How to supply correction data for mold tools

[[Je...]]

I know a few of you have experience with measuring injection molding tools for the purpose of providing tool correction data.

For the project I am working on, our engineers want to modify an injection molding tool, so that the surface of the customer part has less flatness error. To do this, they plan to employ windage, which is a strategy whereby the injection mold steel is biased in the opposite direction of the predicted warpage.

I scanned samples of the customer part that is made from this mold tool. Calypso provides a myriad of options for exporting points (.txt, .vda, .stl, .ses, .iges, ASCII).

• What format do you usually export measured points to for this type of a project?

• Describe your typical workflow for tool correction projects. What are some common do's and don't?

• In Calypso, do you primarily create space points, curves, freeform surfaces, point clouds, or standard geometries like planes and cylinders?

• Do you add tolerances to the features?

• How do you set the evaluation (stylus radius correction) of the measured points: touch points, plane-points, CAD face points?

• If you use curves, how do you set the evaluation according to what Calypso calls "Nominal Geometry Manipulations": Normal Vector, Actual -> Nominal, Space Point Evaluation, Grid coordinates, Radial Deviation, Space point without interpolation?

• Do you ever use the "invert deviations" or "use correction points" options in the CAD evaluation window?

• Do you have any other advice for this type of a project?

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[[Ri...]]

Maybe this is an option.
viewtopic.php?p=51276#p51276

The link goes to specific thread in the post.