Beranek's Law:
It has been remarked that if one selects his own components, builds his own enclosure, and is convinced he has made a wise choice of design, then his own loudspeaker sounds better to him than does anyone else's loudspeaker. In this case, the frequency response of the loudspeaker seems to play only a minor part in forming a person's opinion.
L.L. Beranek, Acoustics (McGraw-Hill, New York, 1954), p.208.
Here is a video of a test I made earlier this morning. The box is 2.5 lb and was sucked up tight to the bottom of 6 inch flex disconnected from my jointer. Would this now be the correct air flow and suction. If so, were the gaps in the filter plenum attachment with the gamma seal lids the culprit? I am confused about that because I thought that side had a negligible effect on performance. I really would like to have a better understanding of this> I appreciate everyone's patience and help. Just found out I cant upload and attach the video. Cant use regular attachment because file extension not recognized and cant use video insert because it requests a url. Tried taking a pic on my iphone and uploading but doesnt recognize heic extension. I have saved video to my computer . Anyone know how to now attach to reply?
Woody
Ok. Just ran another test along the lines of John's suggestion. I disconnected the drop to jointer, a 6 inch wye, so it was not completely vertical. I took a pack of printer paper(500 sheets) which weighs about 5.5 lb. If i hold it to the pvc open connector it will stick and not fall. It seems to be near the limit though. Am I now at the correct air flow and suction?
Woody
Woody, this sounds like you're where you should be on suction. But keep in mind that airflow is the real goal with this system.
Of course, the real test is whether it will pull the 25' tape measure out of your hand and into the cyclone. (Just kidding, but I've in fact had something very similar happen to me, and you've seen the video.)
Last edited by Rush Paul; 11-08-2021 at 11:10 AM.
Beranek's Law:
It has been remarked that if one selects his own components, builds his own enclosure, and is convinced he has made a wise choice of design, then his own loudspeaker sounds better to him than does anyone else's loudspeaker. In this case, the frequency response of the loudspeaker seems to play only a minor part in forming a person's opinion.
L.L. Beranek, Acoustics (McGraw-Hill, New York, 1954), p.208.
Holds a ream of paper? Seems "a little low"?
Hook up your machines you've got plenty of capacity.
Or talk to Clear Vue.
If you have a web site you put it there then reference it with the Insert Video button. If no web page, you can upload the video to YouTube then attach it to a message or simply post the link to the video. The YouTube video can set to Unlisted to hide it from the rest of the world.
I'm headed out to haul the tractor for some site work so I probably can't try any tests today.
David,
I have disconnected 2 drops and 1 now has no gate. I tried hanging a 10 lb dumbell off a cup hook screwed into 3/4 inch plywood covering a wye drop and the booard wanted to slide off at a diagonal. I am going to a shop to cut a small piece of 6 inch pvc to hook up a 45 and do a vertical test. I can do the current readings after rehooking everything up. When i took readings before from the leads from the contactor to the motor with the gates closed, i think, i got slightly less than 10 amps on each leg and 245 volts across the connections. im told this indicates the motor was up to full speed and operating correctly. Will let you know how the vertical test turns out.
Woody
Why not just measure the suction with a homemade water u tube manometer?
That is what I was going to suggest AFTER doing the basic fault finding that the OP appears not to want to do so I will bail out here and let others resolve the problem if indeed it has a problem which I doubt. The manometer will show the true story but it won't isolate any problem and that has to be the first step but apparently that is too hard. If the manometer indicated a correct reading there is no problem so I guess that is the other way of approaching it.
Chris
Everything I like is either illegal, immoral or fattening
Yes there was a problem. I have been talking, emailing, texting and exchanging videos and pics with Paul Bushey. We went over everything Monday including the changes I made to the filter mountings and he tells me that could account for low flow/suction which substantially improved Sunday after remounting with no gaps under the lids. Today I got a 6 inch port to hold a 10 lb weight hooked on a board. I also could feel the suction on a tape measure which I had in my palm and would have been sucked into the line if i let it. Paul had another idea for miter saw dust collection which i will try when i get my saw working again.
I want to thank everyone who took time to try to help. I had many suggestions on a fix, most of which I tried, all of which i considered. Chris, I didnt ignore your suggestions. Paul insisted earlier the motor was fine after talking with me, seeing video and pics and listening to my comments about performance. You were not at all concerned with leaks and if air flow was ok when flex exhaust was disconnected, seemed unlikely there was any obstruction. Paul also was not suggesting I disconnect everything. The unusual filter arrangement with the gamma seal lids was worrisome since very few use these and when i saw the gaps thats what I concentrated on the last few days. Nobody mentioned a manometer until after hopefully everything has been resolved.
In any event I think it is working now. I want to thank everyone for your support and help> I appreciate it more than you can imagine.
Woody
I am glad you got it sorted out. I think people could have been more helpful if you had posted pictures. Without seeing your setup people are making their best guess.
Yes. I explained everything to Paul Bushey, showed him where the gaps were where the filters were mounted, how I remounted them eliminating the gaps and he said that could have been the cause of the air flow/suction issues I had at my machine drops. Right after that change testing showed a huge difference in flow and suction.
That is quite interesting and contradictory to everything I think I know about the subject. In my experience increased backpressure caused by clogged filters decreases system airflow and suction, and I have read and have no reason to doubt that systems without filters (direct exhaust) have better performance than those with filters. Do you have an explanation for your contrary results? I am having a hard time wrapping my small brain around this.
As Larry said, some pictures of your setup would be helpful.