Re: Waterjet project - access to

In a perfect world, one could use those glass shards to cut more
stuff.

Infortunatly, that process in discussion does not offer itself to
reuse of the grit. the glass can easily be removed as any particles
in water can. but the questions come to the basic ones. is it more
cost effective to dig new wells, and pay for sewage, or to recycle
and have potentially refined hazardous waste to pay hansomly to
dispose of?

and that brings us back to home shops. Laser or water cutting will
produce some solution with particles from the stuff being cut. do
either of these processes create hazardous efflunets ? by that I
mean to the operator as one hazzard, or to the city water/sewar
system ?


Dave

--- In CAD_CAM_EDM_DRO@y..., "Brian" <ka1bbg@w...> wrote:
> Hi, well reuse of water is a nice idea, but cutting glass, the tiny
little
> pieces of glass will eat right thru the hardest of materials. it is
quite
> difficult to remove the very fine glass particles from the water.
With glass
> in the water a pump wont last long! cul brian f.
> ----- Original Message -----
> From: "turbulatordude" <davemucha@j...>
> To: <CAD_CAM_EDM_DRO@y...>
> Sent: Monday, July 29, 2002 9:35 AM
> Subject: [CAD_CAM_EDM_DRO] Re: Waterjet project - access to
>
>
> > Hi Dave,
> >
> > Thanks for the update.
> >
> > Seems that one gallon a minute would be much less than any
industrial
> > useage. It would also seem that re-uisng the water would be
> > exccdinly simple. after a short non-turbulent stint, all the
heavy
> > stuff would fall out, a cyclone would pull most of the remaining
> > stuff and filters could easily handle anything under the size of
what
> > is left. 60 gallons an hour is too simple, and you are correct
the re-
> > cycling would be no only dooable, but in the home shop cost
effective.
> >
> > I would think that in a home shop, we could use magnets to pull
> > ferros metals, and possible some caustic solution to remove
> > aluminum. would have to think about that....
> >
> > Dave
> >
> >
> >
> >
> > --- In CAD_CAM_EDM_DRO@y..., Dave Lantz <dlantz@a...> wrote:
> > > responses intermixed---Dave L.
> > >
> > > >>If you have access to one of these can you satisfy some
curosity ?
> > > sure
> > >
> > >
> > > >What pressures do they run and why ? seems like pressure would
> > > >increase with thickness and or material and or speed. but is
> > there a
> > > >minimum ?
> > >
> > > I think the pressure intensifier here is about 50K psi, i can
check
> > with the
> > > guys int he shop at some point
> > > pressure does change, but not that much, mostly you need to
adapt
> > your
> > > cutting speed for the thickness, or you get a really ugly cut
near
> > the
> > > bottom of the plate.
> > >
> > > >obviously the pressure would help determine pump size.
> > >
> > > not sure what the terminlogy really means, but all the docs
call it
> > a
> > > preasure intensifier, not a pump, per-se...
> > >
> > >
> > > >Do they run a pump direct or pump and intensifier ? and what
is
> > the
> > > maintenance schedule?
> > >
> > > oh, ok... see above, im guessing there is a pump somewhere...
> > probalby
> > > submersed in the well... (see below)
> > >
> > >
> > > >>this would also help to narrow down the best choice to achieve
> > that
> > > pressure.
> > >
> > > a little more info for you:
> > > the system runs an intensfier in the corner, with a long, semi-
> > flexible
> > > copper (or brass, not sure) tube. i remember one of the guys
out
> > in ths hop
> > > saying that it is a very special tube, when it broke, we tried
to
> > replace
> > > part of it with normal copper water hose, and it exploded,
(noone
> > hurt
> > > luckily) it connects to the cutting head in a big parabola,
> > suspended from
> > > the ceiling. there is a preasure guage on the back wall, and
when
> > it drops
> > > under a certain level, they ahve to shut the machine off and let
> > the pumps
> > > catch up, doesn't happen very much.
> > > another side note, we had to get a well to power this thing, and
> > the cutter
> > > ran the well dry last year, and we had to drill another!
> > > abrasive: we use garnet. we don'nt recycle it even though i
think
> > that we
> > > should (not in control of that) it feets to the cutting heat
> > through another
> > > pump system, all VERY HEAVY duty!
> > > the nozzles are saphire, and last quite a while, but are very
> > expensive, you
> > > can tell when they go bad because you no longer get a focused
> > beam, just a
> > > cone.
> > > the table is a giant water tank, with metal slats over it like a
> > plasma
> > > table, it has 'rain gutters' on the sides, and drainage system.
> > ive got
> > > alot of ideas for a better system in regards to the table
itself,
> > let me
> > > know what you think----dave L.
> >
> >
> > Addresses:
> > FAQ: http://www.ktmarketing.com/faq.html
> > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> >
> > OFF Topic POSTS: General Machining
> > If you wish to post on unlimited OT subjects goto:
> aol://5863:126/rec.crafts.metalworking or go thru Google.com to
reach it if
> you have trouble.
> > http://www.metalworking.com/news_servers.html
> >
> > http://groups.yahoo.com/group/jobshophomeshop I consider this
as a
> sister site to the CCED group, as many of the same members are
there, for OT
> subjects, that are not allowed on the CCED list.
> >
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