Las Vegas FOG Tool Training!

[danrush]

Hey Per,

Thanks for your thoughts on your Vegas meeting.  This is, I'm sure, just the first of many questions from this ol' carpenter.  Regarding hooking up two ct's together for extra suction...  ( I can't look at mine right now, they're on jobs) 

1st, How's it done?

2nd, Why?  (sorry for such a neophyte question, I'm still struggling with cfm, hose volume, velocity, etc)  I know what I want from dust collection, just don't know how it works.

Thanks again, Dan

 

[Frank Pellow]

with all due respect...

could we save the computer conversation to the off topic thread?

Thanks

Per

Per, I already appologized for my part in the tangent and said I would stop (which I have done).

 

[Dave Ronyak]

Dan,

You simply hook up those vacuum units in series.  Put one end of a 50mm hose (the size supplied with a Boom Arm) into the outlet of the first CT vacuum machine and the other end into the inlet of the second vacuum machine.    A 36mm hose will likely also work, but the more air flow capacity of the hose connecting the two vacuum machine units, the better should be the resulting performance.

Dave R.

 

[danrush]

Dave,

Thanks for the how's.  I'm still struggling with the why's.  If I'm asking about what has already been covered in other threads, please feel free to reprimand me and send me back to the library for more study time.

For example:  We know now that the Kapex has a dust collection rate of 91%.  (with I assume a ct22)  If I hook up two ct's in series, does collection improve?  By how much?  Why? 

I know these are simple questions, I've been trying to wrap my brain around dust collection for a bit now as I redesign my shop. 

Thanks, Dan

 

[nickao]

I have two virgin CT 33 sitting here. I would like to see the math on how two in series makes a difference. I may give it a try tonight to see what happens.

Nickao

 

[Steve Jones]

Plug 'em both into each other inlet to outlet making a complete loop!

(c'mon, where's your sense of adventure?)

Probably get enough air flowing the suckers will levitate

 

[Qwas]

Plug 'em both into each other inlet to outlet making a complete loop!

(c'mon, where's your sense of adventure?)

Probably get enough air flowing the suckers will levitate

Yeah Nick, and use a really long extension cord and take a flashlight. I'll let you know if I can see you down here in Georgia.

Festool Airlines. Has a ring to it.

 

[Dave Ronyak]

Dan,

I cannot answer that question.  There is no data available to me on the effects of connecting two CTs in series.  The Festool trainer demonstrated the hook-up and powered them up when connected, but there was no comparison test.  It's not clear as to whether the volume of air, the amount of suction or both is increased.  Brain Sedgeley's guess was that both are improved.  Even if that is correct, it is still unknown if this tandem vacuum system would improve dust collection from a Kapex.  My guess is that an improvement in volume of air pulled into the vacuum machine from the back of the Kapex would result in an increase in the amount of dust collected, but that is just a guess.  Someone who has access to the needed equipment will have to try various setups and measure the amount of sawdust that is collected for each, and let us know, unless Brian S. tries it at a Festool training center and lets us know.   Anyone interested in this might keep in mind that running 2 CTs at full power is likely less efficient than running a small cyclone dust collector designed to draw a much higher volume of air, e.g. a 1 1/2 HP Oneida or competitor unit.

Dave R.

 

[Brice Burrell]

Festool Airlines. Has a ring to it.

Per flew to Vegas on Festool Airlines, check out his avatar.

 

[Per Swenson]

Here,

This how I get around.[attachimg=#]

Per

 

[PeterK]

That picture on page one with Per in the background, arms folded, smirk on face, showed me he was gloating over the rest of us about his getting to go and us staying home!! Now I know it is true with his flying on Festool Air  ;D
Pete

 

[Per Swenson]

Dan,

Humble carpenter to another, one of my cts is on the job also,

and ones here. And I have no real world idea of the effects.

But a increase of CFM sure sounds plausible.

Dave McGibbon(Festool tech wizard)suggested you could keep on hooking them together,

he also mentioned vacuum bagging. So lets let one of my more esteemed

note takers and tech savvy fellas to finger this out.

Per

 

[nickao]

No matter what you do the size of the hose will place a limitation on how much air flow there will be. At some point, unless you increase the diameter of the hose, only so much dust is going to get through the hoses.  I think this point is going to happen long before you can add a third unit.

I will see if I can work out the calculations, I have a formula book for dust collection design around here somewhere. In the meanwhile I will give it a try. I need to use these CT's sometime, they have been sitting here over 3 weeks looking pretty.

Nickao

 

[Fred West]

Nick, shame on you. CTs are not to look pretty but to be used. Pushed to the limits, banged on so hard that their hepa filters need hep.  Or they can look purty.  :

After tomorrow I will have a CT33, CT22 and CT Midi. What would happen if I hooked up the three of these in a series? Can you mix and match or do they have to be the same type? Fred

 

[nickao]

The CT 33 and the CT 22 are the same unit, one with a larger dust bag. So they should not be a problem used together at all.

Nickao

 

[Steve Jones]

Fred, if the Midi disappears during the test, you might find it flipped inside out in the dust bag of the CTS33

 

[Corwin]

I like the idea of connecting two or more CTs together!  With another CT inline, one may be able to better address the DC needs of some of those other tools -- like my lunchbox planner and bandsaw.  Furthermore, if there is an overall increase in volume (and why wouldn't there be?) this increase may make up for the loss that you would encounter when adding too much hose, or adding additional stages inline with your system.  Hmmm, with another CT I might try placing a separator between larger chip producers and my cyclone, then on the CTs -- now that might be sweet!

Only problem with this is that it only seems natural to purchase another CT as part of a package deal.  Now, just what did that say in that photo about package deals?  

 

[robtonya]

My impression....OHMYGAWD!

Per

Per

Noted...... OHMYGAWD,  Thanks, Rob.

 

[CharlesWilson]

One advantage of the two CT's is that when the first one's bag is almost full, you can swap them and just keep chuggin'.

Charles

 

[woodshopdemos]

Here,

This how I get around.[attachimg=#]

Per

Sorry Per, the broker aproached me and said that you were behind on payments and made me an offer I couldn't refuse.