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Thread: The Generic 2HP DC
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7th August 2013, 09:24 PM #46.
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The biggest load you can put on an electric motor used on a DC is to move maximum amount of air ie when it has no restrictions. The more ducting and machinery ports that are added the slower the flow and the lower the current.
If you are really buying a generic 2HP DC yYou can probably save yourself the cost of a current meter as it will not pull more than about 6A continuous no matter what you do to it.
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7th August 2013 09:24 PM # ADSGoogle Adsense Advertisement
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7th August 2013, 10:55 PM #47Intermediate Member
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Thanks for your help Bob. I will get onto this.
Cheers
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12th August 2013, 03:47 PM #48
I am getting there. Bought a table saw last November but have only just got it into workshop, still in the box. Mostly do metalwork and huge amount of arrangements to make on all fronts. Also bought a Milling Machine (not your sort) on same day. I only started looking at DC this morning as I was meant to get one on the day but clean forgot. Good thing. I will finish reading the thread now.
Dean
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12th August 2013, 04:09 PM #49
Ok I have finished reading the thread and had a look at Jonno's as well. I have a limit financially and also to a 2hp unit due to power constraints. I also have limited space and was going to position the DC outside. I still will if it can be done.
Is one of these generic units the best way to go as opposed to say buying bits and making your own in terms of overall performance?
Either way I will be copying the mods in these threads. I will no doubt have more questions later.
Dean
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12th August 2013, 05:11 PM #50.
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This is another "how long is a piece of string question"
What do you mean by bits and pieces?
If you plan to use a 1HP motor on a 10" impeller and use an old footy sock for a filter then no.
It is unlikely you will be able to buy the components for a 2HP DC much cheaper than a complete unit especially if you get a second hand one.
You need to bear in mind that "any 2HP system" will simply not maintain the generally accepted 1000 cfm @ 4000 fpm anyway.
If you want to build a bits and pieces DC that clearly meets these specs then I would start with a 3 phase 4HP motor with a VSD.
You will need an efficient 15 or 16" impeller - you will be battling to find one of these anywhere.
Then you need either an efficient cyclone of some filter bags and their housing.
AT this stage you may wish you had purchased a ClearvueLast edited by BobL; 23rd May 2019 at 10:27 PM.
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12th August 2013, 10:08 PM #51
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12th August 2013, 10:23 PM #52I got sick of sitting around doing nothing - so I took up meditation.
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12th August 2013, 11:44 PM #53.
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13th August 2013, 11:55 AM #54
Survives What LOL? I hadn't even thought of second hand which is unusual for me. I will keep an eye open, maybe both. I would be happier to chop it up then.
Doug
You would have to remember the zip! It would increase the micron size, but if it was outside it wouldn't matter so much.
Dean
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16th October 2013, 09:58 PM #55Some days we are the flies; some days we are the windscreen
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16th October 2013, 11:26 PM #56.
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Nope. Maybe this is stating the obvious but just in case, the outside wall of the flange connecting the impeller to the bag housing should line up tangentially with the outer wall of the bag housing as per the diagram on the left.
Also I would not reverse the flow direction as per the diagram on the right.
And is the size of the hole solely determined by the length of the arc that corresponds to the size of the impeller outlet? Trav
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17th October 2013, 07:50 AM #57
Thanks bob. Just what I thought, but best to check before I begin surgery.
TravSome days we are the flies; some days we are the windscreen
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12th November 2013, 10:14 AM #58... and this too shall pass away ...
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VFD on 2 HP dusty
I am much impressed by Bob's optimisation of a 2 HP dusty. It provides an inexpensive DC solution.
Just wondering ... was wandering around ebay and found 2 HP VFDs for between $90 and $150. I am electrically challenged, so my question is does it seem feasible to get an inexpensive FVD and run the 2 HP motor at 60 Hz?
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12th November 2013, 12:05 PM #59.
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The 2HP machines are single phase so a VFD will not work on these.
The motor could be replaced with a used 3 phase 2HP delta wired motor since these are relatively cheap and being only 2HP could possibly be spun a bit faster e.g. 65 Hz but I expect noise will become a problem.
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12th November 2013, 01:17 PM #60... and this too shall pass away ...
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