Re: orange peel on aluminum

Hi Tom,

I'll give this a shot.

1) they both work well.
2) Health? mister gets your lungs, flood gets your skin.
3) Which one makes more sense has to do with the type of machine, and
amount of metal removal. Flood is what VMC's (mostly) use, but they
are enclosed and designed for it...
4) Part finish? Flood is more forgiving, IMO. But more "maintennance"
issues too.
5) Do you want to run a compressor for your mister? Or is your usage
small enough that you can get by with a garden sprayer type setup?

So much of the answer depends on the details... I use both. Different
needs, different solutions.

For the original problem of hobby flycutting of a small (relatively)
AL surface, I'd just use WD 40 in a pump spray bottle. Be sure the
cutter geometry/ speeds/feeds is correct!

Hope this helps.

Ballendo

P.S. on #2 above: A PROPERLY functioning "mister" is "supposed" to
operate without putting any coolant into the surrounding air. Many do
NOT operate properly! You didn't mention "drip" coolant/lube which
can be made to work well; reduces the "mist in the air" effect, and
also minimises the bacteria build-up common to Flood sumps, and the
attendant contact dermatitis...

--- In CAD_CAM_EDM_DRO@y..., "Tom Eldredge" <harmonyt@r...> wrote:
> Jon,
>
> I recall some posts regarding flood/mister comparrison. I prefer
not to
> discuss the environmental concerns of each, unless you think they
are an
> important concern for a normally healthy person, but I would like
one of you
> to comment on the relative benifits of one method over the other in
light
> machining of aluminum. I am interested in a quality finish. I am
familiar
> with the problem of metal deposits on the tool in machining
aluminum causing
> poor finish results. Part of my concern is the mess caused by one
method
> over the other. It seems that the mister would produce much less
mess to
> deal with when machining large parts.
>
> Tom E.
>
> ----- Original Message -----
> From: Jon Elson <jmelson@a...>
> To: <CAD_CAM_EDM_DRO@y...>
> Sent: Friday, April 20, 2001 6:19 PM
> Subject: Re: [CAD_CAM_EDM_DRO] orange peel on aluminum
>
>
> >
> >
> > Jon Anderson wrote:
> >
> > > Smoke wrote:
> > > >
> > > > I'd say the biggest culprits to look for would be toll
vibration and
> > > > dull tools.
> > >
> > > I'll second this one. Aluminium build up on the tool causes
smearing and
> > > tearing, and can leave little bits of aluminum welded to the
plate by
> > > the trailing edge.
> >
> > Keeping the aluminum cool is very important. When it heats up,
even
> > a little, it gets softer, and the tendency to melt on the tool
increases
> > dramatically. I use flood coolant on many aluminum machining
> > operations to keep the workpiece cool, and prevent this kind of
mess.
> > Flycutting generally doesn't cause that much heating of the work,
but
> > the tool gets pretty hot.
> >
> > Jon
> >
> >
> > Welcome to CAD_CAM_EDM_DRO@e...,an unmoderated list for the
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