I have the same problem, dy cnc router, using Planet board 3/4 (9axes) and software. After quick info with Planet-cnc I am usung Linux-Emc PP with some pluses and minuses. First, there is a problem with G28 then G53. I have disable both because I have most of the time zero at the table not on top of the object
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I manage to implement 2 statements in to f360 PP window for selecting (yes/no) f.e. vacc, but PP is not writing anny lines for that. Anny idea how to program that? I am not a programer ...