Program Accuracy

I've been programming CMMs for about 8 years now programming in PC-DMIS for almost 2 years. I've been interviewing for a programming position's lately because I'm moving and I keep getting asked how do I know the program data is correct or accurate. I haven't really been asked this before and I've been saying that I check the data of my features used for alignment and calibration results but I'm not sure if this is the right way of checking.

Does anyone know if this is correct or if there is a better way to check the accuracy of the data generated from a program?

Thanks

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bfire85 over 7 years ago

Experience tells me I'm doing things the right way, especially with GD&T. Understanding how that stuff works and proving it out is a good indication you understand the print. There are only a few ways to measure lengths, diameters, angles, etc. Kinda hard to jack that basic stuff up (if you're seasoned). However, if I can double check with another calibrated Gage to validate the CMM, I will do that as well. Especially in cases where I'm unsure. I will also perform a Gage R&R to make sure I have my bases covered.

I've never had to answer that question either. But good luck in your future endeavors!
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bfire85 over 7 years ago

Experience tells me I'm doing things the right way, especially with GD&T. Understanding how that stuff works and proving it out is a good indication you understand the print. There are only a few ways to measure lengths, diameters, angles, etc. Kinda hard to jack that basic stuff up (if you're seasoned). However, if I can double check with another calibrated Gage to validate the CMM, I will do that as well. Especially in cases where I'm unsure. I will also perform a Gage R&R to make sure I have my bases covered.

I've never had to answer that question either. But good luck in your future endeavors!
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