[Vanhackspace] Oxy/Acetylene Rig.

[Dave Dillabough]

I'll be out of town until late July but should be good after that. For
plasma we would need about 240 volts/50 amps single phase, less with
higher voltages or 3 phase. It makes much smoke and air born dust. I have
a few #5 shades but if anyone has OA shades (#3 or #4) that they can bring
these are good enough for watching what is going on. I can bring some
metal to chew up but if you have something that you want to try bring it
along. Up to 1/2" steel should be no problem with that power. If more
power is available the machine can do up to 1".  Thin templates out of
wood can be used as a guide. Templates should be .08" ( 80 thou) smaller
than the finished dimensions that you want. Is there a good fire
extinguisher there? If not I will bring one. I'll bring some gouging tips
and fine cut tips too.

Dave

On Wed, June 23, 2010 10:53 am, dan anderson wrote:
> I would be interested if you do an oxy-acety and/or plasma tutorial.
>
> On 22 June 2010 17:16, Dave Dillabough <daved at deepgreen.ca> wrote:
>> If you are going to weld you should build a welding booth. Walls and
>> floor
>> should not be flammable. You can get cement board in 4x8 sheets that
>> would
>> work OK. You should also have ventilation. Welding can generate nasty
>> fumes and burning acetylene generates a black soot that gets everywhere.
>> Smoke alarms can be an issue and you should check with your insurance
>> too.
>> Acetylene leaks can make a big bang. In general with OA welding you
>> should
>> know what you are doing with pressure, flashback arrestors etc. or any
>> number of things can go impressively wrong. The rate that you can draw
>> acetylene from a cylinder depends on its cross section.  A B cylinder
>> won't generate enough acetylene for most cutting as it does not have a
>> large enough area. If you try to pull too much acetylene out you will
>> start drawing the acetone that the acetylene is desolved in.  You would
>> be
>> better off using propane for cutting (a BBQ tank) as you will get enough
>> gas and it is much cheaper. Propane will work with acetylene tips
>> although
>> a propane tip will work better.
>>
>> OA can be fun if done safely. If you go ahead I would be happy to help
>> with a tutorial. I could do one on TIG or plasma cutting too.
>>
>> Dave
>>
>>
>> On Tue, June 22, 2010 1:49 pm, dan anderson wrote:
>>> The slag would leave big scars, yes. A canvas dropcloth won't cut it.
>>> You can drop a sheet of plywood though, and as long as you're careful
>>> to blow slag straight down it'd work, but it means keeping a sheet of
>>> plywood around (honestly not the worst idea, if folks are
>>> anglegrinding or using the MIG rig).
>>>
>>>
>>>
>>> On 22 June 2010 12:46, Derek Anderson <derek at enomaly.com> wrote:
>>>> Acetylene torch + wooden floors == "Whodathunkit?"
>>>> Usage out in the alley would probably be OK though...
>>>>
>>>> On Tue, Jun 22, 2010 at 1:35 PM, John Craver <jcraver at shaw.ca> wrote:
>>>>>
>>>>> It has both.
>>>>>
>>>>> ----- Original Message -----
>>>>> From: kevin griffin <kevin at cavewallarts.com>
>>>>> Date: Tuesday, June 22, 2010 10:54 am
>>>>> Subject: Re: [Vanhackspace] Oxy/Acetylene Rig.
>>>>> To: vanhackspace at lists.uselessdegree.net
>>>>>
>>>>> >
>>>>> > > Hey, I just picked up a small oxy-acetylene (think 40cf oxy
>>>>> > and a B
>>>>> > > size acetylene tank) welding/cutting rig from
>>>>> > craigslist.  It's in
>>>>> > > almost new condition, and I got a screaming deal on it (the
>>>>> > guy bought
>>>>> > > it and then realized that it's overkill for his
>>>>> > purposes).  Is this an
>>>>> > > item we want at the hackspace, or is it considered too sketchy?
>>>>> >
>>>>> > Does it have a welding tip and or a cutting extension?
>>>>> > > _______________________________________________
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>>>>> > >
>>>>> > >
>>>>> >
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>>>>
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