(03-26-2017, 08:41 AM)alsayyed Wrote: https://www.youtube.com/watch?v=W51JK40f...e=youtu.be
this is the setup i have in workshop
Watching your video several times (super helpful, by the way), I can see that you have the standard 5" wye to two 4" legs, with only one leg to your ductwork. First thing I'd do is take off that wye and put either a 5" (better) or 6"
smooth-walled flex to your fixed ductwork. I don't know what size the PVC network pipe is, but the last leg to the dust collector is too small, and it's corrugated on the inner wall. The blower outlet to the bag tree is 5", if it's like all the other 1500W units out there.
To put a 6" flex on there, remove the round inlet plate on the blower, and make your own out of plywood, with a standard 6" round stub of duct. You can make your own out of some sheet metal, and taper the end with a duct crimper tool, or alternatively use a block of wood with a vee groove cut into it and a matching wedge, tapping with a hammer to put the crinkle in it (before you roll it into a cylinder). But the end of a store-bought snap-lock duct section is easiest. Maybe a short bit of PVC pipe if the larger flex fits over it. Perhaps even taper the end of the PVC on a lathe if you can. Something like that.
But you've got to open up that first section of duct, and if possible, the outlet too.
I got about a 50% increase in air flow when I built my own cyclone, but opened the inlet to the blower (to 9", which matched the outlet of the cyclone), and also opened the outlet to 8" flex. I send the exhaust out the window instead of to filters, and that helps, too. You might want to consider also replacing the filter bags with 'oversized' fine-filtration bags with 1 micron rating. It's hard to tell from the video, but those look like the standard 5 micron or larger dust-pumpers.