I'm putting a fair amount of time into learning some of the fundamentals of dust collection, right now … in order to plan for that Happy Day when I
Meaning … I'm NOT the voice of experience, but have picked up some of the theoretical stuff from some reading.
My only concern with your plan is this: some of these machines require higher CFM than others for effective dust collection-so MUCH higher than you're (again, in theory) surpassing the CFM capacity of the 4"
ports on your machines
So … ideally … you'd use any of the hundreds of good sources of info to work through this by:
- establishing the CFM needs of EACH machine (and adding them together, if you plan to pull dust from 2+ at the same time),
- figuring out the size ports and ducting you'll need based ON those CFM calcs
- figuring out the layout, and then how you'll accomplish that (how many feet of pipe, flex hose, PVC, or whatever, how many wyes, how many bends, etc., etc.)
- the static pressure that all of those elements will create
- how many CFM your DC will need to create in order to achieve that many CFM at the machine
, through that plumbing
If you already HAVE the DC, then it may be even more important to "do it right-" particularly if your DC can't overcome "improper" ports, or "improperly" sized ductwork.
Here's but ONE source that helps understand the process:
I realize, now, that … if you really want to build your shop right … it IS a great option to BEGIN with the dust collection, and work everything out from there.
Are 4" ports going to be a source of ongoing pain, frustration, and regret, if you don't change them ? Oh, I doubt it. Just food for thought about trying to "optimize" your system.
Also … Bill Pentz's site IS a treasure trove of DC info:
Have fun !