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  1. #1
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    Default Idea for Carbatec 2.75HP DC Modification / Ducting Layout for Feedback

    After months reading and re-reading this forum, I have hatched a plan.

    My thinking is to use parts from the most powerful 10A DC I can find, which is the Carbatec DC2300P and Frankenstein them together to make a custom wall mounted DC.
    The aim is to reduce the footprint and try to get sufficient flow.

    The DC2300P is apparently 2.75HP, has a 150mm port and can pull (I’m wincing as I type) 1800CFM.
    Here’s a link to the full machine…
    Carbatec Professional Twin Bag Dust Collector | Carbatec

    Rightio, here’s the plan:

    • Buy the motor / impeller / cowling part ($502)
    • Buy left hand side bag and filter holder / cowling part ($75)
    • Buy pleated filter ($289)
    • Make an adapter to connect the impeller cowling to the filter cowling
    • Mount to the wall
    • Win the championship


    I’d love to hear feedback on the reconfigured machine, and on my proposed ducting layout - see attached images.

    Further thinking:

    • I’m not sure if the reduced surface area of a single sided system is going to kill the vibe - maybe the increased area of the pleated filter could help, but I’m just guessing.
    • Is there any reason I can’t swap the collection bag out for a drum, provided I can get a good removable seal?


    Feel free to call me an idiot straight up. I’ll totally understand.


    Cheers,
    Kristen.

    Modifed DC - Ver A.png
    Ducting Layout - Ver A.png

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  3. #2
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    Saskatoon, SK, Canada.
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    Default

    Can you put that thing in the carpark, which I assume to mean a covered carport and not an open driveway? Can you put it outside on the 4.2M side? Enclosing it in a lean to shed in either location? If you can then you can keep the 5 micron bags and not spend on the cartridge.

    If you go from the double filters to a single you will restrict it back to the flow of a 2 HP DC.

    If you can external shed the DC you can gain a touch better flow by mounting the motor to the ceiling and then attaching the filter rings in their normal orientation. With the motor up high the duct goes straight into the shop, eliminating some elbows.

    Now you can come back with your reasons for not mounting outside. Even if you have to stay inside consider the DC mounting at the ceiling level to straighten out the duct. Use both filters.

    Pete

    Forgot to say. Welcome to the forum!

  4. #3
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    Jul 2021
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    Maroochydore
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    Default

    Thanks for the welcome and for your reply, Pete.
    Really appreciate it.

    If you can external shed the DC you can gain a touch better flow by mounting the motor to the ceiling and then attaching the filter rings in their normal orientation. With the motor up high the duct goes straight into the shop, eliminating some elbows.
    The shop (and our house) is in a set of industrial sheds. Car park is common property so can't have the DC outside.
    I've lifted the motor to reduce elbows, and am now showing an option with dual filters.
    See the attached images.

    If you go from the double filters to a single you will restrict it back to the flow of a 2 HP DC.
    I thought that the single filter might kill the flow.
    Before I write the idea off, what if I increase its height/surface area?
    I'm really keen to explore footprint shrinking options before I proceed with the dual filter option.

    Thanks again.

    Ducting Layout - Ver B.png
    Modifed DC - Ver B.png

  5. #4
    Join Date
    Apr 2019
    Location
    NSW
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    37
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    Default

    For a very similar price, for what is going to be a very very similar unit you can buy the dc7 style Extractor from sydney tools

    Sydney Tools

    $650

    You have to however modify the inlet port to take 150mm pipe. I did it here with some MDF, araldite glue and some pvc pipe
    New dust extractor reccomendations and build log

  6. #5
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    Default

    For a very similar price, for what is going to be a very very similar unit you can buy the dc7 style Extractor from sydney tools

    Sydney Tools

    $650

    You have to however modify the inlet port to take 150mm pipe. I did it here with some MDF, araldite glue and some pvc pipe
    New dust extractor reccomendations and build log

  7. #6
    Join Date
    Jul 2021
    Location
    Maroochydore
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    Default

    Thanks @havabeer69

    You have to however modify the inlet port to take 150mm pipe. I did it here with some MDF, araldite glue and some pvc pipe
    I see that later in your thread you upgraded to a new Laguna DC. How does it compare?
    Makes me wonder if the cheaper unit is worthwhile if you upgraded your system so soon after the original build.

    Seems from all the comments in the 2HP Mods thread that it's critical to match the out flow to the intake.
    I wish I had measured the rectangular outlet section on the DC unit I was looking at last weekend.
    Probably worth the 2.5 hour round trip to Brisbane to make sure.

  8. #7
    Join Date
    Oct 2009
    Location
    South Africa
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    950

    Default

    Quote Originally Posted by Kristen View Post
    I'm really keen to explore footprint shrinking options before I proceed with the dual filter option.

    Thanks again.

    Ducting Layout - Ver B.png
    Modifed DC - Ver B.png
    I’ve got the same generic DC as shown in your Original Unit. I’ve mounted it upside down in my carport, mostly because if it’s the right way up I can’t get a car in that side, but by having it hang from the roof, I can squeeze a car’s bonnet underneath the bags.

    Basically in addition to reducing the elbows, it maximises the floor space available.

