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Using bundle with the Romer

Ok so after multiple phone calls it seems as what I need to do is unheard of.

Using a 12ft Romer, 2011 MR1, I'm trying to write a program to inspect a very large part.

It will take roughly four station moves, and there is no features on the part that I can use as a common reference to get around with.

I would like to do a local alignment at one end of the part, measure my needed features, measure a temporary glued on reference then move to my next station and bundle, do the same and move again, then to be able to use the combined features for a final alignment and dimension as required. But there doesn't seem to be a way to measure a dynamic point for use with the bundle alignment.

As a work around though I haven't tested it yet, I figured I could stop execution, probe the temp ref, move the arm then bundle back in. I just don't know what that would do to the rest of my features in the program after that bundle. If it would work I could re-execute after the bundle till I have measured all the features for that position then repeat. I would much rather have a full program though that the operator could just execute and follow so that they don't have to deal with bundling themselves.

Hopefully someone might have some suggestions, a laser tracker is not an option and only using three points for the leap frog just seems like it would lose quite a bit of accuracy by the final position.

Thanks,
-Nick
  • I've had this same problem , and here is a way I figured out how to do it. Make sure you test it before taking all your measurements.

    - Do your alignment on one end.
    - Take your measurements.
    - Measure your puck points as measured points and not auto points, also turn off find nominals. (4 to 5 points should be good, spread them as far as possible)
    - Export those points and save them, if for whatever reason DMIS crashes or moves the points you can import them back in.
    - Recall startup alignment
    - Move the arm.
    - Re-measure points and do an iterative alignment (Level, Rotate, Origin all of the points)
    - Then do an "Equate alignment", this should lock everything together.
    - Repeat as necessary.

    I believe the bundle alignment more for if you have multiple laser trackers and your trying to tie them in together. As far as leapfrog, to me it's useless. 3 points is definitely not enough to maintain accuracy. As you can already tell, DMIS is not very portable friendly compared to other software out there, but it has its' strong suits. There may be other ways of doing this, but for me this seemed to work. I mostly do prototype parts, so the export/import points thing isn't an issue for me. You may want to experiment and find something more streamlined if you are doing a large amount of parts.
  • Thank you for your reply, I'll have to give this a shot.