I Made a Centrifugal Dust Separator to Upgrade My Cheapo Dust Collector
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- čas přidán 18. 05. 2021
- Harvey Dust Processor: www.harveywoodworking.com/pro...
Jet Dust Separator: www.jettools.com/us/en/new-pr...
Tools and Things:
Lathe Carbide Tools: amzn.to/3uUoNJ4
Acrylic Tube: www.ebay.com/itm/372494136058...
Canister Filter: wynnenv.com/product-category/...
Clear Adhesive: amzn.to/2S81bC7
Spiral Router Bit: amzn.to/3yoSx38
5" Dust Hose: amzn.to/3vbdJHu
Toggle Latches: amzn.to/3vbEHiB - Jak na to + styl
People make woodworking look easy, you on the other hand make it look like a deathtrap
Yeah, but; we are all laughing! Just a bunch of sick people cheering on King Dunn! And do we really want it any other way? Nah!
I just came on here to talk about the blade and the proximity of his fingers….
@@richardmilsom3350 there are a lot of woodworkers and carpenters who have a lengthy career with two or three fingers missing.
@@henryD9363 30 years of carpentry and still have 10 digits. Mind you, 15 years ago I took a chunk out of the tip of my middle finger on a table saw so, touchè.
Why do I like it though? Lol
Perfect balance of inspired brilliance and dangerous half-assery.
😂
Omg yeah I'm was sitting here thinking how in the world does he still have his fingers and hands left
Haha… I just found this channel and couldn’t have said it more perfectly!
This is the first video of yours I've seen. The amount of truth and honesty you display in ACTUAL woodworking is pivotal and a genuine joy. Self-deprecating humour aside, you show your mistakes. As much as we all enjoy a 12-minute video that covers over 200 hours of footage and hundreds of mistakes (all woodworkers make mistakes, great woodworkers make them look like features!), I hold a profound respect for you including your errors in the video. I have rarely enjoyed sitting for 40 minutes on a single video so much. You are a cherished new member of my channel collection, sir, and please don't let anyone silence your thunder.
Now, if you'll excuse me, I have more of your videos to binge.
This has to be one of the funniest woodworking videos I’ve seen in a long time. Bravo for showing the failures and I love the self deprecating humor.
It's impressive the amount of dust you need to make to make... a dust collector.
Just normal woodworking.
Even more impressive is that he still has all his fingers
CL: Nope sadly they are Prosthetics :(
One word.... planner
@@nc3826 shop built
I think my very favorite part about this is when the camera is in the way and you can see him push the wood forward again just to see if he could maybe get away with finishing the cut before moving the camera. Its the little details like that, that are the most amazing.
it was written all over his face, "do i knock the camera over for comedic effect or do i readjust it..."
I could see myself in that moment. Subscribed. 🙂
One quick recommendation... place your fan on the back side of the collector. That way your dust collection box will be under vacuum rather than pressure and you won't be running as much material through the fan. Also, if the pressure drop in your system is low enough you could switch to a higher efficiency backward inclined fan down the road.
My thought exactly. Why put all those chips through your impeller and potentially damage it?
@@penguinhobbs The impeller is specifically designed to withstand wood chips, is it not?
@@joelhicks5162 it is but can still get damaged, also if you sick any metal in it could cause a spark and potentially a fire. Safer to put cyclone before the impeller.
@@penguinhobbs That makes sense.
@@penguinhobbs Thats how all bag dust collectors are designed. As well as Kirby Vacuums... and leaf vacuums. prob some other stuff too. But with the new cyclone, would make for a MUCH quieter running system. I'd say put it on the outlet as well. Heck, you could throw an HVAC squirrel cage fan in there now for more blowey power.
I love the imperfection and the fact that you don't mind showing us that woodworking isn't always perfect and not all results are as planned. Awesome video IMHO and I'll watch more!
That's the entire appeal with both channels. It's not brushed and error free. It's like all of us. Really nice to watch some one realistically working with their cars or wood
I'm the Sam from Patreon. I'm watching this video from my hospital bed after having a brain tumor removed and this made my day! I helped!
EDIT 2021-09-06: Wow, I was not expecting this response! I'm three months post surgery and while recovery continues, I'm doing well and the expectation is that I'll be better after surgery than I was before. Thank you for all the well wishes!
I wish you a speedy recovery Sam!
Well done Sam!
