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The origin of the machine (X0 Y0 Z0 A0 B0) is represented as a black line centered on the B table. The end of that line is 0.836 inches above the surface and is the machine origin point. Material can be placed within Fusion 360 using the this table and vise setup to accurately represent the set up on the machine. You can find the Fusion file for the vise and table here.
Here is a representation of a sample part being set up for machining.
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