Why is it essential that the vise be aligned next to the table travel? "this one is on milling machine"
A milling machine has several directions of movement call axes of movement. To produce an accurate cut with the tool the workpiece has to be clamped into position by channel of the table vice. If you want a cut that is in the direction of an axis of movement afterwards it is imperative that before you start , you "clock" the jaws of the vice to be "square" to the table and therefore the cutter. If you dont do this, you wil never sort an accurate cut