Good job brother
Remember!, Keep your expectations low and you'll never be disapointed
Enjoy life!
Speedy recovery Sam
Speedy recovery 😉
At first i was thinking ohh my god hes gonna spin that bad boy up real fast and its 100% going to explode. Then i relized it was stationary and my fears removed. Its looks sweet and functions to boot. Keep up the good work.
I was thinking the exact same thing. lol Good on him!
I had the middle cones spinning inside the tube. It took way to long to figure out how it was working
Same, I was like how is it going to spin if it went in that tight???? Then he turned it on and it made sense. The clear tube is awesome to see it actually working.
Yup. Definitely figured some mayhem would occur when he powered it up. Happy but sad that nothing happened.
Don’t you think the dust separater should be on the other side of the fan so the big chips would be removed before they hit the impeller?
From the start of the video I was expecting a disaster. I was severely disappointed! Absolutely gorgeous execution. you've earned my subscription.
It was very inspiring to watch you fail over and over and still get there!
Maybe it's time to invest in a 3D printer too lol
I'm sure someone has said this before, but It might help to put the blower on the exhaust side of your separator as a vacuum. This would pull the dust through the separator. This will help prevent the impeller on the blower from getting damaged by the dust and chunks. Great work! I love to see people make an attempt, and show how things didn't work.
That is the reason I sold my Harvey, e.g. the impeller continually was blocked by anything that would not pass through the safety screen on the input port. I decided to go with a true cyclone to seperate the dust before the air passed through the impeller.
“I made garbage lathe tools!”
“Turning this baltic birch is really hard!”
With proper tools, turning is really fun and won’t kill you!
But in turn doing that will take the fun away
@@BassBanj0 not doing it could take your fingers away! It’s like Shop Roulette!
Turning plywood, which is 100% end grain is less fun.
High quality lathe tools make all the difference in the world. Makes for possibly my favourite part of woodworking
@@queazocotal Turning solid wood would be cutting 100% end-grain 50% of the time; plywood would be cutting 50% end-grain 100% of the time.
So this is how the wood shortage started...
With the price of lumber now, he'd probably be better off buying the actual centrifugal collector for $2k.
ha ha ha ha ha totally his fault!!!!
Save a tree , measure 3x then measure once more , take a chance cross your fingers and cut. Don’t work for me but it may help you!
Wood was being used at an alarming rate to make toilet paper due to TP hoarders.
lol
This makes me want to add a vacuum dust cyclone ahead of the Harvey design, to get rid of most of the big stuff, then run the motorized impeller, then the Harvey designed pressurized separator. Thanks for showing me this design!
Hey a regular dude showing the actual learning curves of woodworking and DIY. Absolutely subscribed, awesome editing, great personality, and solid end product. Keep it up.
Check out Aging Wheels if you want this but on weird cars
Why go the easy route when you can do it in a very complicated and fun way like that!
Extra bonus is that you now have a rather impressive looking structure to separate dust for you.
Editing was on point as always too.
Well done Robert!
Gotta admit, I'm tempted to try to build one just because it looks like fun. If I had a lathe, I might even be tempted enough to try it!
It made Rube Goldberg smile
@@andymckenzie8031 If you want to try it I can recommend a vertical cyclone collector
I've seen them on youtube in all shapes and sizes and in one video they even made it out of buckets.
Love your enterprise D PFP
LoL I love how you contemplated just knocking over the camera then thought "I probably shouldn't risk breaking my camera"
Wow. The editing at 22:55 is a breakthrough. I LOVE the way the ends of each piece align as the cutting sounds change. You could do an entire song w each build. Fun to watch, informative, and artful.
Yeah that's a big stepup!
Fisher shop does that a lot pretty dope sounding lol “ the song of my people” 😂😂
the sheer amount of joy in his voice when he turned it on is just great
I don't know what happens off-camera, but your ability to keep from throwing tools when stuff goes FUBAR is astounding. Kudos, sir.
That look when he hits the camera tho lol
You throw your tools? Strange. I'd just have a board with nails to whack.
You are absolutely insane. Thank you, Sir! P.S. leaving your mistakes in warms my soul and probably helps people that don't do this kind of stuff appreciate the effort involved a bit more.
^ +1 ;) This would be me if I had the money to buy those materials! Most of my DIY projects come along just about like this, but on a much smaller budget. ;)
I really do appreciate that he leaves mistakes and repeat mistakes in. he's human, he's one of us
Yes his patience and fortitude, pressing through with (at least on camera) a good attitude is a lesson for me at least.
