Review - PR 252306 Angularity and True position with two Datum - strange resu

huangyhg

Angularity and True position with two Datum - strange results.
<< Domenico Varacalli  --  12/18/07  12:29:11>>
I have tried to reproduce an example of tolerance of Angularity and True position with two Datum, but I have obtained strange results.
1.GIF there is the example (ASME), 2.GIF there are the results.
Notes:
- Casually, moving the machine with the joybox, an error RunTime has appeared (3.GIF)
- A new Cartesian Axis has appeared next to the origin (4.GIF). Why?
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<< Changes made by Neil Kay -- 07/23/08  16:29:50>>
Action:  Paola Pallo to Yanhua Huang
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<< Changes made by Neil Kay -- 07/23/08  14:14:05>>
Action:  David Petrizze to Paola Pallo
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<< Don Turcotte  --  12/21/07  15:34:22>>
The issue with the angularity is that PC-DMIS was not using the angle relative to the secondary datum in this case;  it was always using the angle relative to the primary datum.  I have fixed this so you can specify datums A,B or B,A and get correct results.  Also fixed this so the constrained secondary datum from the datum reference frame alignment is used for angularity as well as for perpendicularity and parallelism.  The nominal angle given on the Advanced tab was incorrect.  It should be 135 (or 135.192?).
The issue with the True Position dimension is that the dimension nominals on the Advanced tab have been set up incorrectly.  When the selected alignment is "Datum Reference Frame", the X,Y,Z nominals are given in the datum reference frame alignment which is different than the current alignment.  The values entered were for the current alignment.  You should select "Current Alignment" first, then enter the current alignment nominals. This will correct the problem with the true position.
The second (and smaller) Cartesian Axis trihedron is the Datum Reference Frame alignment trihedron for the currently selected FCF.  The larger trihedron is the current alignment trihedron.  You can clearly see from the graphics window that they are different.
The issue with the Run Time error should be filed as a separate problem.
Issues with angularity fixed in V43B and V44B.
Files inserted to server
------------------------
V43B\DIMENS\DIM_ANGU.CPP
V43B\DIMENS\DIM_PARA.CPP
V43B\DIMENS\DIM_PERP.CPP
V43B\INCLUDE\DIM_ANGU.H
V44B\DIMENS\DIM_ANGU.CPP
V44B\DIMENS\DIM_PARA.CPP
V44B\DIMENS\DIM_PERP.CPP
V44B\INCLUDE\DIM_ANGU.H
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<< Changes made by Don Turcotte -- 12/21/07  15:34:40>>
Action:  Don Turcotte to David Petrizze, Status:  OPEN to REVIEW
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<< Changes made by Tim Wernicke -- 12/18/07  06:53:47>>
Priority:  to Critical
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