    And welcome from me too.
    Attached Images Attached Images

  9. #8
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    Helensburgh
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    HP means nothing, it is the impeller size that is critical and that should not be less than 14". A given size of impeller, let's say 14" if driven by a 5hp motor or a 50hp motor will not pump any more air if both motors are turning it at the same RPM and developing or buying a system with a smaller impeller than 14" is in all honesty not allowing you to get the ultimate result for your efforts. The bigger the impeller the slower it can be run and the less noise will be made and using a system with a 3 phase motor and a VFD will allow you to control the speed and noise. I would not buy a single phase dust extractor for a bet even if I was given the money, you don't need 3 phase when a VFD can be used to supply the 3 phase.
    CHRIS

  10. #9
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    Perth
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    The other limiting factor is duct size.
    If you connect up a 6" duct to that DC will be about 1200 CFM. Then its downhill form there with ducting, junctions restricted machine points, clogged filters - In practice think<1000 CFM for short ducting runs and no junctions.

    If you were to use 9" ducting you would get a bit more flow but not enough to make it worth while AND the price of the fittings will cause your credit card to self combust.

  11. #10
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    Jul 2021
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    Maroochydore
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    Default

    Thanks for your suggestions and comments, fellas.

    Quote Originally Posted by BobL View Post
    The other limiting factor is duct size.
    If you connect up a 6" duct to that DC will be about 1200 CFM. Then its downhill form there with ducting, junctions restricted machine points, clogged filters - In practice think<1000 CFM for short ducting runs and no junctions.
    I was kinda aiming for 1000CFM - I'd have been stoked if I could get that at the table saw / drop saw.
    Seems unlikely as I've got ducting layout inspired by MC Escher.
    See images...
    Ducting Layout - Ver C.png Ducting Section - Ver A.png

    Quote Originally Posted by Chris Parks View Post
    HP means nothing, it is the impeller size that is critical and that should not be less than 14". A given size of impeller, let's say 14" if driven by a 5hp motor or a 50hp motor will not pump any more air if both motors are turning it at the same RPM and developing or buying a system with a smaller impeller than 14" is in all honesty not allowing you to get the ultimate result for your efforts. The bigger the impeller the slower it can be run and the less noise will be made and using a system with a 3 phase motor and a VFD will allow you to control the speed and noise. I would not buy a single phase dust extractor for a bet even if I was given the money, you don't need 3 phase when a VFD can be used to supply the 3 phase.
    I'm a bit overwhelmed by all the variables at the moment, Chris.
    Sounds like no matter what I do, I'll be revisiting the system in a year or two.
    Might see how I go with trying to get the most out this model with 150mm ducting.

    Quote Originally Posted by Colin62 View Post
    I’ve got the same generic DC as shown in your Original Unit. I’ve mounted it upside down in my carport, mostly because if it’s the right way up I can’t get a car in that side, but by having it hang from the roof, I can squeeze a car’s bonnet underneath the bags.

    Basically in addition to reducing the elbows, it maximises the floor space available.

    And welcome from me too.
    Cheers for the welcome, Colin.
    I like the idea of suspending the bags. Any issues with them slipping when they start to fill?


    For those following along, here's a few extra bits of info...
    - Impeller is 14.5"
    - Original duct from impeller to bags is 160 x 116mm (pretty close in sectional area, but I assume rectangular duct isn't as efficient as round)
    - I'll be replacing the existing intake port with an MDF Bellmouth Port / PVC fitting

    Here's a diagram showing the proposed mods to date.
    I'm sure that these will change once I get the unit, but it's a start.

    Modifed DC - Ver C.png

  12. #11
    Join Date
    Oct 2009
    Location
    South Africa
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    Default

    Quote Originally Posted by Kristen View Post
    Cheers for the welcome, Colin.
    I like the idea of suspending the bags. Any issues with them slipping when they start to fill?
    No issues so far, there is a lip there and the straps are quite tight. I’ve been running it like that for a couple of years.

    I’m a woodturner mostly and the DC is for the lathe. It doesn’t collect most of the chips (they fly off too fast to be sucked back), and I don’t use the floor sweep anymore, so it takes a long time to fill the bags. If I spent as much time turning as I’d like to, they might fill a lot quicker.

  13. #12
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    Quote Originally Posted by Colin62 View Post
    No issues so far, there is a lip there and the straps are quite tight. I’ve been running it like that for a couple of years.

    I’m a woodturner mostly and the DC is for the lathe. It doesn’t collect most of the chips (they fly off too fast to be sucked back), and I don’t use the floor sweep anymore, so it takes a long time to fill the bags. If I spent as much time turning as I’d like to, they might fill a lot quicker.
    Nice. I'm going to use the same idea.
    Even just to be able to sweep around them more easily would be helpful. .

    Not being able to spend enough time in the shop seems like a standard cry in here.
    I guess solutions for that problem have been moved to another thread.

  14. #13
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    Quote Originally Posted by Kristen View Post
    I'm a bit overwhelmed by all the variables at the moment, Chris.
    Yes it can be a bit like that but in the end it becomes quite simple, the bigger the impeller the more air is moved and to move that air for the average workshop such as yours use 150mm pipe, job done. Just remember that any reduction in diameter in the ducting smaller than 150mm will restrict the air flow to what the smaller diameter can flow.
    CHRIS

  15. #14
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    Kristen if you did find the bags were popping off you can always hang brackets off the wall with a platform to take the weight or make a short table. The space under to store some stuff. Shops always seem to have extra stuff.

    Pete

  16. #15
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    Quote Originally Posted by Chris Parks View Post
    Yes it can be a bit like that but in the end it becomes quite simple, the bigger the impeller the more air is moved and to move that air for the average workshop such as yours use 150mm pipe, job done. Just remember that any reduction in diameter in the ducting smaller than 150mm will restrict the air flow to what the smaller diameter can flow.
    Roger that, Chris.
    Cheers mate.

    Now to source some blast gates that suit PVC pipe...
    Should be super easy.

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