You are making the best woodworking videos on CZcams right now. Showing the mistakes and the problems (...and solutions) as you're going through the project are so important for beginner woodworkers to see.
Keep the videos rolling.
I really appreciate you showing your mistakes, I feel like a lot of people hide theirs and it just shows your humility and the trials and errors of engineering. Great video!
It’s a miracle you still have all your fingers.
Yes, I was cringing, too !
Seriously, this guy is a danger to himself. Guess there will be an oops video some day!
I was waiting for him to say "whoops, i forgot not to put my hands on the spinning blades"
My dad makes cabinets, says to treat the machines with respect, but dont be afraid of them.
I was thinking that the entire time
What a relief it is to see that not every build ends up being flawless as you see on most CZcams channels, your efforts are much more like my own. I look forward to seeing much more from you in the future and hope that we both improve as time goes by.
Ya I agree. Fucking comments are full of the high and mighty (*eyeroll*). This dude did work. Only thing that would have made this 110 was him getting progressively drunker. Or maybe that's just me.
agreed, its nice to know that there is crap that goes wrong when working on a project and that it can all still turn out nicely! i love the end result and can watch it for hours
The algorithm just told me you have another channel. I've been watching you for a year, didn't know about this other channel. Can't wait for more annual projects being posted here :)
Your video gave me anxiety, but I do commend your perseverance. Great showmanship and comedy. Good work.
my moto has always been "measure 3 times cut it wrong anyway"
great vid very frankensteinian
Have you tried think thrice, measure twice, cut once. It can help prevent an embarrassingly large scrap pile. All the best buddy.
Assuming you don't mind, I'm going to make a placard with that excellent (and hilarious) saying to adorn my woodshop.
If you do mind, and don't want me to use your little gem, let me know... I am in Oklahoma, and should be easy to find ;)
@@wallace631 lol help yourself glad you enjoyed it
@@wallace631 Add just a bit of extra humor and cut one of the frame pieces too short. Lol
The old dust collector sprung a leak when it realized it was being replaced. Addendum: Watching this video reminded me why I don't have a wood turning lathe. There is something very safe about locking a tool in the tool post of a metal working lathe (which can also cut wood in a pinch) and keeping your fingers clear of the spinny thing.
The machines are waking up...
Then you get into metal spinning and it's all the craziness of a wood lathe with razor sharp metal.
MRCNC1967: Have you not found Clickspring yet? He semi-frequently uses hand-held tooling on metal... The first example I found is about 45 seconds into this clip: czcams.com/video/_Bm6PbMDkQk/video.html ... but there are other, better examples. His knurled knobs spring to mind... I'll let you discover at your own pace, though. :D
...in a pinch lol
It's not the best representation of ways to use the lathe. Go watch some professional wood turning videos, there are much better ways. And longer tools go a long way towards tool control and better safety. And they aren't that much more expensive.
I love how your not afraid to show your mistakes! I've been a hobIest for about 40 years and find your videos to be informative and fun!
I don’t know how your video came into my feed but I found it immensely interesting. Keep learning and trying new things.
I like your confidence, building the whole thing without actually testing the main piece.
It was lovely that those blanks removed themselves from the lathe for you. Time is very precious these days😄
This is my 3rd or 4th time watching this video, ‘I’m just a guessing moron’ never gets old. Your comic relief throughout this entire video is classic. You really do need your own television show, the ratings would be incredible.
I like how you made peace with your mistakes. I was watching and telling myself: I need this peace with my mistakes. Cause whenever I make one I go crazy and distroy everything
Wow Robert. I think this is the most dangerous build I’ve seen you do. Glad you still have all your parts!
how did you comment on this video 17 hours ago when it was posted 13 minutes ago
@@user-hv1hu3jh1s Patreon, I am guessing.
My thoughts exactly. Robert, please, do look after yourself!
Watching him stick his hand in the middle of the bowl to cut the slots on the table saw made me shudder.
Yes, Patreon. Also, yes, that lathe is terrifying.
Love your mental fortitude to experiment, and then have the stamina to fail, correct, and plod on to a win. You have some of the best maker content on the Tube.
I know that I have a tendency to make things more complicated than necessary,
but you are the G.O.A.T. of needless complexity.
