[An...] Posted March 27 Share Posted March 27 I have a part that sits on a CMM fixture, we probe this fixture for the alignment and for dimensions tying back to the part. We have 12 parts per inspection, but they run one at a time, this means the CMM program probes the CMM fixture(which doesn't move or change) 12 times over the course of the entire inspection. I am trying to eliminate this constant and useless re-probing. I am trying to think of a way where we probe the fixture on the first part and not the other 11 but still measure from that fixture. The only way I can think of doing this is to copy and paste the characteristics 12 times and create 12 different mini plans and run them with "clear existing results" unchecked so it doesn't rerun the alignment. Hopefully I am explaining this clearly. Link to comment Share on other sites More sharing options...
[DW...] Posted March 27 Share Posted March 27 Please sign in to view this quote. Please sign in to view this username. Change the base alignment to "Use current alignment" and keep "clear existing results" checked. Link to comment Share on other sites More sharing options...
[To...] Posted March 27 Share Posted March 27 Please sign in to view this quote. Is that an option in AutoRun? Please sign in to view this quote. Can you post a screenshot of your Pallet properies Link to comment Share on other sites More sharing options...
[DW...] Posted March 27 Share Posted March 27 Please sign in to view this quote. Please sign in to view this username. I am not sure about Autorun, I haven't used that in many years. Interesting about the pallet, I did not interpret the initial question like that. I assumed he was placing the same part on a single part fixture looped 12x. Please sign in to view this username. OP need some clarification on this fixture. Link to comment Share on other sites More sharing options...
[An...] Posted March 27 Author Share Posted March 27 DWC is correct. This is the same part on a single fixture done 12x. I don't think "Change the base alignment to "Use current alignment" and keep "clear existing results" checked." will work since we have characteristics tied back to the fixture features. So it will re-probe the fixture's anyway to build the characteristics. Link to comment Share on other sites More sharing options...
[Ri...] Posted March 27 Share Posted March 27 Try Resources - Load Alignment Use the CNC alignment from the first program. See if that helps achieve what you are looking for. Link to comment Share on other sites More sharing options...
[DW...] Posted March 27 Share Posted March 27 Please sign in to view this quote. Please sign in to view this username. Yea, if you have measurements coming off the fixture, you have to probe it. Unless you change those fixture features to "Theoretical Features" after you probe them for the first time? Link to comment Share on other sites More sharing options...
[To...] Posted March 27 Share Posted March 27 Please sign in to view this quote. For the characteristics tied to the fixture, create theoretical features for those references. For example, if Datum A feature is a plane and the part sits on this part, create a copy of that plane, turn it into a theoretical feature. Reference the theoretical feature in your characteristics. Run Current Alignment. Link to comment Share on other sites More sharing options...
[To...] Posted March 27 Share Posted March 27 Please sign in to view this quote. How do you deal with first run? Link to comment Share on other sites More sharing options...
[Ca...] Posted March 27 Share Posted March 27 I solved the same problem as follows: 1. Program that only measures the fixture. Save the base alignment. 2. Program that only measures the part. In this program, the saved fixture alignment is loaded as the base alignment. Both programs are set to AUTORUN. Run both programs consecutively on the first run, then only run the part program 11 times. Link to comment Share on other sites More sharing options...
[Je...] Posted March 28 Share Posted March 28 yes, I do that like Carsten (and, when I remember right, explained that to Tom a while ago) Link to comment Share on other sites More sharing options...
[Ma...] Posted March 28 Share Posted March 28 I am wondering how you achieved of 12 loops. I ask, because you could begin with start alignment, which will take fixture and then repeat only base alignment. But i don't know if start alignment will or will not be repeated. I would use Carsten approach - separate program for fixture, then you can either use loaded alignment as base alignment, or you can load alignment in program to use just some features with loaded features alignment. Link to comment Share on other sites More sharing options...
[Je...] Posted March 28 Share Posted March 28 Link to comment Share on other sites More sharing options...
[Ke...] Posted March 28 Share Posted March 28 Is there room for three tooling balls on your fixture? If so, you could inspect the fixture features (presumably Datum Features) looping at least 3x, and create Theoretical Features based on those results; then determine the locations of the installed toolong balls, relative to those features. Then, instead of inspecting the fixture features, you can just align to the tooling balls. Link to comment Share on other sites More sharing options...
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