In Fusion pic Z+ is up, X+ is away, Y+ is to the left.
In Mach3, typ setup would be Z+ is up, X+ would be to the right, Y+is away.
Or normaly all the axes move in a positive direction from the origin.
Now in Mach's graphics screen, rotate the view such that the Z+is up, Y is away,
X+ is to the right. Compare to what you have in Fusion pic.
Suggest you get the WCS system of Fusion and how it is portrayed understood,
model the part correctly such that both Fusion WCS and your Mach setup agree.
RICH