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Von: CAD_CAM_EDM_DRO@...
[mailto:CAD_CAM_EDM_DRO@...] Im Auftrag von afogassa
Gesendet: Samstag, 2. September 2006 03:03
An: CAD_CAM_EDM_DRO@...
Betreff: [CAD_CAM_EDM_DRO] Re: How small can a plasma torch get?



--- In CAD_CAM_EDM_ <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
DRO@..., Ron Ginger <ronginger@...>
wrote:
good evening from vienna to ron ginger
I have none built by myself, but I have ordered really tons of laser as well
as plasma cutted stainless steel parts, from TP304 to very high grades as HL
and so.

From my experience with Austrian and german companies plasma cutting is much
better in termns of accuracy than oxygen cutting. But laser cutting is about
10 times better resulting a much smaller area which remains heat effected,
gives a much smoother cutted surface- which makes it working later on with
stainless steel material much more easier and cheaper as the cutted surface
needs not to be glass blasted prior to welding execution.

Best of all would be electronic beam cutting, for extreeeme precise cutting
in vacuum and clean room condition.

Best greetings from Vienna

Josef wagner


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For years Ive wanted a laser to cut parts for model engines, but to cut metal I realize the laser power is too high and the prices way out of my range.

But maybe a plasma cutter could do it- are there plasma torches that will cut real small parts? Could I cut something like a model locomotive frame, maybe 1" wide by 10" long, with a variety of cutouts?

Ive already built a CNC router for wood and plastic, and have a CNC mill for oterh parts, but cutting sheet metal with a plasma CNC would be cool.

ron ginger

--- In CAD_CAM_EDM_DRO@..., Ron Ginger <ronginger@...> wrote:

For years Ive wanted a laser to cut parts for model engines, but to cut
metal I realize the laser power is too high and the prices way out

of my

range.

But maybe a plasma cutter could do it- are there plasma torches that
will cut real small parts? Could I cut something like a model

locomotive

frame, maybe 1" wide by 10" long, with a variety of cutouts?

Ive already built a CNC router for wood and plastic, and have a CNC

mill

for oterh parts, but cutting sheet metal with a plasma CNC would be

cool.

ron ginger

Ron, you can do some nice detail with the smaller plasma units like
the Hypertherm 600. If you can justify the cost you can step up to
the Hypertherm 1000 and use Fine Cut tips and hold a .035 kerf. I have
lots of experience cutting decorative and detailed stuff with plasma.

Our new series of Digital THC's will hold the .050 to .63 gap you
need at 150 IPM over warped metal. We just had some posts on cutting
14 ga steel on the CandCNCSupport yahoo group. Newbees are welcome and
so are grizzled veterans like yourself (;-).

Tom Caudle
WWW.CandCNC.com

--- In CAD_CAM_EDM_DRO@..., Ron Ginger <ronginger@...>
wrote:

For years Ive wanted a laser to cut parts for model engines, but

to cut

metal I realize the laser power is too high and the prices way out

of my

range.

But maybe a plasma cutter could do it- are there plasma torches

that

will cut real small parts? Could I cut something like a model

locomotive

frame, maybe 1" wide by 10" long, with a variety of cutouts?

Ive already built a CNC router for wood and plastic, and have a

CNC mill

for oterh parts, but cutting sheet metal with a plasma CNC would

be cool.

ron ginger

Hi Ginger,
I've built a plasma cutter last year 1,5 x 3m(meters), after
talking with a hiperterm sales person he told me that there is a tip
just for thin material good up to 1,5mm. I did not try it.
You can do details as small as 3mm,on the machine I've built.
You'll need a torch hight controller, got mine from rutex, or thin
staff will warp so much that the tip will hit the material and when
that happens the torch starts shooting to the sides.
You can also use water when cutting to minimize warp.
I don't think you can get better than 2mm details.
small holes are a pain to do below 6mm ID.
I would say it's good just for rough cuts than finish with the
mill.
It can save a lot time doing this way.
I've being thinking about a water jet, cuts about anything, cheaper
the laser but slower and with the advance in software and pumps I
think it's the way to go.( how about those beautiful granite
medalion up to 2" thick or more)

Fogassa

--- In CAD_CAM_EDM_DRO@..., Ron Ginger <ronginger@...> wrote:

For years Ive wanted a laser to cut parts for model engines, but to cut
metal I realize the laser power is too high and the prices way out

of my

range.

But maybe a plasma cutter could do it- are there plasma torches that
will cut real small parts? Could I cut something like a model

locomotive

frame, maybe 1" wide by 10" long, with a variety of cutouts?

Ive already built a CNC router for wood and plastic, and have a CNC

mill

for oterh parts, but cutting sheet metal with a plasma CNC would be

cool.

ron ginger

I'm going to get a bad reputation for silly ideas at this rate:



I created the holes in this rasor blade using a small 80v supply, a
plasma globe powersupply some brass tube and an airbrush compressor.

Taking this a step further into a machine that might cut something
seriously is probably a bit of a jump but not so daft. The smaller
plasma cutters have relatively low currents of around 12A and will cut
say 1mm thick steel at that I think.

I'm not sure how well plasma cutting scales, in industry they don't
consider it for thin sheet because laser fits the bill so well but
there are plenty of hobby applications where the ability to cut 1mm
thick steel to OK accuracy could be really handy. There are really
two main components to consider, the supply and the handpiece. The
latter is probably best bought as a spare part, the former could be
built fairly simply for low powers.

That all said perhaps minaturization of the nozzle diameter would be a
good thing if you are also going to thinner material.

You didn't actually mention the thickness.

I see a few of you are cutting some pretty thin stuff, can you give me
an idea of your settings, what is the voltage and current and what is
the starting mechanism of the torch? If I can select the right
handpiece I'll happily buy one to play with.

Graham