I bow to the master.
I was on the edge of my seat the entire time watching this. You are more terrifying than all the 90s horror movies combined. Subscribed.
The noises of happiness emerging from this poor creature when the machine of his dreams actually worked was well worth the long road to the end haha!
I must admit I had my doubts but that really worked spectacularly! :D
Thank you for including the failures. Failures are an incredibly important part of learning, and personally I want to learn when I watch these videos :)
This channel is where you should go if you want to see failures. Unapologetic failures. I love his channel.
He did break the 2-in granite table top. Although he didn't video it unfortunately.
I really did not expect this to work. I think I was almost as excited as you when I saw the good thick swirls of dust, watching the chips and fines fall into the bin was highly entertaining.
Dude, you made a thing and it's badass.
What a legend. Honest and humble.
The hand placement right above the tablesaw blade gave me anxiety
Well, does that mean you're perfectly comfortable with his lathe operations?
Traditionally, the separator goes before the fan. That would keep the chips and dust from destroying the impeller. Have you tried to put the filter inlet before the fan? Have the fan suck the air through the dust separator.
After watching this debacle, I get the distinct impression that this guy has a LOT more money than sense. He also has far too much time on his hands, and no ability whatsoever to understand what he is actually doing.
@@johncoops6897 how did you manage to get this impression? its incredibly negative for having watched one video, especially considering it is a video about MAKING a CHEAP alternative to a commercially available product... instead of just buying one. i will say the way he used the lathe in this video was really questionable though. i just dont get how you managed to get such a negative impression one one video
@@christophkogler6220 - Well I _"got the impression"_ simply by watching a number of this guy's videos.
He's kind of amusing in a Fawlty Towers / Mr Bean kind of way.... but his lack of planning, poor design skills, and needing to re-build things numerous times make it a frustrating viewing experience for a more technically competent person like myself.
He has certainly invested in lots of very nice machinery, yet he seems to end up with pretty half-baked project results. I reckon he's a nice person, and he's certainly not arrogant nor ignorant about his shortcoming (eg: ProjectFarm), and he even makes jokes about his own silliness.
In fact, it's hard for me to understand if the whole thing is real or an act or trolling the viewers, but I spend too much of the video shaking my head in disbelief at his antics. I came here to learn how to build a dust separator, but I ended up watching a comedy sketch.
@@johncoops6897 I cant find any faults with that. If you know what you're doing in a field, it can be quite grating to watch amateurs at work. I only watched this one video, which didn't seem so bad to me, but I only took a woodworking class in high school.
Except for him using the lathe, after the first time something popped off of it I was wondering what the fuck he was thinking, and he kept having things do that. Was worried he was gonna get hit in the face with a brick of wood.
@@johncoops6897 - As he has said numerous times, his videos are not "how tos". They are purely entertainment and to WATCH an UNSKILLED person solve a PROBLEM in the way a LAYPERSON without specialized tools or expertise would do it.
If you want high result wood projects, go watch Wooden Gears. If you want cussing and wrenching go to AvE. If you want machining or anything else, go to one of those channels.
I literally do not get the point of complaining about a video series, the entire point of which is showing and unskilled person build things.
Oh. And it's 'Fawlty Towers'.
I watched the whole video and kept thinking "it might be cheaper to buy the real thing" and I am glad that I didn't skip to the end. Thanks for sharing the thinking behind these projects. Also I was not aware of this type of dust separation, so I for sure learned a lot from this video.
It's refreshing to see a "real guy" working in his shop and how things "really" play out.
Dude, I sincerely admire your tenacity in solving very difficult problems. Well done!
While I had a great time watching this and I'm glad you still have all your fingers, this seems like a perfect project for a 3d printer..
Your temerity is admirable. I despise turning with a fiery passion. Good on you for sticking through it.
Just discovered this channel, it's superb.
A real person, making real mistakes. This is just how I used to work on things, self-deprication and everything 😁
Your laughter and excitement when the final product worked was amazing. I understand the feeling of something coming together after so much work. Thanks for the great video, it makes me want to experiment more 👍
Dude... this is friggin AMAZING!!! I'm going to build one of these. I'll be working out my 3d printer like crazy
That was my thought entirely: That is a job for a 3d printer.
If you figure out how, I’d love to buy the 3D model!
@@markhalvorson4631 For sure. Once I figure out a design, I'll post it to Thingiverse.
