I've jointed, planed, and cut a lot in the last few days, so I can finally do a full report on how my dust collection system is doing.
It's a 2 hp harbor freight unit, 4" PVC around the shop, short runs are 10-15 feet, long runs are 30 feet, harbor freight blast gates at each machine, harbor freight clear flex hose in very short lengths for machines that needed to be able to swivel/move, thien baffle, direct exhaust outside.
In short, I'm very happy. I have collected a full bag's worth of shavings and dust, and have collected about a dust pan's worth of debris off the floor when cleaning up afterwards. The Thien Baffle is seemingly doing its job nicely as the outside exhaust has barely the slightest evidence of very fine dust making it out there. My longest runs and my shortest runs are all sufficient using the 4" pipe and imperfect pipe runs. I've been running my overhead box fan air filter when working, and using the respirator during especially messy work. Honestly, I'm not sure I'll see a need to improve the system all that much over time.
And on that note, changes/improvements I'll be making:
- Sucking through the bag works fine, but the skeleton that keeps the bag open is taking a beating. I'm switching back to a hard canister. Oh well. Nothing ventured, nothing gained.
- There are a couple easy-to-change 90 degree bends that I'll be swapping for 45's.
- I will be extending the port on the back of my miter saw to aim the burst of dust down to the collection tube. Although the explosion of dust is mostly caught by the hood and DC system already, this change would be beneficial in not letting it blow up so much in the first place.