I have a central dust collection system in my shop that works well for
most of my tools. Unfortunately my cabinet saw is the farthest tool
from the collector and requires a six foot hose to reach it besides.

If your run is only 6 feet and it won't pick up the dust, a smaller unit next
to won't either.

First, how is the dust collected a tthe source? Is the bottom of the cabinet,
where the inlet is, sealed? Is there enough air going INTO the saw to make up
the pickup?

Are the filter bags clean? Do you have a lot of elbows and bends? Is the hose
reasonabley smooth in the inside.

Can you run a 5" hose to the colletor instead of a 4" (I assume it's a 4", but
I could be wrong).

Is the overarm guard equipped for pickup as well (you ge m ore there during
ripping than below).