On a KF700/F700, the 230 shaper hood mounting arrangement typically has enough wiggle room to be able to align the fence plates to the trajectory of the sliding table during hood/fence setup, and thus aligning the sliding table to the edge of the cast iron top is probably sufficient. ?That said, I would still mount the hood and check that the fence plates can easily be positioned to be parallel with the slider movement. ?How do you align the fence plates to the trajectory of the sliding table on such a machine? The easiest way is to first mount and square a crosscut fence to the slider movement, then put a square against the crosscut fence and use the 90-degree leg as the reference surface to align the fence plate before locking down the hood. ?

But on a machine like a Profil 45, the hood and fence plates move in/out in a rigidly controlled parallel fashion, so aligning the slider movement to be parallel with the infeed fence plate is the correct approach. ?

I refer you to these two videos - read the descriptions with each. ?