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Example: I design a mold with an uneven parting line. After machining of the tool I want to verify that the steel has been cut to the CAD data as close as possible to minimize the amount of time it would take to spot the tool. So to do a quick check I drop some random points on the surfaces of the CAD data. I then plot out the XYZ coordinates of these points on a print for the NC operator (or CMM operator) to check with his pick up probe. Another use for this might be for Electrode Location prints. I currently make Electrode locations sheets using the 'Hole Table' function. This does not allow me to do XYZ coordinates (3D coordinates never seem to work) for the electrodes and quite often the Hole Table fails to plot the XY accurately.
Could a Macro be made to do this if there currently isn't a way to do it?
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Message 3 of 6
Originally posted by: ChrisW
There is a free program, CmmIn, which helps you compare the CAD data with (CMM) point data verified from the cut part:
Thanks. I had already downloaded that one. It is quite handy and we have used it a couple times to make modifications to our CAD data based on the CMM data.
What I really need is to go the other way. I want to make a print of XYZ locations of points. The same way you can use the Hole table but for points.
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That will be the PointsOut program, also available for download. PointsOut can make an ascii file for your CMM/NC. You can save the data as a VX table file too if you want tabulated XYZ data on a drawing.
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Remember that on a variable parting line, the XYZ coordinate won't be much help to the CMM without the approach vector, (unless you're using a pointed CMM stylus) because you'll always have a cosine error which will make the part will appear "heavier" that it really is. A couple of years ago I wrote a macro that extracts the surface normal for each inspection point then generates the actual program code for the CMM. This code can be cut and pasted into a CMM program as text. Of course, this depends on the type of CMM you're using. Let me know if you're interested in more info about this.
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