The I,J,K vector further defines how to get there, like flying a plane. X,Y,Z is the nominal "perfect" point in space. What is the benefit of using I,J,K vs the standard X,Y,Z measurements on the CMM machines? Maybe someone else more up to date can chime in. I'm kinda presuming this is independent of the probe centerline. I didn't know you can comp the radius by using the vector. Here's an interesting definition I ran across though, from Geomet: In my time, CMM IJK's were just a convenience to get somewhere on a part where a vertical probe couldn't go. If your question is relative to CMM, I'm afraid my knowledge of that stuff is 20 years out of date. The design engineer may use degrees and fractions of a degree to specify the vector of a hole, for example, but it's up to the CNC programmer (and his software) to translate that to the machine's code of IJK vectors, with foreknowledge of the machine's limitations. If it's for multi-axis CNC vectors there is no IJK "tolerance" applied beyond the machine's limitations. What is the context of the IJK? Is it being used as a machining (CNC) vector or a CMM vector? Or a localized position point? However, understanding what vectors and I,J,K is/are is crucial to becoming better at what I do.I'm not sure if I understand the question.
I usually create an alternate alignment that levels to the surface in question to help circumvent this. It seems like I,J,K becomes important when measuring angled surfaces from what I can tell. That spredsheet is VERY informative, if not a bit daunting. Thank you, Owen! I'm 34, so just young enough to rely on technology, but old enough to appreciate the time before it ruled us. I guess you'd have to be on the older side of life to truly realize how technology has made things so much quicker.Īttached is an excel document with all kinds of info and calculators for vector, bolt pattern, angle, ext. Then I got a Texas-instrument smart calculator you could store formula programs in (actually had one before a computer), then items like the attached and now engineering cadworks or internet. I remember a time I calculated everything by the formula in a book or hundreds of pages of notes I'd taken.
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