@marthale7 Chain the knockoffs FTW
I commented something similar, this is a perfect project to 3d print.
Loved it loved it..I am a retired master carpenter (Over 40 years) Dust!!!! It's like mice, there is always a better mousetrap to be made.. I have pretty much seen it all and used it all in my personal shop.. I have both a metal shop & carpentry shops.. I use a system quite similar to what you have, but on a much larger scale, I have 3 in tandem separate centrifugal systems, The dust from some woods (treated) are very toxic and can cause bad health issues, being my advanced age, I do not want dust to kill me, LOL.. My wife & I so love watching your video's, Your approach and problem solving are exhalent.. You have mad skills, and that is a good thing, I know this video is an older one, but I still loved watching.. Thank you for sharing...
Nothing is so satisfying as person who learns how to solve problems and overcome
I love how frank he is about his mistakes! Very funny and relatable. Great content!
Your whoops of joy when you saw it working are infectious! I was smiling like a fool. Awesome work, it's amazing to see a project succeed!
I like this guy cause he try’s and doesn’t give up. He’s not snUDDIE showing off his EXPENSIVE TOOLS THAT HE DOESNT OWN. He makes stupid mistakes we all make and admits it
There's just something about your warts and all, and your totally honest videos that I really like, - quite entertaining - Thanks Rob
One of the things I like about this channel is that you undertake projects that seem overly ambitious. But you’re pushing your skills and doing these projects for the challenge of doing so.
The excitement when you fired it up, and it worked, was the most genuine thing I've ever seen on this platform. I always look forward to your videos. Thank you for what you do.
Fantastic job role modeling humility with transparency of all the issues you had with the build. Well done!
13:45 I read the comments when the first piece flied away and saw some comments regarding your hand too close to the blade... I think you did that on purpose here 🤣
I also thought at the beginning that it will be a boring clip, but you nailed it with speeding up the boring part and made me watching with pleasure all through the end.
So, props to you!
this man fully embodies cut twice measure once I love it. do a project with all the goof pieces. keep up the good work.
Like how you showed your mistakes and how you just kept moving forward! Made me feel better about how many mistakes I make in my projects
Great How-Not-To video. I am glad that you still have fingers.
I am so freaking grateful that I know how to draft and 3D print things!!! You can 3d print all of the cones fins, etc in this project.
Now i want a 5 hour video of just watching the swirly dust collection action 🙃
I'm far more impressed when someone pulls something like this off with what you have available as opposed to someone with a full on cnc where you just push a couple buttons and wait for robbie to finish the hard stuff.
ok, boomer. Call me when you can write G-code
@@ettumama your generally don't write the gcode by hand unless you're a massochist. You design what you want in your favorite editor and then push the gcode off from there. What you get can be more precise, and you can get some really pretty results. But it's the difference of "look what I made" vs "look what I bought"
@@TheLukemcdaniel thats right, all of the CNC technicians out there are just dumb kids playing with expensive toys. There is no art or creativity involved at all.
@@ettumama who shat in your cheerios?
@@TheLukemcdaniel some old boomer with his "CNC is just pushing buttons and throwing money at it" attitude started running his mouth like he had any idea what he was talking about.
I love your channel because you're just a dude, in a garage, making stuff. You make mistakes, and don't cover it up. You don't have $100,000 worth of the best tools money can buy. You use tools the average person would have. Respect dude.
This is my first video of yours. Thanks for the humor and honesty. I appreciate both. I just subscribed to your channel. 😊
Really enjoyed this video! I'm impressed by the level of effort you put into this before even a test, and your perseverance with the fin complexity!
Humor: A
Engineering: A+
Showing your mistakes: A
Entertainment value: A+
Awesome build and video, Robert! Totally worth every minute. You are the ultimate creator and entertainer. 👍🏼
Thank you for your work and being honest with all mistakes and problems and fixes ... looks best and real!
Thanks man
I just ran across your videos for the first time. You are a mad scientist in woodworking! I love it! Thanks for not editing out all of your mistakes. It makes the rest of us novices feel more human.
Thanks for showing us the jet equivalent at the end. I am nowhere near your skill level, but I’m trying to build dust collection into my CNC workbench.
Right at 22:02 I literally had to laugh loudly multiple times. That expression on your face when you consider whether to go through with the cut or not.
Comedic gold!
