I am trying to make a nice square cut from my old
tablesaw. I like to make a flat square cut from a piece of
1 x 6 foot board as flat as possible. I'm cutting the 1
foot end. But what I'm getting is wobbly curve looking
from a perspective view. Don't know how to describe it
but the 1 foot cut resembles an airplane propeller blade
and makes joining wood with biscuits impossible.

If this is normal for table saw, then I don't mind getting
an edge planer. If the cause is my old tablesaw, I'll just
upgrade. Question: Do all table saw do this, or just only
the cheap ones?

TIA, Tibur