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« on: March 29, 2020, 01:46:16 AM »
Mach3 and Mach4 are fundamentally different in how they treat the relationship of Axes to Motors.
In Mach3 axes each have can have only one motor and when two motors are needed for one axis, you can slave one axis to another in software. This results in a "phantom" axis that are not actually commanded in G code.
In Mach4 motors are a separate concept from axes. The relationship between axes and motors is defined by Mapping. One axis can have multiple motors. Home and limit switches are associated to motors, not axes.
This can be a bit confusing, but is more flexible.