Thread: The Generic 2HP DC

Most newer units of all HP ratings are going that way, IMHO it's also a simpler and lower cost way to make it.

So the timbecon dusty (for someone not fond of metalwork or modifying expensive machinery) would essentially give me a unit similar to what BobL built? Obviously paying a premium though... but still

I have the Timbecon dusty - the DC-1750 as posted - Overall I think is a very good unit. Its been here 6 weeks (??)

BUT I do have to qualify an overall positive feeling on it by saying it does need more cleaning maintenance than normal.

The main barrel of the unit does not have the separator donut, so a good deal of dust goes up into the filter. I bought the 1200mm tall PF and think that this model absolutely needs it. The smaller 600mm PF would be completely overwhelmed. It is quite a violent suction for a 2HP motor.... more than I would have expected.

It is attached to 6" pipe, 3 metres of it.

For maintenance, I have attached a rope to the paddle handle and fling it around before work every day. A very considerable quantity of dust comes down. The paddles (only 3 per side and not big at that) I jammed hard into the pleats. This gives it a good clean but the downside is it is tight/hard to turn. This is why the rope. The unit is in the corner and the paddles have only one handle (not one per side as normal) - so I cannot get around to the back... the rope helps pull it around and works reasonably well.

It really needs a donut and I'm definitely going to make one - actually an internal Thein separator.

The suction after a clean is incredible. I've experienced 3HP machines and this is easily equivalent. The volume of air is impressive and has kept all of my work impressively clean. As per BobL, I'm in the process of making everything 6" ports and using his hand made Bell Mouthed Housings.

Originally Posted by woodPixel

I have the Timbecon dusty - the DC-1750 as posted - Overall I think is a very good unit. Its been here 6 weeks (??)

BUT I do have to qualify an overall positive feeling on it by saying it does need more cleaning maintenance than normal.

The main barrel of the unit does not have the separator donut, so a good deal of dust goes up into the filter. I bought the 1200mm tall PF and think that this model absolutely needs it. The smaller 600mm PF would be completely overwhelmed. It is quite a violent suction for a 2HP motor.... more than I would have expected.

It is attached to 6" pipe, 3 metres of it.

For maintenance, I have attached a rope to the paddle handle and fling it around before work every day. A very considerable quantity of dust comes down. The paddles (only 3 per side and not big at that) I jammed hard into the pleats. This gives it a good clean but the downside is it is tight/hard to turn. This is why the rope. The unit is in the corner and the paddles have only one handle (not one per side as normal) - so I cannot get around to the back... the rope helps pull it around and works reasonably well.

It really needs a donut and I'm definitely going to make one - actually an internal Thein separator.

The suction after a clean is incredible. I've experienced 3HP machines and this is easily equivalent. The volume of air is impressive and has kept all of my work impressively clean. As per BobL, I'm in the process of making everything 6" ports and using his hand made Bell Mouthed Housings.

Thanks for the write up. I was always under no illusion that the maintenance for me would be considerably more than most dustys. But at the same time i think my time in the workshop will be a lot less too. I still play sport year round on a Saturday, so at best i'll be one full day a week in the shed (and that scenario will rarely occur). So i'm happy to make the tradeoff.

So looks like my dusty cost seems to have shot up a couple hundred dollars now hahaha

The first one listed is 1hp and the 2nd 0.75 hp. So while the build is similar to the one BobL modified, the airflow is a lot lower (500CFM and 680CFM, quoted, respectively) which in real life, hooked up, will be a lower. With all the mods. on my 2hp (quoted as 1200 CFM in the adverts with no mods) the best I've achieved, with no filter attached and no long inlet pipes, was approx. 900 CFM.

As Lappa says the 1HP versions have impellers that are too small to move much air so they can't really take advantage of this arrangement.
The others are better but the arrangement/orientation of the impeller to the bag housing is actually a minor factor.
The bigger factor is making sure the entrance and exit of the impeller is increased.
If the impeller continue to use 4" or 5" entry ports and 5" exit port then the re-orientation is a waste of time.

. . . . I'll be getting myself a 2hp dusty, but shudder at the thought of having to modify it...

Yeah its not for everyone but you might like to take a look at Johnnos all wood mod
5in Flex or 4in DWV pipe?

Originally Posted by woodPixel

For maintenance, I have attached a rope to the paddle handle and fling it around before work every day. A very considerable quantity of dust comes down. The paddles (only 3 per side and not big at that) I jammed hard into the pleats. This gives it a good clean but the downside is it is tight/hard to turn. This is why the rope. The unit is in the corner and the paddles have only one handle (not one per side as normal) - so I cannot get around to the back... the rope helps pull it around and works reasonably well.

I saw something somewhere (possibly a youtube but I cannot find it) the other day where the author had the same problem with his paddle handle for his pleated filter as it was in a corner too. What they did was to remove the single handle and replace it with a plywood wheel a bit larger in diameter than the pleated filter. Handholds were cut into the plywood disk all around the perimeter, so that it could be grabbed and turned no matter what the orientation of the disk.

I hope that is understandable.

Cheers

Doug

Originally Posted by Lappa

The first one listed is 1hp and the 2nd 0.75 hp. So while the build is similar to the one BobL modified, the airflow is a lot lower (500CFM and 680CFM, quoted, respectively) which in real life, hooked up, will be a lower. With all the mods. on my 2hp (quoted as 1200 CFM in the adverts with no mods) the best I've achieved, with no filter attached and no long inlet pipes, was approx. 900 CFM.