He had the expression of "you must be kidding me". I feel bad for him with that
this is the first video I've seen from this channel and you sir are the living definition of measure once cut twice
I also like the fact that he’s not embarrassed to display his collection of Ryobi Tools of which I am a fan. Good quality affordable tools and they don’t switch up battery styles on you.
I really appreciate your honesty while building this. Mistakes werent cut, decision making wasn't embellished, and it just kind if seemed like how a project would go if I winged it.
A windey road to get to the final destination.
For real, there's a ton of salty pearl-clutching mother fuckers in the comments, but goddamn if this ain't 99.99% of actual homeshop experience
Under Dunn: Where DIY (homemade) can be D-A-N-G-E-R-O-U-S!
He makes the mistakes so we don't have to. What a guy!
Okay, if you really want to make those mistakes, go ahead.
This is the first video I have ever watched on this channel...and while the final work is impressive...the thing I found most impressive is that you are still alive, have no visible cranial scars...and you are still in operational possession of all 10 fingers...
You deserve some kind of award for this video. Very entertaining and informational!
Outstanding AND you included the very entertaining "he coulda died" lathe sequences!
All in all well done Mr. Dunn.
Hey Under, I would recommend putting your turbine to the back of the separation box which will protect your turbine fins from the larger stuff going through your filter. IT will be caught by stage 1, and won’t hit your fins. Just a thought.
How did you manage to make something go wrong at every step. It's like an art
I have a metal working shop, welding, cutting and grinding. Most dust collection systems sold use bags or filters. They cost money and I would like to just dump a trap for a few minutes labor. Your system has given me ideas for my shop dust problem solution.
Absolute gold! Love your contempt for the camera when you hit it with the plywood! haha. Keep up the good work!
This was great to watch, i totally relate to those projects where so many things go wrong but nothing is going to stop you from completing it! Great work mate!
By far, this was one of the most entertaining things I have seen in the WoodWorking topics on CZcams. The humour was fantastic! The end result was a great accomplishment.
The dustbin box construction is called "Rail and Stile" or "Frame and Panel". Its nice to see people including the problem solving part of a project, even the very human failures. There can be something to be learned from those as well. That's why I like Matthias Wandel as well. That being said, I think you just recreated a Dyson and they will be sending out a hit squad.
That was an extremely impressive build! I'm glad it worked out so well in the end too.
Looks like a wooden jet engine on a mid century modern cabinet, glorious!
Your enthusiasm, creativity and good humour make this a pleasure to watch; not to mention the fantastic creations... thanks for a great video!
Dude your videos are great! Thank you for showing all your mistakes and not taking it too serious. Woodworking is suppose to be fun and far too many woodworking CZcamsrs take it too serious. I’ve watched about 5 of your videos and I get a laugh (as well as ideas for future projects) every time. Keep you the great work. 👍🏽
Ummm...your blower has to blow the dust-laden air (I know it did the same thing before). Having seen a few blowers destroy themselves when something big comes down the pipe, have you thought about putting the blower AFTER the dust separation stage?
Exactly. This is actually a really big deal, and happily, easy enough to fix by reversing the order of the components. There is a lot of energy in the outer tips of the impeller blades rotating at 3600 RPM.
Did you also note that the spin separator thingy is sealed and completely non-serviceable. The only thing that will prevent the whole thing choking up is that he has the blower fan to chop up every thing, just like a leaf blower fitted with the vacuum attachment and bag.
When he first starts it at 33:04 you hear the fan chomp up something very hard (a rock?) and spit it out into the separator. The small black chunk completely bypasses the first stage and get lodged in the white air vanes. Interestingly it somehow disappears after a jump cut :-)
@@johncoops6897 that's no problem. The type of filter he's using is set to blow up the workshop well before the service due date of the dust separator.... (and I'm not even kidding. I used to design these things professionally, and there's a reason why that type of filter is illegal in Europe)
@@lukearts2954 Are you talking about the cyclonic separator or the filter box he made? And what is the risk that makes them illegal?
@@williamsacksteder9438 I'm talking about the over-pressure single bag unencased filter, not about his separation contraption.
The biggest risk is explosion on repeated use without any form of containment or mitigation.
For professional and semi-professional applications, vacuum filters are mandatory because in those filters the dust does not go through the fan.
