Well, I built my Thein separator, using a 69 liter/18 gal. fiber drum with a lever-lock ring. I've attached it to my Bosch 4000 TS with 2" flexible tubing and a 1150 W (220Volt) shop vac on the other side. The vac comes with a 36 mm (internal) diamater hose. I had to improvise the connection between the vac hose and the 2" connector to the DC and at that point the internal diameter goes down to 25 mm. No chance of an air leak. Initially seemed to work great. I don't have any way to measure how much dust stays in the drum and how much goes to the vac - but it seems like there is alot in the drum and not much in the vac. BUT, today, after not much use at all, I find that dust is spewing all over the place - coming back at me from the saw and over the top - in addition to what does go into the drum. Also looks like there is more dust in the vac. I tried to compare on my hand the suction directly from the vac and then from the DC - didn't feel any difference (for whatever that sophisticated scientific test is worth).
Any ideas what is wrong here?
Any ideas what is wrong here?