Working in CAR Position

[[Me...]]

I'm fairly new to Calypso but have 25 plus years with GeoMeasure and PC Dmis.
I have a fixture that is in CAR Position but the tooling bushings aren't level or square to any axis. Can I key in the values that I want the measured bushings to be at, or do I have to do this the old school way and calculate all of the angles and enter them in manually after picking up the bushings? This is very easily accomplished with PC Dmis, but I can't seem to figure out how to accomplish this using Calypso.

Thank you for any and all advice.

[[SH...]]

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I can't understand what is your problem, l persume,you have some issue with either probing the job or manual alignment of the job.

[[De...]]

Depending on how you want to accomplish what you are attempting to do, I think you can do this a few different ways.

If you have a model for this I think you can use the checkbox's at the top of the special window in your base alignment, I have not used them so you might have to do some experimenting to see how it works. They are labeled something like keep model alignment or something like that.

If the features are in your base alignment, then you can manually add translations and or rotations to your base alignment under the special button to create an offset back to your position.

If you have a separate base alignment, then you can create a secondary alignment with the proper translations and rotations to your position and then create your new features in this alignment so as to avoid having to calculate all new numbers.

[[Me...]]

The issue is that the tooling bushings all have different numbers in X, Y, and Z meaning that there are rotations about multiple axis and in order for me to measure the fixture in CAR position I either need to be able to key in these locations and have Calypso calculate the angles or, I suspect, I have to calculate the angles manually, create a base alignment then rotate the axis to make the tooling bushings read the proper positions in CAR space.

[[De...]]

I assume you don't have a model then?

[[Me...]]

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The big issue is that I don't have fixture CAD, only part CAD. The part CAD is in CAR space rotated so that it is in the car just as it would be in the real world. The fixture has tooling bushings with CAR space numbers identifying their locations in CAR space. So I need to pick up the tooling bushings and then create the alignment to put the fixture in CAR space then bring in the part CAD and certify the fixture to the part CAD.

I suspected that old school would be the only way and that appears to be the case. Offset and rotated alignments, Oh well.

[[Ke...]]

I have only worked with part fixtures that used tooling balls, that were located in CAR positions) as was the CAD model. Our practice was to enter the size & location of the tooling balls, and use a 3D Best Fit, to locate/align the fixture and part. I'm not sure what methods other people have used.

[[Me...]]

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This is what I was looking for. The bushings are very much like a tooling ball except you need to do a cylinder/plane intersect to create the 3D point in space which is the equivalent of the spherical center of your tooling ball. My question is how do you enter the location of the 3D points? Obviously I won't need a size.

[[Ke...]]

Within the part CAD model, you should be able to pull down blank features for the cylinders and the planes, and build your geometries for each feature based on the fixture supplied nominal(s). When you intersect them, the nomonal(s) for the intersections (X,Y &Z) should also match the fixture. I believe the intersection points should be able to be used as your 3D Best Fit base alignment.

[[Me...]]

The issue is that the tooling bushings don't exist in the CAD. They only exist on the gauge with placards giving their positions in CAR Space. I can't generate the intersections from the CAD. So is there a way to measure the bushings in the real world and then give them the numbers from the placards on the gauge? Or do I need to measure them, calculate the offset angles, offset the base alignment using these angles and then compare placard numbers to Calypso numbers? As I said in an earlier post, all I have is part CAD in CAR Position and a real world gauge with car position numbers at the tooling bushings.