For hobby applications with rare use, there are a lot of conditions that have to be met in order to use these flimsy filters in a fully legal way that complies with all insurance caveats too. It is simply not compliant with CE norms concerning safety.
The biggest problem is that it's not a single point risk. It's a long list of possible problems, ranging from electrocution (to safely operate them according to manufacturer's specs, you have to do so outside, but they are not IP65 (safe against continued exposure to water rays, which is what you have in medium to heavy rain)) and workplace air purity (the filter bag does not comply with the norms for clean air in the work space, so whatever air comes out of it needs to be filtered further), to fire and explosion (the duct type and the "blow through" fan charge the wood particles with static electricity, causing permanent sparks, and the filter volume is not separated from the collection volume, so there is always an optimum point for explosion present (in the collection bin there is 100% dust, in the in-flowing air there is a low concentration in between machine operations (far below explosion point), so somewhere in that volume, that gradient passes the explosion point.
If you want to operate such a filter, it needs to be encased in a fire proof housing, equiped with an automatic fire extinguisher and an explosion panel. If the exhaust meets the right criteria, you can use it indoors, but at all times it is still advised to use it outdoors in free airflow (open on 4 sides) with a safe zone on the side of the explosion panel to allow for flame burst to go unhindered. And as soon as you're talking about an air-tight containment housing, you might as well make it vacuum, increasing efficiency, safety and durability just by adding a few internal supports and moving the fan to the opposite side of the box.
Certain Chinese manufacturers of woodworking equipment will give one of these single-bag filters for free as a promotional stunt, but in truth it's because they can't sell them anymore, and they can only be used in a demonstration setup where no actual woodworking is done. They are dangerous, and if you must use them, use them outdoors and NOT in combination with flex-tubes. (and again, if you must do some parts with flex tubes, or if you use pvc pipes instead of metal ones, GROUND IT. Connect the spring wire of the flex tube to the chassis of the filter and the machine and make sure the filter is properly grounded. Run a naked copper wire through pvc pipe and ground it to avoid static charge build-up. But in general, just use proper metal rigid tubing.) The worst flex tubes are the opaque ones with tight ridges, because they don't have a metal spring that you can use for grounding, and the ridges collect a crust of the finest dust that has been run through it, begging to start a smoldering fire. Note that such fires can go unnoticed for hours, until the workshop suddenly burns down in the middle of the night. This happens all the time because this industry is plagued with complacency, laziness and a habit of uninformed budget cutting (read: corner cutting)...
With regard to his filter box: that one's even worse than the filter he already had. There is absolutely no collection of the dust that is stopped by the final filter, and as he noted himself: the seals don't work so it's blowing the finest dust all over the place, rendering the entire thing pointless. He may just as well use shop air and deliver air puffs on his tool every few seconds.
But I don't want to tear down the idea of making better dust separation. Quite the contrary. Out of experience, I know that multi-stage separation is the best. Of course, if you want an all-purpose filter that can handle any kind of dust or chips very well, you'll need 5 stages or more easily. When using a vacuum filter, you place the (commercial) filter all the way at the end, and any separation modules you add in front of it, will increase the efficiency without compromising on security.
The first separation that should be added, is a pressure drop unit. Just a sudden massive increase of diameter of the pipe line (insert a huge box with a lid at the bottom that is sucked closed by the vacuum and opens automatically when the filter is shut off, dropping whatever was separated out. Length will determine particle size that will be caught. Positioning the exit of this box slightly higher than the inlet will also drive down the particle size. But this is usually used for larger chips and off-cuts larger than 0.5". Next would be such a cyclonic separation, where size determines efficiency and particle size. Ideal is to have multiple cyclones of growing size. Having an air-flow regulator in front of the inlet of the final filter will also allow for better efficiency when filtering out very light chips or very fine dust. And for the final stage, it is important to use slick anti-static filter material. The filter that is used in the box here, is neither.
This is just a short excerpt of what I would consider essential knowledge before tinkering with dust collection systems... There is much much more to think about, but I think I'm already overdoing it here...
Throughly enjoyed watching. We all have made mistakes and have bins full scraps to prove it. Thanks for keeping it real. I appreciate the challenge and efforts of the project and can only imagine the long hours of editing the footage. Thank you for publishing this entertaining video.
"looks about right" is the level of at home engineering that perfectly combines effectiveness and enjoyability.
i just watched this @ 1.5 speed and you are a certified genius, hilarious, and two microns from death
well done