I was more commenting on the design of the smaller Dusty's being the same a BobL and Johnno's mods, motor position, the bit that goes into the bags etc. More pointing out that they build them like that for smaller useless Dusty's but not for the 2hp models... then i saw the timbecon site... that has the 2hp in the BobL/Johnno deisgn.

Originally Posted by BobL

As Lappa says the 1HP versions have impellers that are too small to move much air so they can't really take advantage of this arrangement.
The others are better but the arrangement/orientation of the impeller to the bag housing is actually a minor factor.
The bigger factor is making sure the entrance and exit of the impeller is increased.
If the impeller continue to use 4" or 5" entry ports and 5" exit port then the re-orientation is a waste of time.

Yeah its not for everyone but you might like to take a look at Johnnos all wood mod
5in Flex or 4in DWV pipe?

Yeah i saw that too, looks awesome with the wood. But it still involves a bit of metal cutting/welding supports for the motor that i'm not confident enough to carry out.

I'd rather buy one (and pay a premium ) already done rather than risk buying one, modifying it, effing it up and having to buy another...

Don't get me wrong, i like trying new things and pulling things apart, but it'd be a rather expensive mistake to make and i'd like to avoid that (ok, i'd more like to avoid explaining to my wife why i have to buy a second dusty, and how i've managed butchered the first haha).

Originally Posted by Dibbers

I was more commenting on the design of the smaller Dusty's being the same a BobL and Johnno's mods, motor position, the bit that goes into the bags etc. More pointing out that they build them like that for smaller useless Dusty's but not for the 2hp models... then i saw the timbecon site... that has the 2hp in the BobL/Johnno deisgn.

That design has been around for many years, but usually on higher HP machines but has been on smaller designs. I've seen it on machines from the late 1990s. It's a more efficient design which is probably why BobL suggested that mod to a 2HP machine with the pump on the floor which have become common units for the small shed.
The Timbecon 2hp unit has its pros and looks the biz, but it also has some problems as Woodpixel outlined. Also it's a big step up in price - even $200 dearer than a 3 hp machine, but I must admit I've been tempted as mentioned previously but I have space problems in my dusty shed. The 3 hp design would allow me to locate a Thien filter outside which would mean I could use the same shed
The problem with them all is that they quote specs out of the blue and you can two identical looking units from outside but with different impellor sizes and shapes.
Thats why I have offered my anemometer so we can get some real specs. from these machines.
I'm as confused as well re my next purchase and I'm not sure businesses would be impressed if I walked in with an ammeter, manometer and anemometer for a test drive

Originally Posted by Lappa

That design has been around for many years, but usually on higher HP machines but has been on smaller designs. I've seen it on machines from the late 1990s. It's a more efficient design which is probably why BobL suggested that mod to a 2HP machine with the pump on the floor which have become common units for the small shed.
The Timbecon 2hp unit has its pros and looks the biz, but it also has some problems as Woodpixel outlined. Also it's a big step up in price - even $200 dearer than a 3 hp machine, but I must admit I've been tempted as mentioned previously but I have space problems in my dusty shed. The 3 hp design would allow me to locate a Thien filter outside which would mean I could use the same shed
The problem with them all is that they quote specs out of the blue and you can two identical looking units from outside but with different impellor sizes and shapes.
Thats why I have offered my anemometer so we can get some real specs. from these machines.
I'm as confused as well re my next purchase and I'm not sure businesses would be impressed if I walked in with an ammeter, manometer and anemometer for a test drive

Yeah the 3hp would be ideal, but a tad oversized in terms of footprint for a single car garage with no capability to house outside (strata). If the timbecon model is as close an out of the box solution as i can get, then I'll pay the extra for it (begrudgingly) as im not confident i wouldnt kill a cheaper 2hp dusty while trying to mod it.

I can live with more frequent maintainence if need be.

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If you want me to do some tests on the DC-1750 I'm more than happy to do so.

I have a Wattmeter, but it's hardly scientific. Its just a household thing (its on my sons PC, which consumes power like we own a nuclear generator or something). The initial amps might destroy it, but its for science!

If someone want to lend me their manometer and anemometer Ill use these as instructed too. Using the same gear will give a known calibrated reading.

Evan

I can send the anemometer but the manometer may be a problem due to size. It's just some 1/4" plastic tube with coloured water attached to a plank of wood in a U shape.

I can send the anemometer but the manometer may be a problem due to size. It's just some 1/4" plastic tube with coloured water attached to a plank of wood in a U shape


IMG_0892.jpg

I made a blanking plate so I can block the 6" pipe to get static pressure. It's just some close cell foam glued to a block of wood with a connection to the manometer hose in the centre.

IMG_0893.jpgIMG_0894.jpg

You connect one end end of the manometer to the plate, block the pipe with the blanking plate, with the DC running, and measure the height between the two coloured liquid levels in the tubes.

The Inductive ammeter I use for current flow is works so I can't send that but I have a "split" section of 240v wiring lead with plugs so you can connect into the DC lead and attach an inductive ammeter if you can find one. I have a 10A plug type and a 15A plug type.
Let me know if you want me to send the anemometer and measuring lead.