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Past caring, you all the admins, have let this individual carry on way too long. I've tried contacting the admins, and starting a topic regarding the issues with the information the person has given. It's the community and the advice and information that is what concerns me. More than completely misplaced. 

As per the title, I'm wondering how a tool head will move when the active coordiante system is rotated via G10 L2 R- and a G2/G3 command is issued. Specifically because the docs say "The axis of the circle or helix must be parallel to the X, Y, or Z axis of the machine coordinate system." 

Case active plane = XY: this would seem to be the easieast to handle, but just to check, are I and J rotated to represent deviations in the rotated coordinate system or no?

Case active plane includes Z: this is trickier, because both options present apparent trouble. If the arc's axis is in the macine plane, say XZ, it seems to be impossible to use G2/3 in such a plane with a rotated coordinate system as the post-processor can't account for it and the tool would take a path different than desired. On the other hand, having the arc be in the X'Z plane (rotated), respects the path desired by the postprocessor but seems to be in contradiction with the docs.

I don't have a LinuxCNC machine installed so I can't do the practical experiment myself (I'm actually about to build a machine and I'm trying to understand the pros/cons of each system). Thanks in advance!

@langdons and unknown
I'm getting tired of this. I just deleted several of your posts that had absolutely nothing to do with the topic.