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Help aligning to a part (yes, another one of these posts)

Dsturgeon
Hey guys,

I've been trying to align to this part for the better part of today and I'm coming up with nothing.

Best fits using anywhere from 6 to 19 points end up with T values varying upwards of .100" across the side edges (the critical feature) when it's obviously not that far off.



There's pretty much nothing flat on the part that I can really use.

The drawing has pretty much nothing on it except hole diameter and a .010" Profile of the Surface call out.

Any help Dmis gurus?

Edit: Also I might not be using the Best Fit window totally correct. I've never really had any luck with it but I pretty much just open it, select all my points, make sure "3D" is selected, and hit okay.

Thanks
-Daniel
Parents
  • 1. Do you always have to manually align first with iteratives? Is there no readpoint equivalent?
    2. Do you always have to "Position probe above *insert feature* " after doing the manual alignment?w

    1. Yes if you don't have any form of fixture, then you do this once.

    Thasts not true, I use readpoints all the time and very rarely have any fixtures. Depending on the shape of your part though you may need to do a local iterative alignment, maybe 150mm around your readpoint in order for it to 'find' the part well enough to do the full iterative along the whole part.


    2.No Mark in interativ,, Meas all always,, not Meas all once that you have. but be careful so the probe don't crashes

    Also when you have measure all always ticked you will notice that you can now input a label name in the iterative alignment box. Its best to use a label just before where you DCC alignment starts so it can now loop properly and perform an iterative alignment. Just remember to use move points/clearplanes accordingly so that the probe doesn't crash into the part during execution. They can be a little tricky at first to use iterative alignments but once you get what is required right they're probably the easiest form of alignments I think.
Reply
  • 1. Do you always have to manually align first with iteratives? Is there no readpoint equivalent?
    2. Do you always have to "Position probe above *insert feature* " after doing the manual alignment?w

    1. Yes if you don't have any form of fixture, then you do this once.

    Thasts not true, I use readpoints all the time and very rarely have any fixtures. Depending on the shape of your part though you may need to do a local iterative alignment, maybe 150mm around your readpoint in order for it to 'find' the part well enough to do the full iterative along the whole part.


    2.No Mark in interativ,, Meas all always,, not Meas all once that you have. but be careful so the probe don't crashes

    Also when you have measure all always ticked you will notice that you can now input a label name in the iterative alignment box. Its best to use a label just before where you DCC alignment starts so it can now loop properly and perform an iterative alignment. Just remember to use move points/clearplanes accordingly so that the probe doesn't crash into the part during execution. They can be a little tricky at first to use iterative alignments but once you get what is required right they're probably the easiest form of alignments I think.
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