Re: DC blast gate switch

<<<<When I set up the dust collection in my shop I mounted a 2x4 utility box
with a single pole wall switch adjacent to each blast gate (wired in
parallel) to turn the DC on an off using a relay. That worked okay, but
when I would move from machine to machine I found I would leave the switch
on and have to go around and hunt for the switch I forgot to turn off. >>>>

That's what I basically had in my old shop. Next to the DC was a medium
size electrical box containing a 220/24V contactor and a 24v tranformer.
The single pole switches were just powering on and off the low-voltage
current to the contactor, which in turn, powered on and off the 220v current
to the nearby DC outlet.

Due to the same frustrations you suffered, the new shop used the same
contactor/low voltage transformer setup, I just went with two 3-way and six
4-way switches (dang them 4-ways are pricey!!) giving me 8 spots to turn on
and off the DC, regardless of where I last switched it on. I was a little
scared of the 4-way wiring scematic at first, but my FIL showed me the
light. In the end, its pretty simple, you just have a perimeter system
where starting one direction from the DC you have one wire going to the
first 3-way, then two wires going to the first 4-way, to the next 4-way and
so one until you hit the final 3-way near the other side of the DC, where
you have one wire going back to the DC electrical box. There are two points
where I needed four wires going to and from the middle of the shop floor (I
buried 1" conduit and DC piping before they poured the floor), but in
reality its a simple system that works great and you don't have to worry
about tricky electronics or misplacing your remote.

I'm thinking about upgrading my 2HP Grizz DC with custom felt bag to the 3HP
Oneida Gorilla, but I'm actually discouraged that it comes with a magnetic
switch, since that will be useless given my setup. Well, I suppose I can
use that switch on another machine, as long as its 3hp.

Cheers
Joe



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