A Comparison of Touch & Optical CMM Probes for the International STEP-NC Demonstration (Renton, Wa....
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Transcript of A Comparison of Touch & Optical CMM Probes for the International STEP-NC Demonstration (Renton, Wa....
![Page 1: A Comparison of Touch & Optical CMM Probes for the International STEP-NC Demonstration (Renton, Wa. 2009) Eric Tingle Western Regional Sales Manager](https://reader038.fdocuments.us/reader038/viewer/2022102906/56649c785503460f9492e2ed/html5/thumbnails/1.jpg)
A Comparison of Touch & Optical CMM Probes
for the International STEP-NC Demonstration
(Renton, Wa. 2009)
Eric TingleWestern Regional Sales Manager / Mitutoyo America Corporation
Scott HarsilaMechanical Engineer / Micro Encoder, Inc.
Larry MaggianoCTL Senior Systems Analyst / Mitutoyo America Corporation
15 May 2009
Copyright Mitutoyo America Corp. 2009
![Page 2: A Comparison of Touch & Optical CMM Probes for the International STEP-NC Demonstration (Renton, Wa. 2009) Eric Tingle Western Regional Sales Manager](https://reader038.fdocuments.us/reader038/viewer/2022102906/56649c785503460f9492e2ed/html5/thumbnails/2.jpg)
Measurement Scenario
Copyright Mitutoyo America Corp. 2008
• AP238 v1 enables Measurement in– Touch Trigger Probe equipped MCs and CMMs to
1. Establish Coordinate Systems (6 DOF)2. Measure Features for Datum Reference Frames3. Measure vectored surface points
1. Construct multi-point Features2. Tolerance to GD&T standards
• What may be required in AP238 v? to– Enable 3D Optical Sensing for tasks 1 to 4 above?
![Page 3: A Comparison of Touch & Optical CMM Probes for the International STEP-NC Demonstration (Renton, Wa. 2009) Eric Tingle Western Regional Sales Manager](https://reader038.fdocuments.us/reader038/viewer/2022102906/56649c785503460f9492e2ed/html5/thumbnails/3.jpg)
Native CAD Model(Courtesy Boeing Corp.)
Measurement Point(s)
defined as CAD Entities
![Page 4: A Comparison of Touch & Optical CMM Probes for the International STEP-NC Demonstration (Renton, Wa. 2009) Eric Tingle Western Regional Sales Manager](https://reader038.fdocuments.us/reader038/viewer/2022102906/56649c785503460f9492e2ed/html5/thumbnails/4.jpg)
CMM with Touch Probe
![Page 5: A Comparison of Touch & Optical CMM Probes for the International STEP-NC Demonstration (Renton, Wa. 2009) Eric Tingle Western Regional Sales Manager](https://reader038.fdocuments.us/reader038/viewer/2022102906/56649c785503460f9492e2ed/html5/thumbnails/5.jpg)
CMM Touch Probe Results
![Page 6: A Comparison of Touch & Optical CMM Probes for the International STEP-NC Demonstration (Renton, Wa. 2009) Eric Tingle Western Regional Sales Manager](https://reader038.fdocuments.us/reader038/viewer/2022102906/56649c785503460f9492e2ed/html5/thumbnails/6.jpg)
CMM Touch Probe Results
![Page 7: A Comparison of Touch & Optical CMM Probes for the International STEP-NC Demonstration (Renton, Wa. 2009) Eric Tingle Western Regional Sales Manager](https://reader038.fdocuments.us/reader038/viewer/2022102906/56649c785503460f9492e2ed/html5/thumbnails/7.jpg)
AP238 Touch Probe Considerations
• Touch Probe points for Datum Features?– Define touch points explicitly?
• Task uncertainty to tolerance ratio?• Point “tunneling” accuracy?
– Maximum limit?• Min/max stylus tip diameter?
– Appropriate for surface curvature & clearance?– Contact averaging effect?
![Page 8: A Comparison of Touch & Optical CMM Probes for the International STEP-NC Demonstration (Renton, Wa. 2009) Eric Tingle Western Regional Sales Manager](https://reader038.fdocuments.us/reader038/viewer/2022102906/56649c785503460f9492e2ed/html5/thumbnails/8.jpg)
CMM with Optical Probe
![Page 9: A Comparison of Touch & Optical CMM Probes for the International STEP-NC Demonstration (Renton, Wa. 2009) Eric Tingle Western Regional Sales Manager](https://reader038.fdocuments.us/reader038/viewer/2022102906/56649c785503460f9492e2ed/html5/thumbnails/9.jpg)
CMM Optical Probe Results
![Page 10: A Comparison of Touch & Optical CMM Probes for the International STEP-NC Demonstration (Renton, Wa. 2009) Eric Tingle Western Regional Sales Manager](https://reader038.fdocuments.us/reader038/viewer/2022102906/56649c785503460f9492e2ed/html5/thumbnails/10.jpg)
CMM Optical Probe Results
![Page 11: A Comparison of Touch & Optical CMM Probes for the International STEP-NC Demonstration (Renton, Wa. 2009) Eric Tingle Western Regional Sales Manager](https://reader038.fdocuments.us/reader038/viewer/2022102906/56649c785503460f9492e2ed/html5/thumbnails/11.jpg)
AP238 Optical Probe Considerations
• Use Optical Probe points for Datum Features?– Or use point set from touch probe measurement?
• Task uncertainty to tolerance ratio?• Min/max point density per Feature?• Parameters for outlier removal (filtering)?• Parameter for trimming, as an offset from
Feature boundaries, for ‘over scanned’ points?
![Page 12: A Comparison of Touch & Optical CMM Probes for the International STEP-NC Demonstration (Renton, Wa. 2009) Eric Tingle Western Regional Sales Manager](https://reader038.fdocuments.us/reader038/viewer/2022102906/56649c785503460f9492e2ed/html5/thumbnails/12.jpg)
AP238 Scenario Results
• Defined touch probe points are extractable
• Optical probes are applicable
• Probe type (optical, scanning or touch trigger) defined for Working Steps
• Data from different sensor types is comparable
Copyright Mitutoyo America Corp. 2008