I read that for cyclones, having a bigger outlet means reducing air resistance and also reducing the speed of the air flow at the outlet, which increases separation. Or so says Bill Pentz, I am wondering if this applies for thien style separators as well? Most people seem to build their separators with identical sized inlets and outlets.
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#61
Thien Cyclone Separator Lid Discussion / Re: Planned dust collection system
January 11, 2015, 03:48:32 PM #62
Thien Cyclone Separator Lid Discussion / Re: Planned dust collection system
January 01, 2015, 03:43:25 AM
So I'm not really progressing here because I don't have a motor I can build from, well I have the 4kw beast but I need it for my jointer/planer. I'm only willing to pay scraps for a used induction motor and so I have to be patient and wait.
But in the meantime I wonder if the separator design that matthias wandel used for his dust collector build has been covered in discussions? Tried searching for his name but did not find much all three mentions of his name are in this thread. I would have thought someone might have been interested in comparing his design vs. the top hat style. The main difference seems to be his is taller.
But in the meantime I wonder if the separator design that matthias wandel used for his dust collector build has been covered in discussions? Tried searching for his name but did not find much all three mentions of his name are in this thread. I would have thought someone might have been interested in comparing his design vs. the top hat style. The main difference seems to be his is taller.
#63
Thien Cyclone Separator Lid Discussion / Re: Planned dust collection system
December 06, 2014, 03:51:53 PM
My motor turns slower than Wandels impeller actually because we use 50hz in Finland, so if I made it to the same size it would be less effective, and probably draw very little power. It could be scaled up a little bit, but it would turn slower and probably be under less stress than his impeller if I made it.
The 4kw motor has a 9.5amp fuse on its control box, more than that it shouldn't use except for short bursts during startup. 400 volts of current does help keep amperage down.
I live somewhat half-way rural, I got neighbors within 10-15 meters of my garage, but if I vented it towards one side, I doubt it would be able to bother anyone, since the DC isn't active all the time and we're probably talking small amounts and it'd be in another direction where there is noone.
The 4kw motor has a 9.5amp fuse on its control box, more than that it shouldn't use except for short bursts during startup. 400 volts of current does help keep amperage down.
I live somewhat half-way rural, I got neighbors within 10-15 meters of my garage, but if I vented it towards one side, I doubt it would be able to bother anyone, since the DC isn't active all the time and we're probably talking small amounts and it'd be in another direction where there is noone.
#64
Thien Cyclone Separator Lid Discussion / Re: Planned dust collection system
December 05, 2014, 06:35:20 AM
My 4kW motor powers my planer right now, I have no dust collection aside from a small home made shopvac with a small cyclone. What I meant was I could reuse the motor for a DC system. I have no fan for it however.
The idea that the dust outside could travel far and be dangerous to anyone sounds unbelieveable, any data on that? Surely living in a city must be worse given the air pollution and particulate matter in the air from ordinary dust. This sounds even more excessive than bill pentz pages now.
The idea that the dust outside could travel far and be dangerous to anyone sounds unbelieveable, any data on that? Surely living in a city must be worse given the air pollution and particulate matter in the air from ordinary dust. This sounds even more excessive than bill pentz pages now.
#65
Thien Cyclone Separator Lid Discussion / Re: Planned dust collection system
December 05, 2014, 12:43:50 AM
Not a lot of traction, but I guess most of this has been covered on this forum so far. But I have a specific question I'd like an answer to. I plan to use 150-160mm ducting in the ceiling and to the dust collector itself as I mentioned. But many of the ports on my machines are maybe 100mm or less.
Am I right though in making a "backbone" or main stem from thicker ducting while having smaller hoses and pipes to individual machines? Or is it a waste of piping?
Am I right though in making a "backbone" or main stem from thicker ducting while having smaller hoses and pipes to individual machines? Or is it a waste of piping?
#66
Thien Cyclone Separator Lid Discussion / Planned dust collection system
September 24, 2014, 03:30:25 AM
Greetings from Finland.
I'm currently building a garage that will be partially dedicated to a woodworking workshop. It's close to done and I've been considering dust collection options. I've done a lot of research and asked a lot of questions and what I've come to is I should aim for the following:
-Metal ducting in the size of 150-160mm (I think 5-6.3", metal because it grounds easily, no static issues with dust clinging)
-Ducting in the ceiling rather than walls where possible
-Vent outside (just seems like the best way avoid a lot of potential issues)
-Powerful blower. I have a 3-phase 4kw motor I plan to use in a jointer/planer, somewhat overkill for the small 8" machine I have, but I got it cheaply. I guess it can be refitted later for to a dust collector impeller/fan and be more suited to that task.
I was looking at cyclone separators and I am currently building my own shop vac from leftover parts and a cheap cyclone I bought from china. I was considering building a big one from Bill Pentz designs but since I am venting outside, and also reading Matthias Wandels experiences with his thien baffle system, it seems like this system is entirely adequate in separating most dust and chips and most fine saw dust. I gather there's some contention between cyclone and thien baffle users as well...
Anyway it seems like it works well and well enough for my purposes. I am wondering are there any guidelines for what size I should build given a certain airflow/speed? This will be a large and powerful system, though hopefully it should come out pretty cheap since I am building it myself from spare parts and 2nd hand stuff.
I'm currently building a garage that will be partially dedicated to a woodworking workshop. It's close to done and I've been considering dust collection options. I've done a lot of research and asked a lot of questions and what I've come to is I should aim for the following:
-Metal ducting in the size of 150-160mm (I think 5-6.3", metal because it grounds easily, no static issues with dust clinging)
-Ducting in the ceiling rather than walls where possible
-Vent outside (just seems like the best way avoid a lot of potential issues)
-Powerful blower. I have a 3-phase 4kw motor I plan to use in a jointer/planer, somewhat overkill for the small 8" machine I have, but I got it cheaply. I guess it can be refitted later for to a dust collector impeller/fan and be more suited to that task.
I was looking at cyclone separators and I am currently building my own shop vac from leftover parts and a cheap cyclone I bought from china. I was considering building a big one from Bill Pentz designs but since I am venting outside, and also reading Matthias Wandels experiences with his thien baffle system, it seems like this system is entirely adequate in separating most dust and chips and most fine saw dust. I gather there's some contention between cyclone and thien baffle users as well...
Anyway it seems like it works well and well enough for my purposes. I am wondering are there any guidelines for what size I should build given a certain airflow/speed? This will be a large and powerful system, though hopefully it should come out pretty cheap since I am building it myself from spare parts and 2nd hand stuff.