[sudo-discuss] air compressor and plasma cutter

[Patrik D'haeseleer]

Seems like for the CNC plasma cutters, a lot of people are really
recommending a water table as being far more effective at eliminating the
dust and smoke. See this thread, for example:

http://www.pirate4x4.com/forum/torchmate-cnc-forum/1005868-health-concerns-regarding-plasma-dust.html

Something to keep in mind...

Patrik

On Wed, Apr 27, 2016 at 1:16 PM, Jake <jake at spaz.org> wrote:

> please see my last post about the ventilation plan.
>
> as for eye protection, as long as people don't stare at the arc without
> eye protection it shouldn't be a problem.  That said, if people want to
> make a welding curtain like Crucible uses, it's not a terrible idea:
>
>
> http://goffscurtainwalls.com/sites/default/files/styles/slideshow_display/public/ssimages/Weldscreen.JPG?itok=7_mJcT7d
>
> by the way, here's a picture of the plasma cutter:
>
> http://i.imgur.com/Y31qhDs.jpg
>
>
> On Wed, 27 Apr 2016, Patrik D'haeseleer wrote:
>
> We should definitely disallow cutting of any stainless steel, which causes
>> dangerous hexavalent chromium dust. For those of you with the blank stares,
>> hex chromium is the
>> pollutant linked to dozens of cancer cases in the Erin Brokovich movie, a
>> dramatized account of an infamous case where PG&E wound up paying out a
>> third of a billion dollars
>> in damages.
>>
>> We should probably ban any galvanized metals as well. Zinc fumes are
>> nasty. Nickel in stainless steel is a concern as well. So is the cadmium
>> and manganese in some grades of
>> steel.
>>
>> The upshot is that we probably shouldn't be doing any plasma cutting
>> without some serious ventilation. And eye protection of course - a welding
>> curtain or screen might be
>> good to have.
>>
>> Patrik
>>
>> PS: We've been discussing the possibility of doing water testing for
>> metal contaminants in CCL. But having a plasma cutter spewing metal oxides
>> into the air on the other
>> side of the room may very well make that impossible...
>>
>> On Wed, Apr 27, 2016 at 2:26 AM, Marc Juul <juul at labitat.dk> wrote:
>>
>>
>>       On Wed, Apr 27, 2016 at 1:44 AM, Jake <jake at spaz.org> wrote:
>>             BUMP
>>
>>             we got the plasma cutter working!  But the air compressor is
>> still messed up.  We took it apart three times trying to fix the check
>> valve, but it
>>             simply didn't work.
>>
>>
>> I love plasma cutters but how are we going to safely use one indoors? I'm
>> not sure anyone wants to breathe clouds of metal oxides:
>>
>>
>> http://www.hgcodedwelding.com/hg-coded-welding-blogs/plasma-cutting-danger
>>
>> --
>> marc/juul
>>
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>>
>>
>>
>>
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