Power take off dust extraction

[transatlantic]

Something I have noticed is that people will go to all the trouble of installing extraction duct work, but then proceed to turn the thing on with some kind of remote control. Curious as to why people aren't using a powertake off system similar to a shop vac. ie a system in which the extraction turns on automatically when the tool is turned on.

Having to use a remote seems like such a faff (where the **** is the remote? arrrggghh) and personally I know I'd not bother half the time

And the whole blast gate thing, again ... such a faff.

 

[WellsWood]

..

And the whole blast gate thing, again ... such a faff.

Not if your blast gates also turn on the extractor :wink:

 

[SteveF]

only trouble i see with that is having separate wiring rings
otherwise you would plug your battery charger in and turn on extractor
could be done but requires extra ring mains
and anyone with inverters for tablesaw would have to turn inverter on to start the extractor
and then the inverter would need to be on same ring as bandsaw etc etc

just my thoughts

Steve

 

[transatlantic]

only trouble i see with that is having separate wiring rings
otherwise you would plug your battery charger in and turn on extractor
could be done but requires extra ring mains
and anyone with inverters for tablesaw would have to turn inverter on to start the extractor
and then the inverter would need to be on same ring as bandsaw etc etc

just my thoughts

Steve

oh sure, it would require a different wiring setup, but if you're going to all the trouble of the duct work, seem like a small amount of work to make the system more convenient.

 

[transatlantic]

..

And the whole blast gate thing, again ... such a faff.

Not if your blast gates also turn on the extractor :wink:

Heh - thats clever. No need for the remote then.

 

[transatlantic]

Having thought about this a little more, probably be easier to just have a remote for the extractor attached to every machine. Nothing to lose and it would be right there next to the power switch.

 

[SteveF]

or run a circuit for the extractor power so you can switch at each machine

Steve

 

[WellsWood]

I run a Numatic nv750 which does everything in my shop, with an interceptor bin for the P/T. It is controlled by microswitches on each blastgate connected in parallel to the low tension (12v) side of a big relay which switches the extractor. Power for the low tesion circuit is provided by a transformer which sits in the same box as the relay and uses the same incoming mains from a 13a socket. Has served me well for many years, and no remote to lose!

 

[Adam9453]

simple you permanently attach a remote to each machine that needs it. A lot less hassle and cost than trying to wire the whole workshop to just turn the extractor on automatically IMO.
Plus personally I like to leave my extractor on after i've finished machining to suck up more of the remaining dust which lingers in the air for a bit after cutting for example.
Having said that, i've just fitted a new overhead crown guard with extraction and it virtually eliminates dust coming off the table saw when combined with the main dust extraction sucking through the bottom of the saw.

 

[SteveF]

I run a Numatic nv750 which does everything in my shop, with an interceptor bin for the P/T. It is controlled by microswitches on each blastgate connected in parallel to the low tension (12v) side of a big relay which switches the extractor. Power for the low tesion circuit is provided by a transformer which sits in the same box as the relay and uses the same incoming mains from a 13a socket. Has served me well for many years, and no remote to lose!

sounds a neat idea
but how do you turn it off, just shut the gate?
I guess this adds protection from forgetting to open or close a gate
a picture would anser a thosand words

Steve

 

[WellsWood]

simple you permanently attach a remote to each machine that needs it.

Except that none of the remote sockets that I have seen are man enough for a 2.5Kw extractor. Like I say, it has served me well for years - though i did have to rebuild the internals with a heavier duty relay when I upgraded my extractor a few years ago. Horses for courses: I'm not saying my way is best, just that it is my way, and that it works well for me.

 

[WellsWood]

Steve, yes - gate open extractor on, gate closed extractor off.

Pictures?
Oh, alright then:
swithes on blastgates

control box sits on wall next to extractor

not much going on inside

all plumbed in (but not pretty)

separator seems to work

 

[SteveF]

looks a neat setup you have there
not sure I have seen a "can" type extractor with a bag below before

anyways...rather than start a new thread (I am sure the sharpening brigade are getting jealous of all the threads on dust)
anyone thoughts on running 2 x 4" pipes meeting at a 6" splitter either end of a long run?
I think consensus says use 6" if your machine can handle it, but it causes height issues in half my shed

Steve

 

[Monkey Mark]

Maybe it's changed since I last looked, but the stand alone power takeoff units we're quite expensive.
May be that's a relative comment to how you view things, but certainly expensive in my eyes anyway.